TPS won't set a code most times. Theres a intermittant open circuit
in it. On Fords this drives the ECM crazy. How to. Get known good unit
and swap. Take ground off BATT. Wait 1/2 hour for capacitors in ECM to
leak down. Hook cable up & start. Walk away from it and get a cup of coffee.
It'll run really bad till it relearns. After it straightens out, take it out
and drive it like you stole it. The "relearn" part is important. The ECM
learned how to run poorly, and it will keep doing it unless you clear it's memory.
Coogs
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