deaccelleration pop and jerking - Third Generation F-Body Message Boards

SDalt404 · 05-17-2008, 09:24 AM

I just gutted my cat and added a catback. Now sometimes when I let off the gas after some RPMs I get a pop or a backfire. Would this be consistant with a lean condition? If so whats the first step to tracking this down?

rad8tion · 05-20-2008, 09:46 PM

I get the same thing, pretty sure I am running rich

Ryan

RBob · 05-21-2008, 08:10 AM

Most likely an exhaust leak.

RBob.

Rebuildman · 05-22-2008, 11:01 AM

Is this pop or backfire in the exhaust? If yes, I would have to say raw fuel in the exhaust when you let of the loud pedal. It is being lit by the hot pipes. I have seen mufflers blown apart this way.

??? · 05-22-2008, 12:20 PM

if your smog pump is still hooked up blowing air into the exhaust it will cause that. if not, exhaust leak.

SDalt404 · 05-22-2008, 12:23 PM

My smog pump is definately still hooked up.

??? · 05-22-2008, 12:30 PM

time to by pass it if you don't have cats. there may be a way to change stuff in the chip so that its in its vented to the outside air mode all the time. but I wouldn't have a clue how.