backfiring?
Thread Starter
5th Gear Member
Joined: Jul 2005
Posts: 2,680
From:
backfiring?
well as you prob know I just got an Xcal, now my car backfires (I think). Its not that loud, more like a sputter or something...kinda like "vroom vroom vroom pffft vroom vrooom vroom". Seems to mainly happen in the lower rpms...like around 1000 or so. If it happens at higher rpms I don't notice it. Mostly if I rev up the engine and on the way back down it does it a little. At first I though it was cuz I didn't have enough premium in my tank, but now I should have about 90% premium (91). Any ideas?
The Godfather
Joined: Sep 2005
Posts: 15,480
From: Temple, Texas
RE: backfiring?
Should of gotten Magnaflows, my stock exhaust used to backfire in the upper rpms, but with my duals, she never, not once, has backfired, you may of mistuned something, but I'm willing to bet its the mufflers.
Thread Starter
5th Gear Member
Joined: Jul 2005
Posts: 2,680
From:
RE: backfiring?
ORIGINAL: jthorn9
Should of gotten Magnaflows, my stock exhaust used to backfire in the upper rpms, but with my duals, she never, not once, has backfired, you may of mistuned something, but I'm willing to bet its the mufflers.
Should of gotten Magnaflows, my stock exhaust used to backfire in the upper rpms, but with my duals, she never, not once, has backfired, you may of mistuned something, but I'm willing to bet its the mufflers.
But yeah, think I'll contact the tuner guy.
The Godfather
Joined: Sep 2005
Posts: 15,480
From: Temple, Texas
RE: backfiring?
Well its a combination of the two, as I understand it. Backfire occurs, I think, when you have either an excessive build up of air in your pipes, due to either the cats restricting air flow or the mufflers, and when the air is finally released, there is a small void of air, which inturn creats backfire when the next boost of air is released. Like I said this is how I understand it to occur, so I may be wrong in my explanation, but I do know I has something to do with airflow in your pipes, well unless your timing in your engine is off, then that could also cause the problem.
EXTREME Moderation
Joined: Apr 2005
Posts: 7,895
From: BLAM-O
RE: backfiring?
ORIGINAL: jthorn9
Well its a combination of the two, as I understand it. Backfire occurs, I think, when you have either an excessive build up of air in your pipes, due to either the cats restricting air flow or the mufflers, and when the air is finally released, there is a small void of air, which inturn creats backfire when the next boost of air is released. Like I said this is how I understand it to occur, so I may be wrong in my explanation, but I do know I has something to do with airflow in your pipes, well unless your timing in your engine is off, then that could also cause the problem.
Well its a combination of the two, as I understand it. Backfire occurs, I think, when you have either an excessive build up of air in your pipes, due to either the cats restricting air flow or the mufflers, and when the air is finally released, there is a small void of air, which inturn creats backfire when the next boost of air is released. Like I said this is how I understand it to occur, so I may be wrong in my explanation, but I do know I has something to do with airflow in your pipes, well unless your timing in your engine is off, then that could also cause the problem.
EXTREME Moderation
Joined: Apr 2005
Posts: 7,895
From: BLAM-O
RE: backfiring?
it could be low octane, but you said you already put premium, right?
a backfire is loud, like a really small gun (or a really big cap gun). maybe you are getting pinging. if it's coming from the motor, it's not backfiring... backfiring happens in the exhaust.
a backfire is loud, like a really small gun (or a really big cap gun). maybe you are getting pinging. if it's coming from the motor, it's not backfiring... backfiring happens in the exhaust.