My TPS is fluctuating from .30-.46. My voltage and PU as also fluctuating (volts 11.6-12.2). The fluctuations are pretty fast 2-3 per second. this is with the key 0n - motor off. TPS also fluctuates the same with the motor running. I disconnected the wires to the alternator thinking that I could possibly be a bad voltage regulator. No change with key on. I did start the car to see if it made a difference. I also hooked up the power logger to see if I had the same readings (making sure the scanner is not bad). Same readings. Installed a new TPS - same fluctuations. Swapped out chips in the ECM - no change. Bad ECM?
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