First of all I have a stock motor with a non intercooled Vortech setup in a 156k mile untouched motor.
My problem:
Strange higher idle, although it will occasionally idle down to normal (750)ish rpms. Replaced IAC with an extra one I had laying around (brand new part store closeout). And it got partially better. But it will still do it occasionally. I will be getting a new PCV valve here soon too as I think mine is original. I am running a catch can setup off the passenger valve cover, but it did this before I installed that. There are no vacuum leaks. Car still is not throwing codes (I have a Diablo to read them) and is tuned by the tuner flashing the stock ECM on the dyno almost 2 years ago. Driveability is completely unaffected and MPG is within 2 of what I normally think I'd get (between 15-18). I'm usually right at 15 now all the time.
I will replace Fuel Filter tomorrow..any ideas? EGR valve sticking open?
My problem:
Strange higher idle, although it will occasionally idle down to normal (750)ish rpms. Replaced IAC with an extra one I had laying around (brand new part store closeout). And it got partially better. But it will still do it occasionally. I will be getting a new PCV valve here soon too as I think mine is original. I am running a catch can setup off the passenger valve cover, but it did this before I installed that. There are no vacuum leaks. Car still is not throwing codes (I have a Diablo to read them) and is tuned by the tuner flashing the stock ECM on the dyno almost 2 years ago. Driveability is completely unaffected and MPG is within 2 of what I normally think I'd get (between 15-18). I'm usually right at 15 now all the time.
I will replace Fuel Filter tomorrow..any ideas? EGR valve sticking open?