Question about 1989 Chevrolet Cavalier

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1989 Cavalier Z24 Stalling problem

Car stalls after being driven for a few minutes (about 2 miles). Car only stalls when idling in gear, not when it is in park or neutral. Rough idle in neutral or park, but no stalling. May have sparkplug misfire.

Replaced fuel filter, fuel injectors, computer, EGR valve mount gasket, throttle body mount gasket, upper intake manifold gaskets (between plenum and manifold), spark plugs, spark plug wires, cold air intake hose (underside was shredded by the throttle body port).

Old injectors had crud all over the nozzles and one of them had a large brown spot on the side of the injector body. Throttle body gasket came off in two pieces. Fuel rail looked clean and had good fuel flow. Spark plugs didn't have any residue on them when I pulled the old ones. Computer isn't showing any error codes and no check engine light.

Any assistance would be greatly appreciated as I'm pulling my hair out over this one.

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  • chapkom Jul 18, 2009

    Just replaced the torque converter lockup solenoid to no effect.

    Running out of ideas.

  • chapkom Jul 20, 2009

    Just replaced the Oxygen Sensor. Had a solid coating of carbon on it. Car is surging a little less, but still stalling.

  • chapkom Jul 25, 2009

    Replaced idle air control valve and throttle position sensor. Stalling problem has been eliminated but still getting some surging at 40 and 50 mph. May need a new torque bolt for TPS since one appears to have been stripped. Thanks to NHRA21 for trying to help.

  • chapkom Aug 02, 2009

    *** SOLVED *** My coil pack for cylinders 2 and 5 had a split in the side and my ICM had sand in the contacts. Replaced the ICM and all three coil packs and she runs like the day she rolled off the lot now.

  • chapkom Aug 02, 2009

    *** SOLVED *** My coil pack for cylinders 2 and 5 had a split in the side and my ICM had sand in the contacts. Replaced the ICM and all three coil packs and she runs like the day she rolled off the lot now.

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Have you heard of Noid lights? You unplug the fuel injector and plug these in and they will light up if the injector is getting power. This might give you a better hint. There are also lights that go inbetween the spark plug and wire. Between these two items you may be able to narrow down the problem to a specific system. I believe that your car has a coil pack. Some of these engines have problems with the crank trigger. I believe it is located on the back side of the motor. If you decide to change it, be careful. I have heard of them breaking into two pieces and becoming a big problem.

Posted on Jul 21, 2009

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