Carter AFB Idle

[Bill G.]

With idle adjusting screw backed off, I cannot adjust idle below 950 rpm on my 65 with Carter AFB. I cannot find a vacuum leak and have replaced the vacumm advance. Any ideas?

[Terry R.]

Re: Carter AFB Idle

Could the idle speed screw on the choke cam be touching even when warm?

[Philip C.]

Re: Carter AFB Idle Try

Bill the throttle shaft that goes thru the body of the carb could cause this, try moving it back and forth and up and down with your hand with car running and see if the idle changes. If it does it needs to be bushed by a carb shop. Good Luck Phil 8063

[Bill G.]

Re: Carter AFB Idle

Terry, screw is not touching cam when warm. Thanks for suggestion.

[Clem Z.]

make sure the idle compensator valve that is

located between the secondary venturies is sealing at idle or you will have a vacuum leak

[Doug Flaten]

Re: Carter AFB Idle

Check your total ignition advance with the vacuum line connected and the engine idling. The distributor could have been rebuilt at some point and may have very light springs that are allowing too much advance to kick in. Also check to see if the vac advance is pulling in too much timing. Some distributors had bushings installed to limit timing advance. I'll defer to someone more knowledgeable about the specific model and applications.