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Author Topic:   idle air *****
Dirt Maniac

Total posts: 102
posted April 10, 2003 02:13 AM
I have a quadrajet and I was going to adjust the two screws on the front near the bottom. I was told to back of them all the way and then turn back up to I got max rpm but all never seen a differnce in rpm except it wont Idol with them all the way in. So I turned them both exactly 3 turns a left it. Is that all right or what do I do?

Dirt Freak

Total posts: 230
posted April 10, 2003 03:52 AM
The rule of thumb for this is... turn both screws in til they stop, then back them out 1 1/2 turns, start engine and fine tune the screws to max rpm at idle.

rico 08
Dirt Freak

Total posts: 372
posted April 11, 2003 09:15 PM
Then you have a big enuf cam that the butterflies are open enuf to expose the transfer slots(i think quads have 'em!)and the idle circuit will not do a hill of beans to the idle mixture,open up the holes in the butterflies to get them closed more so the idle can be adjusted.

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