The lockup worked before the car was tuned, WOT will not follow shift commands...it will shift, just shifts early. The trans temp reads -40*. I replaced the trans temp "manifold" but did not fix it. The converter can be lock manually with a tech 2.

The original tune was loaded to check it, still did not work.

I have an SLP 85MM maf on the car, Ed removed a resistor from the MAF when we started tuning.

Any ideas?

David

 

It sounds like an open wire between the temp sensor and the PCM (-40F is the lowest temperature that can be reported). If the transmission temp sensor is OK, I'd be looking for an open circuit, or possibly bad PCM.

 

Vince you were dead on, I found a wire backed out of the connector at the trans, works perfect now. The ground wire.


David

 

i am having similar problems, i checked all my wires and connections, also replaced the trans temp manifold and it still reads -40 and i still have no lockup and it shifts too early at wot