What makes a Chevy Silverado hard to start?

Even 2-3 lbs. less can cause this concern. This 5.3 engine is also known for the intake manifold gaskets leaking vacuum. This causes a hard start and also high idle in cold ambient temperatures, as well as hesitation off idle and unstable idle when engine hot.

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 did the Chevy 4.8L Vortec come out?

The 4.8 Vortec is a small-block V8 engine produced by General Motors from 1999-2013. The engines spanned from Gen III to Gen IV of the Vortec series before being phased out after 2013 in favor of the 5.3 Vortec with Active Fuel Management. The 4.8 Vortec had three different variations throughout its lifespan: LR4 (Gen III)

What should rpm be on cold start 5.3L?

Recently my 5.3L has been giving a rough idle on cold start only, no drivability issues. It starts fine, goes to 900/1000RPM as usual and after a few seconds it starts to stumble. The RPMs drop to 500 and bounces to 700 for a few seconds, 5-10 maybe.

What to do if your Silverado has a hard start?

The following diagnosis might be helpful if the vehicle exhibits the symptom (s) described in this PI. On rare occasions, some customers may experience a hard start cold, brief rough running on cold start, black exhaust color, and/or SES light. If a SES light is experienced, DTCs P0172 and/or P0175 may be stored.

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.

When to change fuels in a Chevy Silverado?

If they do switch fuels, it is recommended that they add as much fuel as possible — do not add less than 11 L (three gallons) when refueling. They should also drive the vehicle immediately after refueling for at least 7 miles (11 KM) to allow the vehicle to adapt to the change in ethanol concentration.

Why does my car stall at low rpm?

The will likely force your computer to stall the engine and only allow it to run at low RPMs, which means the car will only move at slow speeds. This is a safety feature enforced by the computer so that your engine doesn’t get too damaged.

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.

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.

Is it normal for a carburetor to hard start?

The hard starting just doesn’t seem right after sitting for only a couple of days in the garage. Thanks for the help. That isn’t a problem. It is normal. The gas evaporates from the carb, and you need to crank the engine long enough to get fuel from the gas tank which is about 15 feet away from the engine and below it.

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…

What does hard start on 98 Chevy 5.7L mean?

We can turn the key and wait for it to energize before cold starts. It sounds like the fuel pressure regulator to me. If it has to crank when cold but not when it’s warm, it sounds like it is bleeding off fuel pressure while it sits for a while. How many miles on the truck?. It sounds like the fuel pressure regulator to me.

What to do when your car engine is hard starting?

A visual inspection of all vacuum lines inside the engine bay you may discover a broken, torn or dilapidated hose that needs replacing and for harder to find leak a smoke tester can be used or when the engine is cold a can of carburetor cleaner which will cause the engine to idle normal or speed up for a brief period.

Is the 1998 Chevy Silverado 5.7L hard to start?

Hello all, My 1998 chevy silverado 5.7L Vortec used to start as soon as you bump the key, and now it is hard to start (mainly when its cold) it takes several cranks of the engine to start and after truck warms up its okay, usually in the morning or if the truck sits for several hours after running. (i.e.

What happens to my Chey when the engine is cold?

2003 Chey. When engine is cold engine starts and runs just great. Only when engine is starting. After starting it runs a little rough but then it runs fine. When I shut it off I can

What kind of engine does a 2003 Silverado have?

Here’s the kicker…..I put the new one in and the truck started right up and we thought it was fixed, my son drove the truck and it ran fine, but when he returned home, it wouldn’t keep running after he would try to start it again, no matter how many times we tried.

What should I do if my Silverado engine dies?

Update as of today: 1) the truck hasn’t started and kept running since last week. It only starts right up, then dies immediately. 2) I got a fuel pressure tester and the pressure is at 53 with key on, and maintains pressure when it starts (then dies).

What causes a Chevy Silverado 1500 to hard start?

As it warms up the idle air control adjusts to this vacuum leak and when the key is off the idle air control resets itself causing a hard start up due to the vacuum leak not being compensated for. Just a possibility 16 people found this helpful. K6, see what I mean by listen to John?

Are there any problems with the Chevy 4.8L Vortec?

The two engines tend to have similar problems, but the 4.8 Vortec comes in at a higher reliability rating on our scale due to its lack of AFM, which is known to cause problems on just about every engine it touches. 1. Intake Knock Sensor – 4.8L Vortec

Can a faulty knock sensor cause a 4.8L Vortec to go bad?

On the 4.8 Vortec, the knock sensor is known to go bad or become faulty and throw check engine lights. When you have a faulty knock sensor, the engine thinks it needs to alter timing despite there being no timing issues, which can lead to a number of performance issues. 4.8L Vortec Faulty Knock Sensor Symptoms

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

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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…

Why does my 2000 Chevy Silverado not start?

Question: My 2000 Chevy Silverado that will not start unless i pour gas in the throttle body. It has been sitting for about 8 months and prior to that there was no problems at all. I have good fuel pressure with no bleed down. Answer: Does it start after pouring gas in throttle and keep running fine? What is the fuel pressure?

What makes a Chevy Silverado hard to start?