Question about 2003 Cadillac Deville

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Ok I have a 99 catera it will start runs ruff until it warms up, then runs idle ,no problem,but when you push the gas it runs like ----!! changed one o2sensor already no change. used OBD II on it as well to me it sounds like fuel starved or plugs and wires maybe?? help please

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Did you have the battery disconnected from the car?
I had a similar problem. The TPS (Throttle Position Sensor) loses the home position.

The manual says to place the ignition in run; ignition on for 3 minutes (connect a battery charger while you do this) without engine running. It should home the TPS.
Worked for me.

Posted on Oct 06, 2009

  • Lorenzo Lamanna Aug 10, 2010

    Also check the MAF (Mass air flow sensor). Unplug it, if it runs better, you need a new maf.
    Catera is one of very few cars that will run without maf connected.


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