Anyone know how this is done? ie - make the EPC solenoid react to TPS/APPS position rather than MAF/VE?
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Anyone know how this is done? ie - make the EPC solenoid react to TPS/APPS position rather than MAF/VE?
Can't be done directly in the tune...
and I'm not sure how it would be done outside the tune...
( the PCS solenoid sinks current, this current would have to be inversely proportional to TPS voltage, you would need a voltage-to-current amplifier/op-amp circuit that maps 0.0V-5.0V TPS voltage to 1.1A-0.0A PCS current (inverse relationship) with the ability to supply upto 1.1A...
I don't know of anyone doing this for the TPS->PCS control ).
OK, so basically, my options are either dial in that MAF properly (if it is found to not be defective) and/or install a mechanical vacuum modulator in the trans and disable the PCS codes... both are do-able...