I have an 85 TA with the computer controlled Q jet. I'm rebuilding it and have most of it back together. I don't see anything about adjustment on this in the instructions that came with the rebuild kit.

 

If you were to pop the caps off of the adjustment screws and tune your CCQjet the advantages would be nill. The computer is responsable for controlling the mixture. I would leave it alone and just put it back togather factory set. I did pop the caps and try to tune the carb old school before and it did so little I wouldent reccomend anyone doing it.

 

Well I took it all apart and I was wondering how tight it should be. I had it completely out.

 

Hmmm, thats a hard one then. Put the screws in and bottem them out, then back them out 1 1/4 turns. That should be close to what GM set them to.
Good Luck!

 

mine are running at 2.5 turns out, set according to the vacuum gauge and tach.

 

you need the proper gaugeing tool which can be bought from napa prt #bk7001134 or look for thx 352 tool kit comes with the proper instructions

 

The mixture screws in the front of the throttle body have almost no effect at all on anything. Their threads are very fine. Set them at about 7 turns out and leave them alone, they don't do anything anyway.

The lean stop is the screw that holds the mixture control solenoid in the bowl. Set it about 5 turns back out from all the way down.

The rich stop is a round thing about the size fo a dime that screws into the bottom of the air horn above the MCS. Set it about 3½ turns back out from all the way in.

The idle air bleed valve is a large screw-head looking thing in the top of the air horn right at the front edge of the choke blades. Set it for about a 50-60% duty cycle on the MCS test lead (30-35° on the 6-cyl scale of a dwell meter) while idling out of gear, and make sure that it stays somewhere near there when you put it in gear.

 

Thanks RB83L69, I'll try that and let you know how it goes. I got the carb back on and sometimes it runs good and sometimes it barely runs. Last night it ran good. Then it wouldnt even start.

 

I set the stop screws where you told me. I had to change the spark plugs, they were filed from flooding it. It runs great now. Thanks for the help!