Backfiring after cat delete
Thread Starter
6th Gear
Joined: Jun 2024
Posts: 6
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Backfiring after cat delete
On my 1995 vette I recently installed catless long tube headers from ARH. I have no mufflers or resonator so it is completely straight piped. Now the car rapidly backfires when I give it throttle especially at low RPMs and it will pop a few off when idling randomly. And when I say backfire I am talking gunshot backfire not little burbles my car is a mobile noise complaint and was wondering if anyone has had the same issue or knows how to fix it.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,591
Likes: 4,055
From: Cape Coral, Florida
With your Long Tubes your upstream O2's are further back in the exhaust stream so you may be running a little lean,,,is it backfiring through the intake ??...you may need to get the engine tuned.
Thread Starter
6th Gear
Joined: Jun 2024
Posts: 6
Likes: 0
I’m working on getting it tuned with LT1pcmtuning.com and it sounds like it’s going out the back of the car and not the intake. And thanks everyone for your comments I’ll be back if the tune doesn’t fix things.
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Joined: May 2017
Posts: 93
Likes: 15
From: Indiana
I’ve got the same deal right now with my 95 LT1 but I used Hooker long tubes. Backfires and running weird. Have you given it a drive or any pulls since you put the headers on? I’m curious if you have the same stumble around 2500 rpm as my car. Keep us posted on your tune! Hopefully that’s the answer to your issue!
