04 gto tps and miss fire codes after tune

[sdvette]

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.

[kevmar]

helps to know whats done to car and post up tune or log of said.

[sdvette]

zo6 heads decked and a 238/244 cam, headers ect dont have log right now will have soon. thanks

[Chris@HPTuners]

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.

[sdvette]

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

[Chris@HPTuners]

yes, both can be found under Engine Diagnostics. The TPS check are the P0121 Error Max/Min MAP values.