Question about 1994 Chevrolet S-10

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94 s10 2.2 4cyl rwd. It starts but runs very rough and rich. sometimes it will come out of it as you drive but not always. Sometimes it will start and run fine. i have dtc codes 32,33 and 54. The map sensor has been replaced

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Have you done the routine tune-up items; air and fuel filter, plugs, plug wires? Not sure if this has a distributor cap or a coil pack, check all your basic stuff first. Go to Autozone and have your codes read. It is free.

Posted on Nov 08, 2014

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32 and 33 point towards a MAP sensor problem. They are affordable enough and easy enough to replace that it wouldn't hurt to replace it and clear the codes.

Posted on Nov 08, 2014

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