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1999 Chevy truck 5.7 starts but wont stay running fuel pump checks fine what is the cause of this?
Wiki User
∙ 12y ago
check your injector and the O ring that goes around the injector. You will need a star bit or a hex bit, mid size to remove the injector, it just pulls out. and unplugs, check for carbon build-up (black residue) and take the O ring off and examine it. This truck has a sensor that tells how much fuel to dispense, if the O ring is damaged, or the injector is clogged by carbon deposits, it may be sending too much or (if O ring is damaged) or not enough, (if build up has it clogged) fuel and then the truck may not stay running, the proper amount of fuel needs to be dispensed to keep it running. You can clean the injector with gasoline and a tooth brush, don't assume it is bad and needs replaced. You can buy the O ring a any hard ware store for about 12cents. This is very common in Chevy trucks from 1990-1999. I had to replace my O ring in my s-14 about 3 times. but 36 cents was better than *80.00 for a new injector, check it out
Wiki User
∙ 12y ago
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