North East F-Body Association

North East F-Body Association (http://www.northeastf-bodyassn.com/index.php)

- LT1/TPI/TBI (http://www.northeastf-bodyassn.com/forumdisplay.php?f=36)

- - LT1 idle issue (http://www.northeastf-bodyassn.com/showthread.php?t=2848)

Quote:

Originally Posted by ILuvPizzaTimes10 (Post 56143)

problem is your intake IAC passages are now full of sludge. and you adjusting the throttle to "fix" it will for a while and in this weather. as soon as the da changes so will how it idles.

Essentially regardless of iac position. if the passages are plugged which can happen on an old 1993 intake. then the computer has no control over the idle. So id say take the intake off and check the iac passages. there are 4 threaded plugs on the bottom of the intake. take them out and run bailing wire or coat hanger threw them to clean them up. and then a good spraying of intake or brake cleaner. and that should do it.

what tipped me off was that with both the stock and the aftermarket tb's you are still having issues and now after moving the throttle blades(wich should have little effect on idle unless you go too far and over shoot the idle and TPS readings). it now idles ok. thats my guess.

First thing I thought when I read that, computer can't control the idle and your fix simply bypassed the issue.

Quote:

Originally Posted by Formula413 (Post 56154)

First thing I thought when I read that, computer can't control the idle and your fix simply bypassed the issue.

Yeah, this all makes sense now. Thanks guys

just saw this thread I'd suggest first to take the tb right off and clean the shit outta it might be the IAC passages like pizza said my iac was junked up all behind the penis head it had a poopy shaft. Mine was gunked up to hell with oil sludge. douching the TB is def a good idea and its not a big job. it still didnt fix my cold start issue tho...

btw did you test your IAC

do you read before you post? ITS ALL NEW! :facepalm:

Quote:

Originally Posted by ILuvPizzaTimes10 (Post 56274)

do you read before you post? ITS ALL NEW! :facepalm:

Haha thank you pizza, yea its all new IAC, IAT, TPS, MAP, and the TB is brand new as well, doesnt get anymore douched than that lol And I ordered Fel-Pro intake gaskets last night, just wating on those, and I'll pull the intake off. Any hints or suggestions to make the job go easier are appreciated, thanks again guys.

Quote:

Originally Posted by ILuvPizzaTimes10 (Post 56143)

problem is your intake IAC passages are now full of sludge. ....

This led me to believe you guys were discussing sludge buildup in there.

Hes talking about the IAC passages in the intake manifold.

take your time. EASILY bend the head to head bypass tube up and out of the way dont take it off. you cant get the gromets from GM anymore. its the tube that runs down the passengers side of the intake and connects to the radiator near the filler cap. spray a light coat of pb blaster near the injector orings that seat into the intake. if they hevent been off in a while they will but stuck. try not to pry on them just twist and pull with your fingures and you should be good.

Quote:

Originally Posted by ILuvPizzaTimes10 (Post 56296)

Thanks for the tips, I just got the gaskets in tonight, so I'll probably start sturday after school

U can get the gaskets free with a new cross over tube did it just before the motor let go in my car. Ha ha