What makes a Chevy Silverado hard start when hot?

When hot it won’t start til it cranks long enough to get 30 lbs. of pressure or so. When cold it gets to that pressure right away and starts. I bypassed the oil pressure sending unit with a push button. When the button is pushed, the sending unit is bypassed.

Is the 1998 K 1500 hard to start?

Not open for further replies. i am working on a 1998 k 1500 5.7 the truck is very hard to start but when it does it runs fine.. good power and will start fine afterwards,,the problem i am having is when it sits for 2 days then once again it is very hard to start…

How long does it take to fire a hard start Chevy?

Good Morning island auto, well your mention of that kind of pressure does sound a bit high, but the gauge you are using may have an error, generally even if the fuel did drain back to the tank it only takes a few seconds to be replenished and even if the system contains air, I would expect some firing to happen initially.

What causes a car to have a hard start?

As mentioned previously on this site, some people have experienced where only 5 to 10 PSI low caused starting problems on higher pressure systems. But this problem clears when the vehicle has been run, so that makes that kind of thing less probable.

What makes an ignition system hard to start?

Saltiness and high humidity can be interesting together and have odd effects with ignition systems in some locations where moisture is attracted to crystalline material and is highly conductive but when dried loses that effect. Have you tried spraying all the ignition components with a moisture inhibiting substance.

What to do if your Chevy Silverado won’t start?

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Is there a problem with my Chevy Silverado?

Cold Hard CHEVY Start Problem Solved! Chevrolet Silverado Express Suburban Tahoe GMC – YouTube Cold Hard CHEVY Start Problem Solved! Chevrolet Silverado Express Suburban Tahoe GMC If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations.

How many miles does a 1999 Chevy Silverado have?

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. I have a 1999 Chevy Ext Cab Silverado PU, with the 5.3L. It’s approaching 118,000 miles and has always been well maintained.

When does a Chevy Silverado pickup start cold?

MY SILVERADO PICKUP STARTS GREAT WHEN COLD BUT WILL NOT START WITH OUT CRANKING FOR PROBABLY AROUND 6 SECONDS. SOMETIMES MORE AND SOMETIMES LESS. IT WILL START BACK UP EASILY RIGHT AFTER YOU SHUT IT OFF BUT ABOUT 5 MINUTES LATER IT WILL NOT START VERY WELL. MY CRUISE QUIT ALSO, DON’T KNOW IF IT HAS ANYTHING TO DO WITH IT.

When to use the cold start injector in a car?

The cold start injector is there to enrich the fuel mixture of the vehicle during low temperature conditions, such as during cold starts or in cold weather.

What causes a Chevy pickup to hard start?

If after you have circled the key a few time the engine starts normally then you now know for sure you have a fuel pressure leak down problem causing your hard start. If this video was helpful please help support my youtube channel by subscribing here: https://www.youtube.com/channel/UChCX…

A weak coil or bad coil wire, a bad pick up coil or crank sensor or a bad rotor can all cause a change in the spark. If you know when it will not immediately start, try spraying carb cleaner or starting fluid in the duct that carries air to the air filter.

What’s the best time to start a Chevy Silverado?

Why is my Chevelle 350 hard to start?

Fuel pump check valve doesn’t maintain pressure in the fuel rail so it boils and then you have to crank excessively to get rid of the vapor before it will start. Bought a 1972 Chevelle 350 a couple years ago. Every time I drove it it wouldn’t restart easily or sometimes not at all unless I waited a while.

Why does my car not start after warm?

Car will sometimes not start after warm. When i start my car, for the first time during the day- I have no problem. When I go somewhere and shut it off, sometimes it won’t resatrt. It doesn’t seem to matter what the weather is outside, it just does it when it feels like it.

What causes engine to crank for long time before it starts?

When an engine cranks for a long time before it starts, either spark or fuel is missing or weak and each has its own reasons. Most of the time, the air / fuel mixture has been disturbed and there is too much air or not enough fuel.

Why does my Monte Carlo engine start so slow?

If by adding “fuel” the engine always starts faster and cranks over less, then you will know it’s a fuel delivery problem and can pass on to your tech, the process you used and the results. 82 Monte Carlo SC, 355 w/Vortec heads, roller rockers, 625 Demon Carb, TRUE DUALS.

What’s the long cranking time on a 2006 suburban?

Post: Long cranking time. Hard start (Topic#230127) 2006 Suburban 5.3 turns over awhile before starting up. Runs fine once started. I do not see a fuel pressure regulator nor do I see one listed at Rock auto parts.

Why does my truck won’t start when hot?

The idea is to avoid stranding you in the middle of nowhere because your air flow sensor plug came loose. So, what’s happening is you are throwing the truck into limp home mode by pulling the airflow sensor out of the circuit. Naturally, it starts. That’s what it’s supposed to do.

Why does my 2.7L engine not start when hot?

I honestly have this exact same problem with my 2.7L. I can guarantee that something is becoming heat soaked when the engine sits for 5-25mins after being at operating temp.

Why does my Silverado 1500 engine not start?

Restarting the engine from this state may be difficult. The fuel can vaporise due to being heated by the engine, by the local climate or due to a lower boiling point at high altitude. A vapor lock is more likely to develop when the vehicle is in traffic because the under-hood temperature tends to rise.

Why does my GMC Sierra stall at 30 mph?

Never threw a service engine light or a code and would readily re start. 2 weeks ago it quit at 30 mph, wouldn’t restart and SES lit up. Code indicated crank positioning sensor. Had it replaced and so far so good. If yours behaves as mine did it could be a while before you get a traceable code. I own a 1998 GM Sierra 5.7L 2wd automatic.

What happens to coolant temp sensor when engine warms up?

As the engine warms up, the coolant starts to heat up, which in turn causes the coolant temp sensor’s resistance to decrease. This decreasing resistance now lets more of the 5 Volts to pass thru’ the sensor onto Ground. The PCM is able to sense this lower voltage drop and translates the numbers as a higher temperature.

Why does my GMC engine start but not run?

Repair guides and support for cars, trucks, and SUVs manufactured by GMC. Answered! View the answer I have this problem too Is this a good question? An engine will start but not run when the fuel runs out .

What kind of car is a GMC Sierra?

I have a 5.7L 1500 GMC Sierra that has lately decided to strand me at random locations throughout my hometown. I get in in the morning, crank, and it goes.

How to troubleshoot a temperature gauge in a car?

Temperature gauge troubleshooting begins with isolating the problem either to the gauge, sending unit, fuse or wiring. As with any electrical troubleshooting it is best to check all wiring connections are clean, tight and free of corrosion. The following process must be preformed with the ignition key turned to the “on” position.

Why is my car engine hard to start?

The starter itself may not be cranking correctly due to the heat impacting the relays which drive the mechanisms (this was a common issue in old air cooled VWs, and with how some newer engines are crammed into engine bays similar things can happen).

What’s the idle RPM on a 99 Vortec?

Truck recently had an exhaust manifold replaced. When its cold (as in first thing in the morning), it fires right up and high-idles for a few seconds and runs fine. After the first few seconds, its idles rough. The engine struggles to keep it above 7-800 RPM.

Is it hard to start a Vortec at idle?

When its in gear at idle (like a stop light), it struggles to stay above 500 RPM, and will occasionally stall. On any start after the initial cold start in the morning, it is hard starting. You have to feather the gas a little and it shudders but it will start then you have to give it a little gas or it’ll stall.

Why is my 7.4 Vortec rough idle leaking fuel?

Get a scanner on it and check the LTFT’s. If they’re pegged at +25 then the FP regulator is leaking. Very very common issue on the 7.4’s. If you don’t have scanner access connect a FP gauge, cycle the fuel pump a couple times and then watch the gauge for drop off.

What makes a Chevy Silverado hard start when hot?