What causes hesitation and stumbling in a 1990 Chevy c1500?

An expert that got 10 achievements. Re: 1990 chevy c1500 hesitation and stumbling during… Based on what you said, I would say the engine is starving for fuel. The computer has to be disabled to set timing – there should be a procedure for that. I would start with checking fuel pressure at the throttle body.

Why does my Chevy c1500 not start up?

SOURCE: No fuel to the injectors on a 1997 Chevy c1500. can be the distributor or maybe the fuel pump let the truck sit and then turn key almost on but not enough to initiate start up and see if you hear pump in the gas tank and if thats not it, it could very well be your distributor it might be moist in the cap or button area

What should I replace on my 1998 Chevy k1500?

Here is what has been replaced to try and stop this misfire: spark plugs, spark plug wires twice, distributor cap twice, rotor, ignition coil, EGR, CTS on intake manifold, coolant temp gauge sender, fuel filter, fuel pump, MAF sensor, oil change.

What is the TPS code for a 1990 Chevy c1500?

TPS code 22 low voltage 3. MAP code 34 low voltage. 4. IAC valve stuck. 5. timing is off. problems fixed so far. 1.

What causes a Chevy Silverado to run rough?

If an oxygen sensor goes bad, it can make your Silverado run too lean (or rich). A super lean running engine will often idle rough. Fuel Injectors. The fuel injection systems job is to atomize the fuel into fine mist.

Why does my GMC Sierra 1500 run rough at idle?

The spray smoothing out the rough rpm is an indication of the engine running lean, could be low fuel pressure, could be a vacuum leak. With it running rough at an idle and smoothing out at a higher rpm is a general sign of a vacuum leak.

Why is my Chevy Vortec 4300 V6 leaking fuel?

In the L35 and LF6 engines, the spider injectors are known to leak at the pressure regulator and at the supply and return lines due to a design fault. Outside of leaking fuel onto the exterior of the engine itself, it can cause excess fuel to get sucked into the engine.

What causes a carburetor to pop on a new car?

A clogged fuel filter or faulty fuel pump can cause issues with fuel delivery. This results in a fuel mixture that is too lean for the engine and results in backfires through the carburetor.

What causes CARB to backfiring on hard acceleration?

Im unsure of the condition of anything on the engine and the engine itself as it is all second hand. BA’o’Matic 100% working. Well if timing is way out, and it andvances too far on full throttle would cause it, so a dizzy regraph may be the go, or is the dizzy shaft etc, just worn out.

When does the carb pop during engine compression?

Popping/crackling through the carb during acceleration, cam, compression, or what? Discussion in ‘ Engine Topic ‘ started by Penix, Feb 14, 2009 .

What causes a CARB to pop during acceleration?

Had all three happen in the old original 305 SB I had in my car before upgrading it to a 355 SB. Found three lobes on the cam were ground completely round, two lifters were dished out and their corresponding pushrods were all bent. I would check these on your engine.

What was the problem with my 1990 Chevy k1500?

My old 1990 K1500 had the same stalling problems until I changed the EGR valve. We have a 1990 2wd 350 tbi with similar issues. So far it has a new distributor (for an unrelated problem), idle valve, throttle position sensor, knock sensor, temperature sensor, fuel filter, plugs & wires.

Why does my truck stall when I turn a corner?

The ABS code – I believe you can reset, short of a true failure and then that’s another story. The stalling when going around a corner. Fuel level in the tank? below a 1/4 of a tank, maybe the (in tank) fuel pick up is sucking air when the gas sloshes going around corners..

What kind of engine is a 1990 Chevy c1500?

1990 Chevrolet C1500 — 350 V8 TBI — Regular Cab, Short Bed, 2 wheel drive, 89000 miles. New parts: EGR valve, coolant temperature sensor, fuel filter, idle air control valve, pcv valve, air filter, 1 oxygen sensor (in the exhaust manifold), spark plugs, distributor cap and rotor. My truck’s compression is good and I do get spark.

Are there any problems with the Chevy Silverado 1500?

Chevrolet Silverado 1500 owners have reported 17 problems related to vehicle shudder (under the power train category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Chevrolet Silverado 1500 based on all problems reported for the Silverado 1500.

What causes a Chevy Silverado 1500 to shake?

Tl the contact owns a 2016 Chevrolet Silverado 1500. The contact stated while driving 45 mph, the vehicle start to shake abnormally when the accelerator pedal was depressed. The contact stated that the check engine warning light was illuminated.

Why does my Silverado k1500 stall at traffic lights?

In neutral it will run indefinitely, although it gets a little rough. Pulling a vacuum line will raise the idle, but doesn’t help when you put it in gear. Pulling to a traffic light with the a/c on high, it will idle perfectly for a few seconds, then start gradually dropping, finally shudder and die after 15 -30 seconds.

What kind of engine does a GMC pickup have?

This engine was designed as a direct replacement for 1987-1995 Chevy & GMC pickups, SUV’s, and van applications. These vehicles featured a 350 ci, 5.7 small block Chevy with TBI (throttle body injected) EFI system and swirl port heads.

How to repair a 1988 GM vacuum truck?

Access our GM Full-Size Trucks 1988-1998 Vacuum Diagrams Repair Guide by creating an account or signing into your AutoZone Rewards account. Once you sign in, follow these instructions to access our Repair Guides. Add your vehicle in Manage My Vehicles. Enter your vehicle details. Click the “View More” button, and then click “Vehicle Repair Guides.”

What kind of engine was in 1990 Chevy C / K?

The 7.4-liter V8 engine was revised, and could be mated to a 4-speed automatic instead of the prior 3-speed. In the 454 SS, that engine now made 255 horsepower–25 more than in 1990. 1992 C/K Pickup. Sportside trucks with the flare-fendered cargo box could have an extended cab this year.

What kind of engine does Chevy C / K 1500 have?

For 1997, the optional third door could be ordered on any C/K 1500 model, not just the top-line Silverado. Chevrolet made few changes to the C/K as it readied a replacement for the 1999 model year. At introduction, base engine for the C/K 1500 and 2500 was a 160-horsepower, 4.3-liter V6.

What causes an Audi A4 to idle rough?

A super lean running engine will often idle rough. The fuel injection systems job is to atomize the fuel into fine mist. If a fuel injector has an issue with this process, it will either let too much or too little fuel into the combustion chamber relative to the amount of air.

What kind of truck starts and then dies?

From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. My 99 Yukon with Vortec 5.7L suddenly won’t run. It cranks over fine, starts in about 1 second (normal), but then dies 2-3 seconds later.

What causes a 1994 Chevy C / K 1500 to bog down?

– CarGurus 1994 Chevy C1500 5.7 bogs/backfires when I give it gas. My truck bogs down (and tries to die) when I give it gas to accelerate off of a stop. There is often a backfire or two when this happens. Pumping the gas does not help. I basically have to crawl through any intersection until it picks up a bit of speed from idle. The truck

When does a 1995 Chevy K 1500 350 TBI hesitate?

An expert whose answer got voted for 100 times. Re: I have a 1995 chevy k 1500 350 tbi it hesitates when…

What should I do about my 1994 Chevy Silverado?

My 94 Chevy Silverado was also sputtering, backfiring, missing etc… I changed the fuel filter to no avail, tried several things to get it to run smooth but nothing helped’ until a friend of mine who used to have his own shop told me about a memo he had received years ago dealing with this identical problem. here’s what worked for me!

What kind of car is a C / K 1500?

Chevrolet C/K 1500 Questions – 1994 Chevy C1500 5.7 bogs/backfires when I give it gas. – CarGurus 1994 Chevy C1500 5.7 bogs/backfires when I give it gas. My truck bogs down (and tries to die) when I give it gas to accelerate off of a stop.

How much is a Chevrolet C1500 engine control computer?

10% OFF $75. Use Code: DIYSAVE10 Online Ship-to-Home Orders Only Your C1500 is no stranger to hard work and neither are you. Get the most out of your truck by working smarter, not harder. Install a new Chevrolet C1500 engine control module to ensure that your engine is performing to the best of its ability.

When was the last time a c1500 was made?

Late 1995 the 1500 sieries and 2500 sieries two wheel drive trucs were assembled with the newer 4L60E transmission and the 700 R4 was no longer used at this point. Get notified for new files? We’ll send you a quick email when a new Chevrolet C1500 document is added.

Chevrolet Silverado 1500 owners have reported 141 problems related to suspension (under the suspension category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Chevrolet Silverado 1500 based on all problems reported for the Silverado 1500.

What was the problem with the c1500 TBI in 1990?

1990 C1500 TBI 5.7L Idle… 1990 C1500 TBI 5.7L Idle is surging when warm. Unplug the MAP Sensor and the problem goes away, I replaced the MAP Sensor with one from Autozone, and that didn’t fix the problem.

Why is my 4L60E not shifting into 4th gear?

Below are some common things that fail in the 4L60E and cause this problem. It probably goes without saying, but if you put the vehicle into second gear manually, you’ll still be able to get to where you need to go. If you end up with a bad sprag, the 4L60E won’t be able to shift into 3rd or 4th gear.

Why does my Chevy k1500 4WD not engage?

As far as i know just replacing the axle shouldnt effect if it goes in 4×4. If it will not even go into low range sounds like a transfer case problem to me.

What does the 4×4 do not engage on a 1990 Chevy pick up?

Re: The 4×4 do not engage on my 1990 chevy pick up what… On the full size, the front actuator is electric, not vacuum. When in 4wd mode, a switch on top of the transfer case conducts 12 volts out to the actuator. Wire #50 (brown) is the 12v feed, and it conducts to the light blue wire (#900) to the actuator.

Are there any problems with the Chevy 4.3 engine?

Once you have ruled out all the basics, you can go back to what the Chevy 4.3 engine is known for: bad idle air control valves and throttle control switches. This article was written by a professional writer, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.

Why is my Chevy Silverado running rough at idle?

Really, your Silverado will be running rougher at any RPM, but a misfire will be most pronounced at idle. Spark Plug Wires – While not every model and engine combination of vehicles today comes with spark plug wires (a lot are now coil on plug), if your Silverado happens to have them, they can go bad and cause a rough idle.

What kind of idle does a truck have?

Rough idle but otherwise… Truck runs great when driving down the road and idles smooth for a couple minutes after coming to a stop. Then it develops a “stumble” that is very pronounced. I’m fairly confident it isn’t ignition as the distributor, cap, plugs, wires, and coil are new.

Why does my truck stall when I make a left turn?

Messages: 97. If it’s stalling due to the additional load applied by power steering at idle (foot off accelerator) then the engines idle control system could be at fault. Also with the heater changing this could be a vacuum problem.

When do I hit the gas, my truck stalls?

For example, when I come to a stop light/sign, then hit the gas while i am turning, about 95% of the time it will not stall. Now when I have to brake going around a turn (no gas) it putters out and shuts off. My ABS as well as my Check Engine lights are on.

Why does my car stall at low speed?

If very low speed it could be the vehicle speed sensor. At very slow vehicle speed if a load is applied to engine such as turning it will tell the computer to speed the engine up slightly to avoid stalling. I have replaced several on chrysler product over the last few years. I’m no mechanic by any means. Just some thoughts…

What causes a truck to hesitate when accelerating?

Hesitates When Accelerating: the Initial Problem Was the Truck The initial problem was the truck stalled and died. The following parts have been replaced: spark plugs, wires, fuel filter, distributor, cap, rotor, pick up coil, map sensor, throttle position sensor, and idle air control valve.

Why does my Chevy truck stumble when idle?

Very shocking because it’s never done that. A few days later it began to stumble and hesitate upon acceleration. During idle it would sound as if it were about to shut off but it wouldn’t. Rough idle and hesitation sounded like a vacuum problem, so I checked the TBI.

What was the problem with my Chevy truck?

Okay, after about 45mins of driving, this is what was going on. the engine drove fine. the problem this time was with the transmission! It would not kick back down or downshift properly. It would just cause the engine to rev and rev. But after about 10mins of that, it went away.

Are there any problems with the Chevy 4.3 Vortec engine?

The 4.3 Vortec engines made from 1996-2002 (L35 and LF6) have been reported to have engine knock problems. In a properly functioning engine, fuel burns in even pockets instead of all at once. The pockets burn in even timing, in sync with engine cycles. Engine knock occurs when the fuel burns unevenly and out of sync with the engine cycles.

TPS code 22 low voltage 3. MAP code 34 low voltage. 4. IAC valve stuck. 5. timing is off. problems fixed so far. 1.

How to troubleshoot a no start GM 4.3L pick up?

Testing a Cranks but Does Not Start condition on your GM 4.3L, 5.0L, 5.7L pick up, van or SUV is not that hard to do, if you have a solid diagnostic strategy. In this article I’ll show you the basics of testing such a problem.

Can a GM 454 back fire under load?

I have a 95 Bounder 28 with GM 454. I bought it used and discovered too late that it back fires under load during a hill climb. If I back off it stops but I also end up dropping down to 40-45 mph at times.

Why is my GMC Sierra 1500 stalling and dying?

There is no code given. Have changed the injectors, timing, fuel tank, fuel pump, fuel pump, map sensor, cooling temp sensor on front of block, rebuilt the tbi, air idea valve. None of this hasite helped. The truck starts and dies. Have to give a little gas to keep running. While driving have to 2 foot it so it won’t die.

Other Electrical System related problems of the 2009 Chevrolet Silverado 1500 Electrical System problems 29 Car Will Not Start problems 2 Battery Cable problems 2 Ignition Module problems 1 Battery Dead problems 1

Why does my C / K 1500 have no power?

I have a ’97 k1500 with a 350 and 4l60e automatic. Assuming all things are OK with the truck, would a bad fuel pressure regulator cause it to have no power at low rpm’s?

Why does my Chevy C / K 1500 bog out under acceleration?

It always bogs under acceleration, wont peel out even when its wet, and must downshift to gain speed on the highway (but it still runs at the normal rpm range when on the highway). 16 people found this helpful.

What causes a GMC Sierra 1500 to stall?

But the stable idle won’t last long, it’ll idle low and rough. Mpg has decreased drastically and give off a rich smell when running. 308 people found this helpful. Bad hesitation off of the start, pumping the gas pedal helps to get her going. Pushing the pedal hard well bog it out and almost stall. 290 people found this helpful.

Why is my C / K 1500 surging at idle?

TPS SENSOR BREAK INSIDE THESE THINGS AND CAUSE IRRATIC IDLE. THE IDLE AIR CONTROL IS ALSO NEXT TO IT PULL THAT AND ENSURE IT ISNT COVERED IN CARBON.IF IT IS CLEAN WITH CARB CLEANER

What causes an engine to surge during a tune up?

Step 2 – An engine’s tune up is a regularly scheduled service, when this service is neglected it can cause the engine to surge. Learn more Step 3 – If a fuel pump or regulator is failing is can cause an unsteady volume or pressure for the fuel system causing the engine to surge. Learn more

TPS SENSOR BREAK INSIDE THESE THINGS AND CAUSE IRRATIC IDLE. THE IDLE AIR CONTROL IS ALSO NEXT TO IT PULL THAT AND ENSURE IT ISNT COVERED IN CARBON.IF IT IS CLEAN WITH CARB CLEANER

Why is my car surging at idle speed?

When an engine’s computer can “hunt” or “surge” at cruising or idle speeds it is searching for program compliance, there is a problem elsewhere in the system.

Can a vacuum line cause an engine to surge?

Learn more Step 5 – If a vacuum line has caused a leak the engine will surge, as vacuum lines age they can become brittle and fall off the engine or accessory. Learn more Step 6 – If an air intake boot becomes torn and develops a leak it will cause the engine to surge.

What are the names of the CK trucks?

Also includes 1999 Silverado and Sierra Classic, 1992 – 94 Blazer, 1995 – 99 Tahoe, 1992-99 Yukon, 1992 – 99 Suburban These trucks use the control arm / spindle set up in the front as did the previous GM trucks. There were two different spindles on the 1500’s that can cause some headaches if you don’t pay attention.

When did the C / K Chevy truck come out?

The C/K was Chevrolet and GMC’s full-size pickup truck line from 1960 until 1999 in the United States, from 1965 to 1999 in Canada, from 1964 through 2001 in Brazil, from 1975 to 1982 in Chile. 1500, 2500, and 3500 designations were used to indicate 1/2, 3/4, and 1-ton trucks.

How do you lower a Ck truck 4×4?

This is also the first generation that we have parts available to lower the 4×4’s. Use a set of keys in the front for about 2 inches of drop and the rear is the same as the 2WD trucks. Le transporteur a eu beaucoup de… Le transporteur a eu beaucoup de difficultés a livré mon colis.

What to do with a 98 Chevy 1500?

I want u to clean the air intake valve and idle speed control valve, follow the procedure below.

Why does my car sputter when I Turn on the engine?

The fuel filter ‘s job is to filter the fuel going to the fuel injectors and then enter the engine. A clogged fuel filter can cause the engine to get too low fuel pressure or cause a clogged fuel injector. Low fuel pressure will cause the engine to run very leanly, and therefore it may cause the engine to sputter.

What does it mean when your car engine is spluttering?

A spluttering engine is a cause of concern for many motorists. It could mean that your fuel injectors are clogged and are no longer supplying the right amount of fuel. If the catalytic converter is faulty, harmful gases can find their way to the atmosphere. Some of these gases, like sulfur, are identified by their strong egg smell.

Why does my Chevy truck sputter when I accelerate?

The engine starts and runs fine, when I leave for or from work. But when I accelerate out of the parking lot it hesitates and really sputters. If you try to accelerate more it backfires a few times and then takes off like there’s nothing wrong.

What causes a car engine to sputter with low fuel pressure?

If your fuel pressure is too low, there is definitely something wrong with either the fuel filter or the fuel pump. If there is a leak around the intake manifold or at the hoses from the intake manifold, it may cause a too lean mixture, which will cause your car engine to sputter. The easiest way to find this is to use an EVAP smoke machine.

What does it mean when your car is sputtering and popping?

Here we go again. acceleration Sputtering and popping was the first indication of trouble with mine (see: Another one not running ). I’d be cruising on the highway and step on it and it would cough and sputter and then clear up. Made me think of carbon’ed up plugs and I dismissed it at that.

What kind of misfire does a Silverado C10 have?

My 1986 Silverado C10 with a small block 305 is having a weird misfire issue. At idle it has a slight miss, and under load any sort of load or while accelerating through mid range RPMs, it runs like absolute crap and will even feel like a shutter at times.

What does a Chevy small block cylinder feel like?

At idle it has a slight miss, and under load any sort of load or while accelerating through mid range RPMs, it runs like absolute crap and will even feel like a shutter at times. It feels like a very bad miss. I did have a fouled plug some months back (was running too rich), and after swapping it everything was fine.

What kind of car hesitates when trying to accelerate?

Re: I have a 1995 chevy k 1500 350 tbi it hesitates when trying to accelerate changed plugs wires cap and rotor it dose have… Mass air flow sensor would be suspect. You can’t post conmments that contain an email address. An expert that got 5 achievements. Visited the website for 3 consecutive days. An expert that has 1 follower.

What’s the problem with my Chevy Tahoe 1999?

It’s a Chevy Tahoe 1999 2 door.. It can be fuel pressure issue or it’s the problem with accelerator pedal or its clogged filters causing there. There are many other possibilities. I suggest you to go through the list of help links mentioned below, these will help you to confirm where the actual fault lies: ——-

How to troubleshoot a hesitating or bucking car?

Step 1: Physically inspect the fuel filter. If the fuel filter is dirty like the image on the right, it’s probably causing a restriction of fuel flow to the engine and should be replaced. Step 2: Check for leaks coming from fuel filter connections. The fuel line is spliced between two fuel lines.

Why does my Chevy Tahoe feel slower then normal?

Everthing works it just feels slower then normal.. It’s a Chevy Tahoe 1999 2 door.. It can be fuel pressure issue or it’s the problem with accelerator pedal or its clogged filters causing there. There are many other possibilities.

What should fuel pressure be on 1993 Chevy TBI?

Verify there is 18-20 of fuel pressure when you dead head the fuel pump. If low, verify there is good power and ground to the fuel pump and that the fuel filter is clear. Also, make sure that the MAP sensor vacuum port in the throttle body is not restricted.

Why does a car run when it’s cold?

While cold, the ring-cylinder mate is tight, keeping the combustion gasses from blowing by and allowing the engine to run.

Can a Chevy C / K 1500 run at idle?

There is often a backfire or two when this happens. Pumping the gas does not help. I basically have to crawl through any intersection until it picks up a bit of speed from idle. The truck idles smoothly, and it runs fine once it’s above about 5-10mph or so. If moving at a picking up the speed.

What kind of engine does a Chevy c1500 project have?

If you’ve been to this site before, you might be familiar with my 1991 Chevrolet C1500 project truck. Long story short, I needed to swap the V6 in the truck for another engine (it had a rod knock).

Where was the 1992 Chevy C / K 1500 last serviced?

Mileage: 95,870 miles Body Type: Pickup Color: Burgundy Engine: 8 Cyl 5.7 L No accident or damage reported to CARFAX. Number of owners unknown. Last serviced at 162,366 miles in Fresno, CA on 01/15/21 • Vehicle serviced • Oil and filter changed. Mileage: 162,460 miles Body Type: Pickup Color: White Engine: 8 Cyl 5.7 L

What’s the difference between a C and K Chevy truck?

Chevrolet prefaced the truck’s numerical rating with a “K” to signify four-wheel drive models. The 10- and 20-series pickups got coil springs all around, and 30-series trucks got leaf springs in the rear. Aside from the transfer case and front axle, C- and K-series trucks were practically identical.

How many miles does a 1992 Chevy C / K 1500 drive?

No accident or damage reported to CARFAX. 1st owner purchased on 09/17/92 and owned in CA until 03/18/19 • 2nd owner purchased on 03/18/19 and owned in CA until 06/02/21. 1st owner drove an estimated 4,798 miles/year • 2nd owner drove an estimated 5,617 miles/year.

What kind of engine does Chevy 1500 have?

I own a 2008 four-wheel drive, full-size Chevy 1500 truck (gas model), crew cab with a 5.3-liter engine that I use for my job. For my around town vehicle my wife and I use our Toyota Prius but it won’t carry equipment or handle muddy roads like my full-sized Chevy.

What causes low fuel pressure in an engine?

1 Clogged Fuel Filter The fuel filter cleans the fuel entering the engine. 2 Bad Fuel Pump A bad fuel pump is probably the most common cause of low fuel pressure. 3 Bad Fuel Pressure Regulator The fuel pressure regulator controls the fuel pressure in the fuel rail.

Is there a problem with my 454 engine?

I have asked a number of people and have been told that it is a motor home issue caused by the dog house engine cover and that the 454 was redesigned around that time to increase engine heat to increase millage. My question remains, is it just my 454 or have other people had the same problem?

Is there a problem with a 74 Chev Van?

I had starter problem on 74 chev van a few yearsback.Wouldn’t startafter towing trailer. It burned out and discount auto had a high temp rebuilt.It was just a starter that had armature and selinoid turned down. Never had another problem.

Is the Chevy TBI 454 having Idle problems?

Recently rebuilt the 454 in my 1990 TBI Burb. I am having a terrible time with getting it to idle smooth. The engine has a little over 500 miles on it. I have spent countless hours going over the engine looking for vacuum leaks and believe every thing is OK on that front.

Why does my 454 spark plug keep failing?

The previous owner told us that there was a small problem, it would “pop back through the carb” under load. I tried lots of things and finally found the culprit. Manifold heat was so hot it would cause failure of the number 7 spark plug boot.

Why does my Chevy Silverado lose engine power?

Keep reading to find at least one possible answer to “Why is my Chevy Silverado losing power?” Read More: How Can You Tell If Your Pickup Is Overloaded? If your GM truck occasionally loses the ability to accelerate and warns you of reduced engine power, that could be caused by a faulty throttle body.

Why does my Chevy Truck start and idle?

Not sure why this test caused a better and longer gas flow than the above test of just putting the ignition in the ON position and seeing how much gas comes out of the line before the fuel filter. Last test says to start the vehicle and remove the relay.

Why is my Chevy Suburban bogging down on hard acceleration?

I have a 97 Suburban 5.7, 2wd. On hard acceleration it is bogging down like there is to much air, because sometimes it backfires. Or a plugged exhaust. I replaced the fuel pump-because it was bad in July.

Why is my truck not running when I leave work?

Truck wouldn’t stay running when leaving work today. It starts then dies after a couple of seconds. Had it towed to a friends where we pulled out the Chilton book and began troubleshooting.

What kind of car is a 1990 Chevy Silverado?

OK, so I bought a 1990 Chevy Silverado with a 5.7L (350) TBI off Craigslist. I knew I’d have to do a lot to get it into shape, but now its kicking my behind.

Why does my 1990 Chevy Silverado not start?

My 90 would not start if the vacuum line to the MAP sensor was disconnected. The MAP is located behind the TBI. Be sure the vacuum hose is in good shape. Mine has to be replaced as the glue no longer worked and it leaked. If you have a vacuum pump, make sure the MAP can hold a vacuum or it needs to be replaced.

OK, so I bought a 1990 Chevy Silverado with a 5.7L (350) TBI off Craigslist. I knew I’d have to do a lot to get it into shape, but now its kicking my behind.

What kind of fuel pump did a 1990 Chevy have?

1990 chevy k1500 truck (5.0). Power at orange wire of fuel pump relay but pump won’t run. No power to any of the other 1990 chevy: Power at orange wire of fuel pump relay but pump wont run… Got no power to the fuel pump relay. Consistent. 1990 Chevy I replaced the relay. Not getting fuel I have 8 volts at the fuel pump plug … read more

Why does my engine sputter when I accelerate?

It’s been a couple of years since I installed new plugs and wires, but due to the sudden emergence of this problem, I’m thinking that it’s the fuel pump. Any other ideas before I go pulling the tank off?

Why does my car hesitate when I hit the gas?

Whenever you took off from rest, the harder you jumped on the gas pedal the deeper and longer the hesitation. At higher revs the engine seemed to be a slightly down on power. Thinking the problem was related to vacuum, fuel delivery and improper fuel air ratio, I spent a lot of time looking at things in this area, but how completely wrong I was.

Why does my car sputter and hesitate at idle?

I thought maybe it was that Sock thing clogged thats attached to the pump causing a problem in a specific operation range. -I should note that the car is running extremely lean regardless of the pressure of fuel going in according to my wideband. It is reading 18-20 AFR at idle .

What causes engine hesitation and stumble problems on the 90 +?

Then it developed an intermittent hesitation problem- you would be cruising at 60mph, on a 400 mile trip, ease off the gas pedal, and suddenly for 1/4 second, it was as though someone had switched off the engine and then turned it back on again. The car would then run faultlessly for the rest of the trip.

Why does my car stumble when I Turn on the ignition?

3 Basic Causes of Stumble As with engines before the days of Electronic Fuel Injection (EFI), stumble had two basic causes- incorrect ignition and incorrect fuel/ air mixture for the required operating condition.

Why is my GMC Sierra 1500 stalling out?

Checked it, cleaned it off, verfied that contact wanhers are all steel and attract a magnet, reinstall the ground wire. No change. Next, read somewhere that Engine Coolant Temp Sensor if malfunctioning could cause the ECM to think the engine is at -40 deg F in dflt mode.

How to check the cold start injector resistance?

No clicking should be heard. If no clicking is heard in Step 2, a resistance check of the cold start injector should be performed. To do this, turn the ignition switch to the Off position. Disconnect the battery ground cable. Disconnect the wire harness from the cold start injector.

How does the cold start injector and time switch work?

That why we decided to show you how to test both your Cold Start Injector and your Cold Start Time Switch (this switch tells the injector when to spray that extra fuel in order to make it easier to start your vehicle on colder weather) this way you could get rid of your every morning starting problems.

Where is the cold start injector in the intake manifold?

The Cold Start Injector is the responsible for supplying more fuel into the intake manifold for an easier start on cold temperatures. It is located in the middle of the upper intake manifold plenum.

What happens when you idle the air control valve?

Normally, if you just start your car, the idle air control valve will cause the engine rpms to increase and slowly decrease. That would be a sign that your IAC is working.

Why does my Chevy C / K 1500 not start?

FYI – If the pass lock isn’t working properly, the computer will not keep the fuel pump on when the key is turned to start and released. 72 people found this helpful. Note: If the battery dies or is disconnected, or the computer is disconnected, this procedure may have to be repeated.

Why do I hear a stutter in my engine?

That means the engine will need to use more gas and your morning commute will use up more fuel than usual. Lack of proper spark timing can cause a different problem: one or more of the cylinders may misfire. That is to say combustion may be disrupted. You will feel, and maybe hear, this as a brief stutter in the engine.

How to check fuel pressure in a C / K 1500?

Get a pressure tester and check it. I have a feeling it is the fuel pressure regulator 120 people found this helpful.

What causes hesitation and stumbling in a 1990 Chevy c1500?