WUTARAG

This is on a 2004 with very few mods - Stillen air cleaner, lightweight flywheel and Wolf clutch.
Back story - the car was occasionally puking (0 RPM) if I would be hammering it and then got out of the gas. Also had begun idling pretty rough.
I cleaned the Mass Air Flow Sensor with MAF cleaner and the throttle body with carb cleaner.
The idle seemed to stabilize and it hasn't puked on me yet.
However - the idle has now gone high (1200) and doesn't seem to come down as quick when you get out of the gas and clutch in.
CEL is on and throwing a P0507 (P0507 Idle Speed Control System )
I'm guessing I need a new MAF sensor but wanted to see if anyone else had seen this before?
Thanks in advance for any advice.

PerfZ

iTrader: (3)

Did you move the butterfly in the TB when you cleaned it? If so, that is a big no-no. And or you might have a defective TB or the position sensor riveted onto the TB, in which case you need a new TB. Reman unit at the dealer cost me around $160 a couple years back.

WUTARAG

Yes - I definitely opened the TB and used a tooth brush in there.
Why is that a bad thing to do? Not trying to be a jerk - I just don't understand. Doesn't it open with the throttle?

PerfZ

iTrader: (3)

The 350 is throttle by wire. Electronic control, not linkage. You are probably going to have to go the dealer and have the TB reprogrammed - it has lost it's idle position, although that is not exactly the technical term for it. Lots of threads on this. Search cleaning TB for starters maybe...

WUTARAG

Perf - thanks for the info, much appreciated.