Originally Posted by
TheOtherDave™
At what point did this turn into a "Diagnose your Check Engine Light here thread" ? :shake:
I guess if the OP has left, there's no harm in it... but I hope we're not on a path toward derailing every single thread in here. :hsugh:
QuikSilver: Remove the IACV and clean it. The valve may be sticking and causing the ECU to freak out because of the reading coming off of the MAP sensor. Lastly, reset the ECU by disconnecting power for 10 minutes (but be sure you have your OEM radio anti-theft code on hand before doing so)
Try2Live4God: The short answer is that the ECU believes that there is a leak in the plumbing that draws fuel vapor from the gas tank to the evaporative emissions canister under the hood.
The way it came to that conclusion is rather complex; when I can get home to my HELMS manual, I'll post the diagnostic flowchart for you.