Question about 1993 Plymouth Sundance

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I have a 93 Plymouth Sundance that has been running good until just a few days ago. When I now start it up, when stepping on the gas to head down the road, I can hold the pedal to the floor and it will barely get up to 15 mph, struggling to get there. Once it does and I attempt to increase my speed, at about 35 MPH it starts to cut out and almost dies. Someone said my thermostat could be stuck open, or my catalytic converter plugged. Any suggestions please? It was a great work car until this started.

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  • Anonymous May 11, 2010

    This sounds like it could be a fuel problem to me - as in starved for. Does it even out when you come off the gas?

  • Dave  C
    Dave C May 11, 2010

    It does sound like a plugged catalytic converter, try taking the O2 sensor out, the reduced restriction ahead of the cat will give you more power if it is plugged but it will be noisy while you do this test.

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Start with cycling your key, on ,off, on, off, on, leave on (not start)and count if check engine light flashes. For example: flash,flash,pause, then 2 more flashes is code 22. 3 flashes, pause then 3 more, is code 33 etc... Code 55 is end of message. Get back to us if you get any.

Posted on Jun 05, 2009

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