Alright so Ive had this problem for a while the car idle's rough when cold, when first started I need to give it gas for a minute or so if not it turn's off, even after 10 minutes of driving if Im at a light it bog's down and die. I thought it might be a fuel problem so being that eventually I would do it I replaced the fuel pump with a BBK 255 lph, and changed the fuel filter and still it does it!!!

I checked all the wires and ground's and nothing seem's off.

WHAT GIVE'S?!?!?!?!

 

I would get some throttle body cleaner and clean up your bores and the IAC passage. Also the pintle on the throttle body is more than likely carboned up. It's best to pull the throttle body off and do a good clean up. Next check your EGR, you could have a weak spring causing it to stay open.

 

I just had my head's put on in february and I know when the shop installed them they cleaned everything including the TB. Ill go ahead and check the EGR and let you know. Thanks for your help!

 

Any time i head that kind of stuff, my first thaught are going to CTS, maybe your coolant temperature sensor is off, therefore, indicate to your PCM that the car is hotter then it is really... i would have a look in there.

as per stated previously, also , look at the IAC motor.
the plunger could be dirty or gummed up.

Eric

 

Any time i head that kind of stuff, my first thaught are going to CTS, maybe your coolant temperature sensor is off, therefore, indicate to your PCM that the car is hotter then it is really... i would have a look in there.

Eric

 

alright so Im trying to get to the bottom of this so I started by cleaning the IAC valve. When I remove it the valve was really dirty and when I attemped to push it in the valve would not budge I figured it was due to the grime. I sprayed it down with carb cleaner and tried again but nothing. Is it fixed or should it be able to move?

 

???

 

I checked mine and I can move. Suggestion is go to the parts store and check a new one. Won't cost anything.

 

Well I went to the part's store the the tip din't move either so I bought it to try it. I installed the IAC sensor plugged everything up and WOW it run's great now!!! The only thing now is that the idle fluctuates a bit at start up but Ill keep tuning it.

I appreciate all the help Im new to muscle car's so Ive never really messed with the motor's much. Again thank's a lot and if you have any suggestion's on the idle and what not shoot em at me.

 

If you continue to get idle surge, try advancing timing a bit maybe 2 degrees.

 

Alright Ill try that. I have been getting tired of turning it on and it shooting up to 1500 and staying there!

 

Ok so Ive been having a few issues with my idle and what not....Ill post a video of what it does...in the video you see the idle go back down but in some cases It will stay at 1500rpm if in P or N so what do you guy's think


sorry about it being sideways
http://www.youtube.com/watch?v=UnhmmkCnLEY

 

bump?

 

bump