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Potential Tuner
04 gto tps and miss fire codes after tune
04 gto professionaly tuned 20 miles after leaving tuner tps and ramdon missfire codes came on. cleared then and they came back, checked the tps its good. really think its in the tune can anbody help.
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Advanced Tuner
helps to know whats done to car and post up tune or log of said.
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Potential Tuner
zo6 heads decked and a 238/244 cam, headers ect dont have log right now will have soon. thanks
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HP Tuners Owner
its the camshaft, the lope causes the expected crankshaft motion to be outside the limits of the misfire checks. The PCM uses the crankshaft motion & acceleration after each firing event to decide if a misfire has occured.
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Potential Tuner
i use the same cam in c-5 vettes and dont get the missfire codes, what about the tps code, any way to trick the computer so the check engine light goes out
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HP Tuners Owner
yes, both can be found under Engine Diagnostics. The TPS check are the P0121 Error Max/Min MAP values.