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2003 Buick Park Avenue Question: throwing random misfire,cat,long shift,incorrect gear ratio, and fuel level

 

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Holly H, 3.8L V6 Supercharged, Dracut, MA, March 26, 2013, 22:49
 Rookie

sensor codes also air ride has the rear suspension all the way up.have replace the cat, the O2 sensors, plugs, wires coil packs, ignition mod, EGR valve, intake gaskets, fuel filter, serviced tranny... at a loss.. when the engine is running smooth,the car shifts smoothly, when it runs rough, it doesn't want to shift and when it does it slams into gear.. could the main computer be the problem and if so is there a way to test it?

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  • Answer #1

    Greg's Orange Auto (14224 Answers) , Orange, CA - (714) 361-9386
    globalhelper March 27, 2013, 05:48
     Master

    sounds like you need to quit throwing parts at it and get a diag from a good tech to get the car repaired.codes don't mean repl parts,its telling you there is a circuit issue. good luck

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