98 K2500 QUIT AND WILL NOT START

1998 GMC Sierra

Tiny

gurjitsingh

August, 24, 2012 AT 11:41 PM

We check the fuel pressure it's got over 55 psi and all plugs ahve spark and we check the compresin test one cylender have 30 psi every other one have 120+ it's turning over no start not quitly with starter flud any help plz change used pcm didn't help check spark plug and clean them they r geting fluded

FOUND 51577 RELATED QUESTIONS

7 Answers

Tiny

ASEMaster6371

August, 24, 2012 AT 11:48 PM

30 lbs is no good. You have a bad cylinder.
Put your old pcm back, used ones never work.

Where did you check for spark?
Roy

Tiny

gurjitsingh

August, 25, 2012 AT 7:28 PM

I check the spark at each spark plug and it's got new coil too

Tiny

ASEMaster6371

August, 25, 2012 AT 8:10 PM

It should start by what you are saying. It is difficult to see if the pcm is grounding the injectors because of the location of the injectors. A shop with a scan tool and verify if they are being triggered to supply fuel.

Roy

Tiny

gurjitsingh

August, 26, 2012 AT 5:17 PM

I know thats what I m thinking what is it wrong with it I check the injectors also have pause so I got scan tool then tell what should I check

Tiny

ASEMaster6371

August, 26, 2012 AT 5:37 PM

There are tests for the injectors that can be performed with the scan tool.

Roy

Tiny

gurjitsingh

August, 26, 2012 AT 6:12 PM

So u mean just hook the scaner and view data while turning the eng over

Tiny

cadieman

August, 26, 2012 AT 9:28 PM

Ck the engine timing. The timing chain maybe bad.

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