Carb Popping
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by torqvette
My Q-Jet pops occasionally when the car is warming up. Doesn't sound like a backfire. What could it be?
Drifting
Joined: Nov 2002
Posts: 1,665
Likes: 1
From: Ontario
A vacuum leak can lean your mixture and cause popping...
This might help you out -
Excellent QJet troubleshooitng by Lars
This might help you out -
Excellent QJet troubleshooitng by Lars
Melting Slicks
Joined: Jun 2001
Posts: 2,266
Likes: 549
If the pop comes when you step on the gas, your accelerator pump may be bad. To check remove the air cleaner follow the pump linkage to the top driver side of the carb. Push down on the pump shaft and look down the venturi for a strong steady stream of gas into the primaries. Ron B.
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by torqvette
Accelerator pump? Clue me in...
Also I think you guys might be right. My choke doesn't work so it would make sense that the carb leans out when it's warming up.
Also I think you guys might be right. My choke doesn't work so it would make sense that the carb leans out when it's warming up.
Racer
Joined: Feb 2004
Posts: 265
Likes: 1
From: Irwindale Ca
carb popping is when the vehicle gas air mixture is too lean. Sounds like you get a good squirt from the accelerator pump just sounds like your not choking enough till the vehicle warms up. Id say fix the choke and the problem is solved..
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Thread Starter
Melting Slicks
Joined: Sep 2004
Posts: 2,412
Likes: 3
You must be right, my Q-Jet doesn't work with the new intake manifold. But is the poping dangerous? I am saving up for a Demon but the Mighty Demon 750 that I plan on buying doesn't have a choke at all.
Team Owner
Joined: Sep 2003
Posts: 88,393
Likes: 2
From: eville in
Originally Posted by Boofers
A vacuum leak can lean your mixture and cause popping...
This might help you out -
Excellent QJet troubleshooitng by Lars
This might help you out -
Excellent QJet troubleshooitng by Lars
