Exhaust pops and backfire
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Stage IV
Joined: Apr 2017
Posts: 4
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From: Portland
Exhaust pops and backfire
07 twin cam pops and backfires during acceleration at higher speeds and spits blue flame out of the front pipe , could this be a bad valve or running too lean?
Cam sensor ? Turner ?
Cam sensor ? Turner ?
Seasoned HDF Member
Joined: Jul 2008
Posts: 9,282
Likes: 1,139
From: southeast PA
Check for intake and exhaust leaks. Could be tuner related but you didn't say which one you have. Or what other mods, mileage on the bike, etc.
Could be something as simple as a poor battery or ground connection.
Could be something as simple as a poor battery or ground connection.
Seasoned HDF Member
Joined: Feb 2008
Posts: 23,003
Likes: 11,441
First you need to give us some information.
How long you had the bike
When did this start
What changed , added pipes, headers, changed pipes ect
Flame out front of pipes, please explain in detail where you mean.
Long list of causes requires some narrowing down
How long you had the bike
When did this start
What changed , added pipes, headers, changed pipes ect
Flame out front of pipes, please explain in detail where you mean.
Long list of causes requires some narrowing down
Seasoned HDF Member
Joined: Apr 2012
Posts: 9,987
Likes: 5,223
From: Michigan
Also check to make sure that the battery is fully charged.
If you don't have a meter put a battery charger on it for a while and see if that changes anything.
If not, I probably needs a little TLC from a good tech.
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