Backfire, Is It Bad?

[bugster70]

For real?

No, I can only hope DRTYBOOST was joking. As Fatsex has said, lean out backfire is never a good thing. It's happened to me a couple of times before too and I am now seriously considering having a surge tank fitted. In a worst case scenario, a bad lean out backfire could result in you blowing your engine. So to say that it's "nothing to worry about" is being a little blase about it IMHO.

Either refrain from giving it WOT with less than 1/2 tank or get a surge tank.

[DRTYBOOST]

What ive been told is that When your Car back fires its usually caused by high fuel getting sucked in, also when your car is hot it just does it, but nothing to worry about. I can make my car do it sometimes when I rev at a low gear up to about 5000rpm+ and then back off, But yeh someone correct me if im wrong it could be a bad thing, my cars been doing it for ages ive had no problems.

Edited 14/04/08 06:22 AM by DRTYBOOST

[XF Falcon]

I guess if its blowing flames due to excess fuel (and you have a "modified cat") then that's pretty safe isn't it, in comparison to a lean out backfire

[bugster70]

I'm no expert, but from what JTXR6T is saying, I'd put money on it being a leaning out backfire issue. The car is making around 300rwkw, so it accelerates like a mad thing, he's low on fuel (80kms DTE), giving it WOT and going uphill. All of which, to me anyway, adds up to a leaning out/fuel starvation issue.

[Fat-Tony]

The fact that in a lean out backfire you are getting some sort of explosion happen inside the exhaust would indicate that well flames out the exhaust would follow.