Question about 1994 Oldsmobile Ninety Eight

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Car frequently dies while driving.

The dealer is unable to determine what is defective. Their research indicates it may be a faulty computer, power train control module or a defective ignition module

They replaced the crank shaft sensor. But it did not correct the problem.

Both repairs are expensive for a car that is 14 years old and I would like to obtain your opinions regarding the most economical and efficient remedy.

Please advise.

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  • Anonymous Aug 17, 2008

    I have the same problem. Check engine light usually goes on but turns back off after car is stopped and restarted.
    Another problem is the brakes seem to slip when almost stopped and then grab with a lurch. This seems to happen less when I turn off the Traction control.


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Ignition module under coil pack happens in alot of cars engines gets to operating temp or module get hot car shuts off after a min or two car will restart vary agervating problem but easy to fix

Posted on Oct 08, 2008

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Hi,sorry i was not able to find any other Fixya experts to help with your problem, but I can offer some other generic faults which would cause the symptom you describe.
Most modern cars which use electronic fuel injection and ignition have basically the same components so here we go..

1) Fuel pressure, the fuel pump can cause intermittent shut down of engine as this unit works with mostly unfiltered fuel.
Try starting engine and closely listen to pump which is fitted inside fuel tank, if you here loud humming, this is usually a sign that the pump is not 100% and may suddenly seize, cool down and start running again...can be a little tricky to check, also if you can drive vehicle and fault occurs, fuel pump will only run while engine is running and also approx 10 seconds after ignition is turned on, so you will probably need some else to switch ignition on while you listen.
2) Air flow and throttle position sensors are very hard working components of the injection system, the problem is that they are very difficult to diagnose particularly with the limited information I have to work with in this situation.
3) Ignition system has computer, crack angle sensor and many other too many to mention, but I have found the most common is coil pack/s or ignition power supply solenoid.(The one that clicks in engine bay when ignition switch is turned to the "on" postion.
P.S If you can forward a more detailed descrition of what happens when the vehicles fails maybe I could shed more light on the matter.
Regards MMP

Posted on Aug 05, 2008

  • abdoel faisel
    abdoel faisel Feb 06, 2014

    thanks ,when engine is cooled down it will start right away and you can drive like 30 -45 minutes ,temperature will be normal at gauges ,and will shut down ,i've checked on my watch and have to wait for an hour and will start ,i've also checked on the fuel pressure valve if gas is pumping when it shuts down ,it 's pumping gas normal to the injectors ,i thought the solution was to replace the crank shaft sensor ,but i was mistaken

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