GenVibe - Community for Pontiac Vibe Enthusiasts

I am just wondering if anyone with a GT has noticed their car backfire alittle when downshifting or braking .The only time I notice it is in 2 and 3 gear when doing some sort of decelerating. My mods are CAI,exhaust, and Denso Iridium sparks IK20. I only noticed it after installing my exhaust. I'm not sure if it just sounds like a backfire and is really the exhaust hitting something. I do not have any CEL'S or lack of performance. I would say it sounds like a light popping sound and is not all the time. Anyone have the same problem.

this is normal when you put aftermarket exhaust on these vehicles. Mine does it , I have borla and aem short ram

That's not a problem. That's jus back pressure. That's what shows you that you have a good exhaust manifold. If you do the same thing on the base, you don't get any popping sounds. It's just back pressure. Nothing to worry about. Inder Singh

Thanks guys. I was thinking it was normal, but just thought I would ask and give myself piece of mind!!!!!!!!!!

Everytime I let off the gas while in gear it does that and I'm still all stock.Every high compression engine I have ever driven has done the same thing.

Shifting at 4 to 5000 rpm makes mine do it.

Quote, originally posted by TRD4reel » If you do the same thing on the base, you don't get any popping sounds. Inder SinghThat's Not true. My Base does it all the time, especially when decelerating with the O/D off when driving around town.

Yeah i love that sound with my Borla.