1995 GMC Jimmy engine shakes and stalls

1995 GMC JIMMY
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JERONIDE
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Engine Performance problem
1995 GMC Jimmy 6 cyl Four Wheel Drive Automatic

After 5 minutes of the car being on the car starts to shake and stalls.
the following parts were already changed.
1- spark plugs and cables
2- cap and rotor
3- fuel filter and
4- spider ingector.

there is spark in all 6 cylinder, the ignition system is working but when i checked fuel pressure it was at
50 lbs but the pressure was shaking and going down to 25 lbs within 5 minutes then the car shuts down.

can it be the fuel pump also needs to be changed??

also is the spider injector syncronize or do they all fire at the same time???
Jul 10, 2009 at 9:21 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Have you checked the fuel pressure regulator? If so and it was good, I would say chances are the pump is going bad. If it drops to 25psi after 5 minutes and you checked and there are no leaks, that is where I would start. Also, they are syncronized.

Let me know about the regulator.
Jul 10, 2009 at 11:13 PM
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