Idle problem!!!
Idle problem!!! My idle at cold start sits at 1k. As soon as I start driving around it wants to hang at 1500 when I am at a stop light and even when I blip the throttle like it is hung up, it still wont come down. Funny thing is when I turn the ac on then off the idle goes back to 1k and no problems until I shut the car off and back on. It almost stays in open loop until I kick the vents on then off and then it will finally go into closed loop. I dont have any type of tuning tools but I replaced my IAC valve and it didnt help. Can someone help shed some light with maybe some past experiences or help. I know I do not have any leaks what-so-ever as I checked that. Sounds and seems like an issue with the circuitry or pcm but I am just shooting in the dark. This is getting annoying as hell and I need some help. Thanks!
i noticed it when my trip mileage kept getting erased everytime I shut the car off. Dont think it is the battery causing that. Whatever trickle voltage powers the memory bank may have an issue.
I have checked everything! and I am certain there are no leaks. It's getting to be a pain in the *** and i really dont want to tune until I get my heads on there. I guess I'll have to live with it until the heads are finished when it will be ready for the tune.
Trending Topics
Teching In
Joined: Jan 2006
Posts: 31
Likes: 0
From: Weslaco, TX
I had a similar thing happen to me with my GTP. I started the car up and it would idle much higher than normal. I kinda figured it was a vacuum leak of some sort, sure enough after digging around a bit I found a hose that had popped near the throttle body.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
do u have any kind of scanner to check ur tps or any other codes? If you don't u may want to check with a local auto parts store and see if they can run a scan for you. Is your serice engine light on?
I have cleaned everything throttle body, IAC, TPS port, I think I might take off the throttle body and lightly sand the blade. I dont see any scuffs in the throttle body and it is mechanically operating properly. I might just pull the intake for ***** and giggles. Or I can block off the pcv just to see if blocking off the port on the intake under the throttle body makes a difference. If it does I need to investigate pcv line and if not more than likely pcv line isnt the culprit. It seems to do it more when the vehicle is warm after cold start.
yes but I think maybe the manifold is possibly cracked underneath but I seriously doubt it, the hotter it gets you would think at that point since it's plastic the issue should be less relevant when hot.
can you get a scanner to observe the short term fuel trims and spray a little b-12 around the intake and the throttle body while watching the scan tool if it goes rick you got a leak somewhere. check it out it might help you.
my two cents
JOSH
my two cents
JOSH
dude you are probably spot on but I dont have a scanner. I think my computer did some re-learning when i put the new intake on because I have no leaks what-so-ever and everything else is in working order.