Back Fire
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3rd Gear
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Jim
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Pro
Joined: Jul 2004
Posts: 555
Likes: 25
From: Jefferson County Alabama
my grandpappy,who was a Chevy carburetor mechanic during the 40's,50's,and, 60's, ajways told me that a backfire was not good on an engine,and, those engines did not have the hp that our Vettes have.
Matter of fact, I have seen mufflers and exhaust pipes blow off from a backfire.
Matter of fact, I have seen mufflers and exhaust pipes blow off from a backfire.
Le Mans Master
Joined: May 2000
Posts: 8,729
Likes: 1,508
From: Redmond WA
my grandpappy,who was a Chevy carburetor mechanic during the 40's,50's,and, 60's, ajways told me that a backfire was not good on an engine,and, those engines did not have the hp that our Vettes have.
Matter of fact, I have seen mufflers and exhaust pipes blow off from a backfire.
Matter of fact, I have seen mufflers and exhaust pipes blow off from a backfire.
What your grandpappy was talking about is a transient ignition loss. Take a 1969 Nova, drive it 30 mph, turn they key off, coast 5 seconds, turn it back on: BOOM. Kinda fun when you're a kid. I used to do it in underpasses to scare bicyclists (30+ years ago, mind you, and not a proud memory). But it can blow up mufflers and exhaust quite easily.
That's the excess fuel accumulated in the exhaust system. Because this is a fuel cut, it's the exact opposite and cannot cause the problem you're thinking of.
Grandpappy would love it, I'm sure.
Last edited by davepl; Jul 3, 2017 at 04:24 PM.
Instructor
Joined: Jul 2007
Posts: 194
Likes: 2
From: Peoria Az
Mine backfires at 6000 rpm under a load. It happens when I am driving along at 40 - 50 mph and kick down on it. It shifts down and goes to 6000 and backfires. Trouble is the cars shifts at 5500 when I accelerate from a start. In my mind the car should not have gotten to 6000 as it should have shifted gears at 5500. I have it scheduled at dealership Thursday.
Melting Slicks
Joined: Feb 2004
Posts: 2,244
Likes: 122
From: st paul minnesota
Mine is an early C7 and when I first experienced the 'bark' I wasn't sure what was going on. There were others on the forum at that time commenting as well and it was eventually concluded it was normal. It hadn't been something happening on the C6's as far as we knew so it was a new experience that we grew to appreciate!
Team Owner
Joined: Apr 2005
Posts: 35,731
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From: Northern NYs Adirondack Mountains,http://www.visitsacandaga.com.
That small "backfire" is a nice thing to listen to. If it happens with a friend in the car they normally tell me something wrong with your car. I then explain it and they then understand.
Where I live on the large lake we have very few passing zones and in the summer slowpoke drivers gawking at the scenery so If you get a chance to pass, got to take it or hang there behind the slow mover sometimes for a lot of miles. You time it right and the backfire will hit right as you go by them, it does tend to wake them up.
Where I live on the large lake we have very few passing zones and in the summer slowpoke drivers gawking at the scenery so If you get a chance to pass, got to take it or hang there behind the slow mover sometimes for a lot of miles. You time it right and the backfire will hit right as you go by them, it does tend to wake them up.