I just finished putting in a 305 TBI engine from a 91 caprice because my father took my car out and didn't turn the toggle switch on for my fan... thats a totally different story though, ended up i spent 2000 dollars on the camaro in the last month!

Anyways, got the engine in, works good. But when im in around town the car will idle around 750 when slowing down in, when im at a dead stop it'll go to 500 then just quitely stall. It's not rough or anything, just idles right down and dies. I'm guessing the person who put my engine in hasn't set the idle screw properly.

I have a 305 TBI engine, and a 5 speed trans... (do standards even use idle screws?)

Anyways, any help on how to located this screw would be incredibly appreciated.

 

yikes, i went from search which got me to LT1 i guess, i meant to put this in 3rd gen engine... sorry people.

 

Easy enough to move......

 

Sorry, gotta bump..
Any info is helpful thanks.

 

There is a screw, but it's kinda hidden. But, you can't just adjust the screw by itself, you need to set what is called "minimum air". Here's a link on how to do it:

http://www.thirdgen.org/newdesign/tech/tpimod2.shtml

The idle screw is on the front driver's side of the TBI unit, right near the throttle lever. In that area, you should see a small recessed metal cap that looks like it's pressed into a hole. Use a punch or small screwdriver to knock it sideways, and then remove it. Now the idle screw is exposed and can be turned. I can get a picture of where the cap is if you need it, just let me know.

 

Ok thanks for the help, i found the metal plate covering the idle screw yesterday, just never thought of moving it aside and taking it out. Thanks for the help, i'll drop another message if i run into any difficulty.

 

One other thing you might want to check, especially if the idle set screw doesn't do the trick is to take out your Idle Air Control Valve and clean the pintle and the IAC air bypass with Carb and Choke cleaner.

I was having a problem with my '86 IROC where it would run fine for a while and I would shut it down and do something quick like getting money from an ATM, then I would start it up, it would start and then immediately stall.

I would end up having to drive with one foot giving it a little gas and the other one on the brake.

Didn't work so well at a stop when in gear (Automatic) and trying to give the engine just a little gas while balancing not having to stand on the brake.

Just giving the Throttle body a little gas opened the butterflies and gave it the air it was starving for since the IAC was completely filfy and the bypass was quite dirty too.

So it wasn't lack of gas it was lack of air.

Might want to check it.

Easy enough to do.