Mechanics

ENGINE STALLS

1990 Oldsmobile Ciera

Engine Performance problem
1990 Oldsmobile Ciera 6 cyl Two Wheel Drive Automatic

1990 cutlass cierra with a 3.3 V6. It runs fine then will just stall. I have installed a fuel preassure gauge and it runs around 40 psi and doesnt change a bit when it quits, The car will not start and I spary a mist of starting fluid into the air intake and it fires up for a second untill it consumes the staarting fluid. This entire time the fuel preassure does not fuulter so I suspect for some reason the fuel injection system is intermittantly working. After a bit the car will start up and run fine then quit again with all the same symptoms. What would cause all the fuel injectors to worki ntermitanly?
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Pat barr
April 1, 2010.




The fact that it fires on an alternate fuel source, and has fuel pressure, narrows it down to a couple possibilities. First I would check the warm resistance of each injector, it should be around 12-13 ohms. The possibility exists that you could have one or more shorted injectors, causing the ECM driver to shut down due to excessive current. Another possibility could be a faulty ECM. There is a ground for the injectors/ecm on the transaxle stud, or a bolt to the trans case, it just states 'on a transaxle bolt'. The same fuse that powers the injectors, powers the ignition module, and it sounds like you have ignition. I don't believe the crank sensor can stop triggering the injectors, and still fire the coils.

Factoryjack
Apr 3, 2010.


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