Exhaust backfire
Thread Starter
TECH Enthusiast
Joined: Feb 2012
Posts: 631
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From: Orlando
Exhaust backfire So I've tried to search this issue and all I can find is intake backfire and backfire at idle. My my car has been backfiring anywhere above 2000rpms when I start opening up the throttle on the highway till I get full engagement on the gear. It's been doing it since I got the car but it really hasn't bothered me much. I wondered but kinda hoped flames were shooting out the back. 
The car has had the following refreshed:
New plugs
New opti
Stock old:
Old wires
Cats are gutted out
Sometimes above 3000rpms I'll let go of the throttle and I'll hear some rumbling in the exhaust. I'll let go of the throttle all the way then once I give it a hair of gas I'll hear the backfire. It goes away once I give it enough throttle to accelerate. I know it may be a cliche for LT1's but wondered why it does that.
The car has had the following refreshed:New plugs
New opti
Stock old:
Old wires
Cats are gutted out
Sometimes above 3000rpms I'll let go of the throttle and I'll hear some rumbling in the exhaust. I'll let go of the throttle all the way then once I give it a hair of gas I'll hear the backfire. It goes away once I give it enough throttle to accelerate. I know it may be a cliche for LT1's but wondered why it does that.
Last edited by 93Euphoria; Nov 20, 2012 at 10:50 PM.
The rumble when you let off the gas is normal, but the backfire definitely is not. I had one for the longest time and it ended up being a spark plug wire. I know it's a pain, but pull each wire and look at them/test them.
