It keeps giving the same 3 codes. map,vss,tps and i replaced all 3. still doesn't what to run.
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1991 Chevrolet S10 Question: won't stay running
Answer #1patrick mannion from Greg Solow's Engine Room, June 21, 2010, 20:57Master
MAP and TPS sensors share the same 5 volt reference signal from the computer (ECM) , have you checked for voltage at these sensors with the key on engine off sensor connection disconnected from the sensor 5 volt should be present at one wire at each sensor or you must trace the wire back to the computer and see if it is a wiring problem , computer problem or power/ ground issue.
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Replyflyingeagle1962, June 24, 2010, 18:45Rookie
I checked the wires and the voltage and all good, but when i take the tps off the tpi and hold it to full throttle and hold the vacuum line going to the map sensor it runs good. Im think it mit be the ecm or.. If you have more info.. thank you.