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Old 12-04-2012, 07:33 PM
mrhp mrhp is offline
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Either I.A.C. valve or T.P.S. Both commonly fail and would give you that drivability concern. Remove and clean I.A.C. and see if problem gets better/worse. Usually an I.A.C. valve will act up upon first start of the morning, but not always. On the T.P.S. backprobe the 3 wires going to it. One is ground( black I think) the 5 volt reference is ( orange I think) and the return sensing wire is green, I think. With the key on engine off, backprobe the green wire with the throttle at idle. Should be around 1 volt. Slowly have someone step on the throttle and you will see the voltage climb to appx. 5 volt at W.O.T. If the voltage increases cleanly with no drop-out or spiking, it is O.K. My money is on the I.A.C.
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