1991 Isuzu Trooper Startup

1991 ISUZU TROOPER
187,000 MILES • 2.8L • V6 • 4WD • MANUAL
Avatar
AVIGERMAN
  • MEMBER
  • 2 POSTS
In the morning when I cold start my car runs at 400 rpm until war. When I start it and its warm it stumbles and dies unless I give it some gas then it runs fine. I've recently done a tune up new coil new egr and cleaned the idle air control valve and throttle body.
Jun 24, 2015 at 7:08 PM
Advertisement
Avatar
ED-WEEZY21
  • ✓ASE Certified Mechanic
  • 248 POSTS
  • ASE Certified Mechanic
It sounds like you may have a fuel problem. I would test for proper fuel pressure at the fuel rail. From what I can gather on your vehicle, it should be between 9 to 13 psi. Im not 100% on this specification since my information on this vehicle is very limited. I would also check the fuel filter to see if there is any contamination and replace if it looks clogged. If this has never been replaced, I would replace it anyways due to it being a maintenance item. Lets start here for now.
Jun 25, 2015 at 5:49 PM
Avatar
AVIGERMAN
  • MEMBER
  • 2 POSTS
I replaced the fuel filter yesterday and no change I was thinking fuel pressure regulator maybe??

Jun 25, 2015 at 6:19 PM
Avatar
ED-WEEZY21
  • ✓ASE Certified Mechanic
  • 248 POSTS
  • ASE Certified Mechanic
I would still test the fuel pressure to see what its at. It could be the fuel pump as well not producing enough pressure or it could be what you stated, the fuel pressure regulator. I would also inspect the fuel injectors for any contamination and make sure there isn't any fuel getting by the injector seals.
Jun 25, 2015 at 7:39 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.