Vapor Management Valve.
OBTW, I had to look it up myself. I have always called it an Evaporative purge valve.
Really all you have to do is remove and plug the vacuum line going to the Evap charcoal canister. The line is attached to the base of the throttle body pointing to the rear of the firewall (on my 2000). The vacuum line runs into the fender well to the rear of the car.
What we are trying to determine if this is the source of the extra air. If the idle speed drops to more normal levels, this will tell us were to look next.
BTW, the 1996-1998's have a separate valve and flow sensor. They fail quite often. IMO, this is a long shot because I would have also expected other DTC's.
Congats on passing the exam! That is great news.
>>Testing the TPS for fast idle concerns:
Fast idle concerns:
Key on, engine off, monitor TP MODE PID while wiggling TP sensor circuits. TP MODE PID can also be monitored during vehicle drive. With throttle closed, TP MODE PID must be C/T (closed throttle).
TP Mode PID is not C/T with throttle closed:
Note: At vehicle start, the TPREL will begin at about 1.25 volts, and count down to the lowest TP V value seen since engine start. If the TP V value goes below the "normal" range, then increases again, TPREL will set to the lower voltage. If TP V is about 0.04 volts greater than the TPREL value at closed throttle, the PCM will go into part throttle mode.
Monitor TP V and TPREL PIDs for sudden changes while checking for intermittent TP circuit/connector concerns. Also check for loose/worn throttle plates. If no concern is found, GO to Z1 in Section 5.