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Author Topic:   need a little help please
Dirt Forum Racer

Total posts: 85
posted March 24, 2003 08:38 PM
I just bought a barry grant demon carb and put it on my motor and cant get it to idle at all anything below 3000 and it dies any suggestions? have to pump it to keep it going at 3000 but anything over that and it runs great. any help would be GREATLY appreciated thanks one to play day and i'm gettin the jitters!!

Dirt Freak

Total posts: 230
posted March 25, 2003 08:57 PM
you got a big air leak somewhere

jhon hollomon
Dirt Maniac

Total posts: 181
posted March 25, 2003 09:52 PM
Gene's right, you should check for vaccum leaks.

Dirt Forum Racer

Total posts: 85
posted March 26, 2003 12:28 PM
have checked everywhere 4 leaks and sprayed all around the carb and no leaks replaced and or checked gaskets but still the same problem some one told me to ckesk power valve b-cuz there isnt e-nuf vacuum to pull fuel at an idle what do you guys think

Dirt Full Roller

Total posts: 57
posted March 26, 2003 06:49 PM
DEMONS run on the idle curcuit alot longer than others, they won't pull fuel through the boosters til about 3000 rpm. So if you don't have a vacumn leak, you must have the idle mixture screws turned in to far. with engine not running bottom the screws in all the way (alot of times these screws hit the bowl before they are in all the way, it may bend the bowl flange in aliitle to get them in all the way. then turn them out 2 1/2 turns each. start engine if it still won't idle turn them another turn each(keep all screws turned out the same amount. Once you get it to idle, let engine warm up and slowly adjust in or out in small incerments til you get the highest idle.
Keep in mind if the butterflys are open to far it will uncover the transfer slot in the base plate and won't adjust correctly.
If you can't get it to idle even with them ******* out along ways try covering the idle air bleeds in to top of carb with you're fingers. These are the out side ones not the inside ones (2 for the front and 2 for the back). Pluging these with you're finger will richen the idle mixture and let you know it's lean. Some of the early speed demons needed restrictors install in them. If your'e out more than 3 1/2 turns on the idke mixture screws it usually need the restrictors installed.

Dirt Freak

Total posts: 247
posted March 27, 2003 12:22 PM
On my Gold Claw I had to put in smaller air bleeds to get it to idle correctly.

Dirt Forum Racer

Total posts: 85
posted March 28, 2003 08:48 PM
thanks guys i'll check that tomorrow it did come w/ smaller air bleeds so i may have to try that but the help is much appriciated!!

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