GMC 98 K2500 QUIT AND WILL NOT START

  • Tiny
  • gurjitsingh
  • 1998 GMC Sierra
  • 120,000 miles

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

Friday, August 24th, 2012 AT 11:41 PM

7 Answers

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

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

Was this
answer
helpful?
Yes
No
Friday, August 24th, 2012 AT 11:48 PM
  • Tiny
  • gurjitsingh
  • Member

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

Was this
answer
helpful?
Yes
No
Saturday, August 25th, 2012 AT 7:28 PM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

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

Was this
answer
helpful?
Yes
No
Saturday, August 25th, 2012 AT 8:10 PM
  • Tiny
  • gurjitsingh
  • Member

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

Was this
answer
helpful?
Yes
No
Sunday, August 26th, 2012 AT 5:17 PM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

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

Roy

Was this
answer
helpful?
Yes
No
Sunday, August 26th, 2012 AT 5:37 PM
  • Tiny
  • gurjitsingh
  • Member

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

Was this
answer
helpful?
Yes
No
Sunday, August 26th, 2012 AT 6:12 PM
  • Tiny
  • cadieman
  • Expert
  • 3,785 posts

Ck the engine timing. The timing chain maybe bad.

Was this
answer
helpful?
Yes
No
Sunday, August 26th, 2012 AT 9:28 PM

Please login or register to post a reply.

Similar Questions