having some issues with a '98 chevy s10.

Asked by Jan 18, 2011 at 04:33 PM about the 1998 Chevrolet S-10 2 Dr STD Standard Cab SB

Question type: Maintenance & Repair

hooked a computer up to it and got MAQ/BARO circuit high input, (pending).
TPS/PEDAL position sensor A circuit low input
02 sensor heater circuit malfunction (bank 1 sensor 2, pending)
Multiple/Random cylinder misfire detected (pending)

it's hard to get the truck to start, and when it does start it idles really rough.. any idea what needs to be replaced? i was gone for 6 months and no one was there to start my truck in my absence.. 6 months without starting ended badly..

4 Answers


You should run it with fresh fuel after deleting the codes in the system via the scan tool or even disconnecting the battery. Also, where was it stored? If it was somewhere an animal couldve gotten to it and gnarred on some wires that could be your issue. Do a thorough visual inspection of the engine harness. I would start there.

it was in my front yard, squirrles nested in it and chewed through some wires, already inspected it all and fixed the messed up wires.. any other ideas? because i've put fresh gas, new gas pump and new gas filter.


After resetting the codes, all of those come back when the key is cycled? Have you tried any cleaners like seafoam or a three part fuel system cleaner?


If the battery was hooked up when your furry friends chewed on the wires it could of shorted the PCM. If possible change the PCM (the boxes on the fender well)and check that all the damaged wires were repaired. I wouldn't go buy a new PCM but if you could hook up another one that would eliminate that possibility.

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