Slow Return to Idle


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By cbass139 - 14 Years Ago
And it continues. Now I have fixed the hard starting and the bog from idle, thanks to you guys but now it is slow to return to idle and when it gets down around 1000 it almost never goes all the way down to the 850. The last part of that might be that the return spring is warn and at the bottom end does not pull it far enough to get it all the way back, I will try fixing that but even with me pulling the linkage back to the start position it slowly returns to idle. As a reminder this is a 292 with a 2 barrel Holley 2300 on a f100 that has a electric mallory dizzy. Initial advance is 10 and the vacuum is working great. Where do I begin?

Thanks in advance

Cbass
By Hoosier Hurricane - 14 Years Ago
You adjusted the accelerator pump actuating screw, now you have problems with idle speed.  That's where I would look first.
By cbass139 - 14 Years Ago
See, simple stuff like that would never occur to me. Thanks so much.



Cbass
By cbass139 - 14 Years Ago
John I think that this was a part of the problem, along with the idle screws being to far out and the return spring being a bit weak. After fixing all of these and dialing it in with a vacuum gauge it is running better than it has since I have gotten it. Thanks for the help

Cbass
By Grizzly - 14 Years Ago
John's right work at one thing at a time and only move onto the next when you are satisifed that it is correct or it was not the problem. Always good to get a baseline with original settings. So you can return them later.

a slow return to idle or hanging at higher revs is usually associated with an air leak or an overly lean situation.

Stick with it.

Cheers

Warren

By cbass139 - 14 Years Ago
Thanks Warren, I did start with what John had suggested and went through each part getting them all right before moving on and now it is running great. I do believe that the accelerator pump linkage was the biggest problem and once I got that fixed everything else just needed to go back to a normal setting.

Cbass