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Problems starting

Problems starting

(1999 GMC K1500)
My son has a 1999 GMC Sierra K1500 SLE 5.7 and he has been having problems with it starting. It will crank but not start. If he waits a few minutes and tries again it will start. We changed the spark plugs and wires to see if that was causing it but it is still doing it. I don’t want to spend a lot of money on trial and error if any of you have seen this issue
Tags: gmc, k1500
2 answers & 2 comments
Popular Answer
on October 17, 2019

Fuel pressure MINIMUM is 50 psi when key is turned to the ON position... 49 psi and the engine will not start! ... Easy to test fuel pressure using a test gauge from auto parts store..

The reason the engine eventually starts is each time you crank the engine a little fuel gets injected into the cylinders - just not enough on the first attempt.

You might as well figure on removing the truck bed and installing a new fuel pump module.

Good luck!
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on October 17, 2019

BTW - yes I know the truck runs great now after it finally starts - but that will soon come to pass once the pump finally fails all together..

Try replacing the fuel FILTER first - however I suspect lazy / failing fuel pump is the culprit.

Happy motoring.
General Diagnosis
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on October 17, 2019

Fuel pressure MINIMUM is 50 psi when key is turned to the ON position... 49 psi and the engine will not start! ... Easy to test fuel pressure using a test gauge from auto parts store..

The reason the engine eventually starts is each time you crank the engine a little fuel gets injected into the cylinders - just not enough on the first attempt.

You might as well figure on removing the truck bed and installing a new fuel pump module.

Good luck!
Sign in to reply
on October 17, 2019

BTW - yes I know the truck runs great now after it finally starts - but that will soon come to pass once the pump finally fails all together..

Try replacing the fuel FILTER first - however I suspect lazy / failing fuel pump is the culprit.

Happy motoring.
on October 17, 2019
Check for codes and fuel pressure and report back. We need more info.
Use this link to find a good shop near you.
https://repairpal.com/repair-shops
Alex
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on October 17, 2019
There are no codes

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