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1990Isuzu Trooper dies randomly when warm
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friedemann
New User
Apr 11, 2010, 1:18 PM
Post #1 of 3
(2071 views)
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1990Isuzu Trooper dies randomly when warm
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Problem is fuel delivery.IMHO Pump was just changed 2 years ago for $5oo. Don't want to go there again if I can avoid it(especially if that is not where I should be looking) spark and everything else seems good. However car will occasionaly drop its idle very low (for an automatic) and then stall out. Or on the highway it will starve and die if the engine revs to high (like the speed limit of 60mph) Or it will not start if I stop at a Starbucks for a coffee for 10 minutes after driving it 5 miles to get there. A friend took off the air cleaner and put some fuel down the "throttle body" and I cranked it and it fired up and I was able to keep it going for a while while the revs remained in the middle zone(like driving 30MPH while in drive) - Now is it the fuel pump again? - Or possibly a tube that connects to the top of the fuel tank to relieve negative pressure so that the tank does not collaspe inward.? - Or possibly something in the Thottle Body Injection I can check? to make sure all is good there? The fuel filter to the engine compartment is seemingly clean.(as it is a clear plastic unit.) I "have noted" that the fuel cap was not stock. Air cleaner is clean.
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nickwarner
Veteran
/ Moderator
Apr 11, 2010, 2:06 PM
Post #2 of 3
(2066 views)
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Re: 1990Isuzu Trooper dies randomly when warm
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You'll need to do some testing when this is happening. If you are suspecting fuel vapor lock, take off the cap when it won't start and see if you get a lot of vapors coming out. Also, if you think its got low fuel pressure you need to verify this with a pressure reading. Post back with results and we can go from there
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