Fast idle adjustment

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May 11, 2005 | 07:51 PM

Gouber

Thread Starter

New User

Joined: Mar 2005

Posts: 13

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From: Ohio

Fast idle adjustment

I have a 1979 351m with a 2150 2 barrel. dose any one know if the fast idel speed adjusting screw must be on the V of the fast idel cam, or go past it?

May 12, 2005 | 09:11 AM

jtmerritt

Tuned

Joined: Feb 2003

Posts: 495

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From: Cincinnati, Ohio

I am assuming you mean the fast idle cam of the choke system? Don't know what you mean by on the V or go past it. Cam has multiple steps from low to high. Usually the fast idle speed is set using a tach on the highest step of the cam.

John

May 14, 2005 | 03:59 AM

fmc400

MSEE

Joined: Apr 2004

Posts: 10,386

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From: Austin, TX

He is talking about a V that is etched onto the fast idle cam. With the choke snapped shut, hold down the choke pulloff piston so that the choke opens slightly. While still holding, open the throttle a bit and the cam will drop a tad. Let the throttle back down, let go of the pulloff, and the screw (or cam follower) should be resting right on the V.

Last edited by fmc400; May 14, 2005 at 04:20 AM.