Reduced engine power QUICK QUESTIONS
Thread Starter
Instructor
Joined: Nov 2004
Posts: 112
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Reduced engine power QUICK QUESTIONS
well my car has been plagued with the reduced engine power for about 3 months now, and i cant seem to find the time to work on it... but the state wants my tag in about 30 days if i dont get it inspected so its time to get this figured out.... the car WAS throwing every code known to man, but i reset the comp... car ran good for 1/2 mile then started again. codes NOW thrown are
p1220hc
p1221hc
p1515hc
p1571h
so i guess this means somthing wrong with the throttle position crap... should i just go buy a new throttle body?? or what yall think i should do????
thanx!
mike
p1220hc
p1221hc
p1515hc
p1571h
so i guess this means somthing wrong with the throttle position crap... should i just go buy a new throttle body?? or what yall think i should do????
thanx!
mike
Racer
Joined: Dec 2005
Posts: 407
Likes: 2
From: Mesquite, Texas
Look for bad grounds, water-damaged connectors at the TAC module, and possibly a chafed wire harness at the rear of the left cylinder bank, as it passes around the bracket that's back there. I too had the same problem, and after two trips to the dealer with no results, I dug into it myself. Pulled the battery, inspected for the dreaded acid leakage, but found no evidence. Opened up the passenger side wheelhouse access to the TAC and PCM modules, and found a severely pinched and nicked ground wire. Spliced in a new piece, reconnected to the ground stud under the battery, and problem hasn't happened for over 4 months now. It was so bad prior to doing this that it was happening almost every time I drove it.
Thread Starter
Instructor
Joined: Nov 2004
Posts: 112
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sounds good, so the TAC error code that it is throwing is for the tac in the pass. foot well?? or is it for the tb as well, and the sensor at your gas pedal?? is there any way of pinpointing just a little bit better of where the problem is originating from...
thanx in advance
mike
thanx in advance
mike
Thread Starter
Instructor
Joined: Nov 2004
Posts: 112
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Originally Posted by mrC5er
Look for bad grounds, water-damaged connectors at the TAC module, and possibly a chafed wire harness at the rear of the left cylinder bank, as it passes around the bracket that's back there. I too had the same problem, and after two trips to the dealer with no results, I dug into it myself. Pulled the battery, inspected for the dreaded acid leakage, but found no evidence. Opened up the passenger side wheelhouse access to the TAC and PCM modules, and found a severely pinched and nicked ground wire. Spliced in a new piece, reconnected to the ground stud under the battery, and problem hasn't happened for over 4 months now. It was so bad prior to doing this that it was happening almost every time I drove it.
mine is so bad that i cant even get up to the dealer... it wasnt gradual either, when it started, it just started full steam, now everytime i let the car sit for a while it will crank fine, but .5 mile later.... BAM
mike
