Q jet help
Thread Starter
Racer
Joined: Sep 2007
Posts: 370
Likes: 5
From: Bradley Il.
2017 C3 of the Year Finalist
Q jet help
HI ALL
I'm not a carb wiz but I rebuilt my carb and it runs great except on a cold start I set the choke and it fires up fine, runs on fast idle for several seconds and then dies. I re start and then it runs great. What adjustments do I need? Keep in mind I am not sure which adj. screws do what.
Thanks
I'm not a carb wiz but I rebuilt my carb and it runs great except on a cold start I set the choke and it fires up fine, runs on fast idle for several seconds and then dies. I re start and then it runs great. What adjustments do I need? Keep in mind I am not sure which adj. screws do what.
Thanks
Heel & Toe
Joined: Apr 2006
Posts: 20
Likes: 0
HI ALL
I'm not a carb wiz but I rebuilt my carb and it runs great except on a cold start I set the choke and it fires up fine, runs on fast idle for several seconds and then dies. I re start and then it runs great. What adjustments do I need? Keep in mind I am not sure which adj. screws do what.
Thanks
I'm not a carb wiz but I rebuilt my carb and it runs great except on a cold start I set the choke and it fires up fine, runs on fast idle for several seconds and then dies. I re start and then it runs great. What adjustments do I need? Keep in mind I am not sure which adj. screws do what.
Thanks
I would check all the vacuum lines and make sure you have no issues there. Check your choke pulloffs and vacuum advance can/hoses as well.
Good luck.
Race Director
Joined: May 2006
Posts: 18,597
Likes: 2,540
you have to email him V8FastCars@msn.com
1. What rpm did you set the fast idle for?
2. What kind of choke is on your car, electric, divorced, etc. ?
3. Did you adjust the choke?
1. What rpm did you set the fast idle for?
2. What kind of choke is on your car, electric, divorced, etc. ?
3. Did you adjust the choke?
Le Mans Master
Joined: Feb 1999
Posts: 8,351
Likes: 75
From: Tampa Bay FL
Are you tripping the fast idle after a few minutes? If not, like others say, your choke appears to be incorrectly set/inop.
When I pull my air cleaner and watch that big 'flap' on top of the carb when car is first started with choke, I can see it start almost closed but for 1/16-1/8" and then GRADUALLY open. If yours is not setting correctly initially then your initial shot of gas is getting used up and the choke is not taking over until the engine is nice and warm.
Lars set mine up nearly 12 years ago and it still works great on every start-up.
When I pull my air cleaner and watch that big 'flap' on top of the carb when car is first started with choke, I can see it start almost closed but for 1/16-1/8" and then GRADUALLY open. If yours is not setting correctly initially then your initial shot of gas is getting used up and the choke is not taking over until the engine is nice and warm.
Lars set mine up nearly 12 years ago and it still works great on every start-up.
