About two weeks ago my idle has dipped from 710 to about 610-600 while the car is in Drive. I've tweeked the idle screw on the IACV and all it seems to do is raise the base idle i.e. when the car is in neutral. I've disconnected the brown throttle position sensor while adjusting the idle but my car just does not want to idle higher then 610.

My car has 85k miles on it and in the past 6 months or so I have:
Cleaned the Throttle body
Replaced Fuel Filter
New Coils
New NGK's

The thing that worries me is my idle has dipped so low that its stalled twice now. What do you guys think might be the prob?

 

vacum leak? check that.. replace some hoses.... clean your TB. just some things to check out...

 

what? my car does the same thing, i think it might be fuel injectors, but thats my opinion. i ran fuel injector cleaner and checked all my hoses, might be 02 sensors.

 

its not o2 sensors. my car does the same thing even tho i just replaced all 3 o2 sensors.

 

Warm the engine up to operating temp.
Turn off the engine.
Disconnect the TPS.
Start the engine and adjust the idle speed using the stop screw on the throttle body to 650 RPM's.
Turn off the engine.
Reconnect the TPS and restart the engine.

If the IACV is working correctly your idle should be correct. If it's a bit low, try adjusting the screw on the IACV bypass to get your idle speed to ~700 in neutral with no load. (no load means no lights or A/C)

 

tonite im down the ave go to accel and car barely goes and shudders no cel light whats happenin? went from idling crappy to accel crappy.

 

can you redline it? have you read the ecu codes yet?

Jae

 

When my car was stalling the accel would studder for a sec then drive normally but recenlty its just been idleing very low, no ecu codes. Redlines fine. Ceared the 0505 code, I'm hoping maybe something will register.

 

oh you know what, it might be your evap. control vaulve. i just got it fixed for having the same symptoms. my car would stall at neutral at times. get it checked out. i paid 6 bills for fixing that and getting 3 o2 sensors replaced. good luck!

 

So after the 3 o2 sensors were changed, the mechanic took a guess and tried the ebay control valve? I wonder what made him think that? It's one of the last things I woulda checked... which I may hafta cuz I'm getting some random problems w/my car and the usual suspects are ruled out already. Thanx for the tip!
Jae