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Juan Crespo
Juan Crespo, Tech Trainer
Category: Car
Satisfied Customers: 1516
Experience:  A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
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Engine stalling. 1994 Isuzu pickup with L4-2.6L engine and

Customer Question

Engine stalling. 1994 Isuzu pickup with L4-2.6L engine and automatic transmission. Truck stalls at stop lights unless put in neutral and engine revved.
Submitted: 8 months ago.
Category: Car
Expert:  Juan Crespo replied 8 months ago.

This can happen as the result of a vacuum leak, EGR valve not closing properly, or even a dirty throttle valve.

First thing you'd need to do is eliminate the obvious by conducting a thorough visual inspection of all vacuum hoses in the engine compartment. Repair or replace as necessary.

If the visual inspection did not reveal the cause of the stall, next thing you'd need to do is to spray carb or choke cleaner on and around the EGR valve and the intake manifold with the engine running at idle. You'd have found the problem if the engine smooths out while you're spraying a particular area.

Please let me know what you find.

Customer: replied 8 months ago.
tightened clamps for air intake hoses (some were loose); fixed a loose vacuum hose and removed filter top and sprayed carb cleaner into the air intake and other places you mentioned. idle did smooth out. will know more after i take the car out on the road. thnx
Expert:  Juan Crespo replied 8 months ago.

Awesome! Let me know how it behaves after the road test.

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