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-   -   Adjusting the idle (http://www.clubcobra.com/forums/holley-tuning/128414-adjusting-idle.html)

genolan 04-02-2014 09:04 AM
Adjusting the idle
 
I decided to lower the idle after a nice ride last night and adjusted the idle screw and to my surprise the idle would not go any lower than 1000rpm. I checked the choke and it was wide open. Any ideas?

FWB 04-02-2014 09:09 AM
Quote:
Originally Posted by genolan (Post 1293636)
I decided to lower the idle after a nice ride last night and adjusted the idle screw and to my surprise the idle would not go any lower than 1000rpm. I checked the choke and it was wide open. Any ideas?
check the mixture with a vacuum gauge adjust that first, you could also make sure the secondaries aren't open a little at idle hindering the adjustment lower. hard to say more without being there....

Rick Parker 04-02-2014 09:42 AM
The secondaries (on a four corner idle carb only??) have a very small screw accessed from the bottom of the baseplate. It is used to just barely open the secondaries. If they are open a little too much, they alone will support an above average idle speed even if the primaries are completely closed

DanEC 04-02-2014 10:24 AM
It's probably what Rick said above but also check your throttle linkage (rod or cable) to be sure there is enough slack in it to allow the throttle to close a little more.

ffr 1137 04-02-2014 02:16 PM
Had that happen on the Stang with a 670SA. Eng off...hold throttle fully open...the red plastic piece on opposite side is holding primary open a little. Dislodge it. It's part of the elect choke but mine isn't hooked up so don't know why this happens.


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