Question about 1999 GMC Jimmy

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I have a 1999 GMC Sierra. wont start. Turns over tries to start but wont stay running. The fuel pressure is fin and all fuses are good.

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  • GMC Master
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Technically if you have spark and enough fuel pressure it should run.
What is the fuel pressure at the rail ?
Have you checked the cap and rotor ?

Posted on Dec 12, 2012

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6ya6ya
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Posted on Jan 02, 2017

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dennymulford
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SOURCE: 1998 GMC Sierra- runs rough then stalls when

had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!

Posted on Jun 06, 2009

honeymokey
  • 3113 Answers

SOURCE: My 1999 GMC Sierra wont start. It has the 5.3l V8

Sounds like a security problem that is preventing starting. It will run for a few seconds and then die.

Posted on Jun 09, 2009

  • 148 Answers

SOURCE: 96 gmc sierra hard to crank after 12-14 hours

that has a votec engine in it the fuel pressure is droping at knight and it takes 60 psi before the injectors will fire most likely cause fuel pump ,leaking injector ,or a feul pressure regulator

Posted on Jul 14, 2009

  • 10 Answers

SOURCE: fuel pump fuse located on 1997 gmc sierra

The fuse is actually a Relay Switch and its located in the Fuse Relay Center on the driverside of the engine compartment. The Black Box is labled Fuse Relay Center, the diagram on the cap displays which Relay is the Fuel Pump relay...the Relay switch is usually $8-$15 depending on where you shop

Posted on Jul 28, 2009

  • 2 Answers

SOURCE: I have a 1988 GMC Sierra 1500 that wont stay running

1988 gmc runs for a little but dies. Check your c.t.s that checks the temp. of your coolent and when it fails it tells computor engin is hot, t.p.s takes over closes butterfly and chocks the air to keep engine from runnin to lean. If engine is not hot it will flood and stop runnin then some time will go by befor truck tries to start. May not be probablem but its a thought. c.t.s is located on manifold by top radiator hose neck. My truck was fine than sat had simmilor problem when i went to use again thats what i changed and seems to be back to normal. Hope this helps.

Posted on Sep 08, 2009

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1 Answer

Truck wont start easily after sitting for a few hours.turns over good new plugs wires and fuel filter.


Hi. Well, without additional information, I would have to throw in my best guess. So, I would check your fuel pressure. If it is low, you have a defective fuel pump. If this is not the problem, please repost with addtional information about the problem.

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Sounds like a security problem that is preventing starting. It will run for a few seconds and then die.

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I have a 1988 GMC Sierra 1500 thast wont stay running


Use a gage and check proper fuel pressure. With tbi fuel injection, the fuel pressure is 9--13 psi. I have seen fuel injector spray pattern that looked good to me, but, the fuel pressure was half of what it should have been. 5 psi may show a good spray pattern, but, it won't start and run a v8. In my opinion.
Any applicable trouble codes? Your obd1, you should be able to check some codes yourself, if there are any.

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