67 cougar idles down too low at stop lights

Cougar Community Classic Cougar Maintenance Restoration and Repair
1

Anyone know why my 67 289 idles down too low when I come to a stop sign or stop light runs fine on the other wise idles fine in park when in gear at stops it idles to low I’ve tried turning the idle up a bit. No luck

2

Check the float level. Is it 2V or 4V? Original carb? Autolite or Holley, other? Also look for vacuum leak. Does it have power brakes?

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3

Possible brake boster

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4

Vacuum advance hooked to manifold vacuum instead of ported vacuum

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5

Holley qft 450cfm

6

Thanks for all the responses how high should the float level be it’s under half now is that too low

7

It’s been awhile since I’ve adjusted the float level on a Holley, but if I recall correctly the level of the fuel in the bowl should be just level with the BOTTOM of the sight plug hole ( it will just barely dribble out of the hole, at that point ). Have a look at this video - and there are lots of them on YouTube for the external adjustments to the Holley:
https://www.google.com/search?client=firefox-b-d&q=adjusting+Holley+carburetor+float+level#fpstate=ive&vld=cid:a12e34fb,vid:mlL9ESGTnDI,st:0

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