Afterfire- Real bad
Thread Starter
Heel & Toe
Joined: Oct 2011
Posts: 16
Likes: 0
From: NJ
Afterfire- Real bad
My C2 1966 427 is after-firing through the exhaust something horrible. It starts to buck like when a car slows down and you don't throw in the clutch. Even when I have enough speed or am accelerating, it after-fires through the side pipes like a machine gun especially when I let off the accelerator. I rebuilt the carb and set the timing and the after-fire went away. I only drove it a few miles after I timed it and then put it away. The very next time I took it out it started doing it again.
This one has me and my friends baffled. We feel it is Fuel, air or vacuum. Anyone out there with suggestions?
Thanks
This one has me and my friends baffled. We feel it is Fuel, air or vacuum. Anyone out there with suggestions?
Thanks
Thread Starter
Heel & Toe
Joined: Oct 2011
Posts: 16
Likes: 0
From: NJ
Thanks for the help.
I have been reading a lot of posts on this site. Looks like I came to the right place. I will put her on the lift tomorrow and check the exhaust. I will let you know how I make out. Thanks for the replies.
Le Mans Master
Joined: Aug 2006
Posts: 7,417
Likes: 1,554
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Welcome!
I might try a new set of points, check the dwell and timing and go from there.
A little more history like: what carb, any other mods and such will help.
And by the way you posted on the C-3 Tech Forum, but thats OK!
You'll get help on this question here too!
A little more history like: what carb, any other mods and such will help.
And by the way you posted on the C-3 Tech Forum, but thats OK!
You'll get help on this question here too!
Pro
Joined: Nov 2010
Posts: 602
Likes: 32
From: Old Bridge, NJ
You mentioned that you rebuilt the carb and set the timing and the problem went away...then came back.
You didn't mention if you checked the timing after the problem returned.
Consider that your distributor hold-down could be faulty, causing it to rotate and mess up timing or your points could be moving.
You didn't mention if you checked the timing after the problem returned.
Consider that your distributor hold-down could be faulty, causing it to rotate and mess up timing or your points could be moving.
Melting Slicks
Joined: Aug 2008
Posts: 2,200
Likes: 3
From: Lehigh county Pennsylvania
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