deaccelleration pop and jerking

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May 17, 2008 | 08:24 AM

SDalt404

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From: New Smyrna Beach, FL

Car: 1988 GTA

Engine: 305

Transmission: 5 Speed

deaccelleration pop and jerking

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?

May 20, 2008 | 08:46 PM

rad8tion

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From: RI

Car: 92 RS Convertable

Engine: RAMJET 350

Transmission: G-FORCE T-5

Re: deaccelleration pop and jerking

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

Ryan

May 21, 2008 | 07:10 AM

RBob

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From: Chasing Electrons

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Engine: check

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Re: deaccelleration pop and jerking

Most likely an exhaust leak.

RBob.

May 22, 2008 | 10:01 AM

Rebuildman

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From: SE AZ

Car: 1990 Corvette, 1985 C-10 1979 Subun

Engine: 350, 406 HSR

Transmission: manual, 200 4r

Re: deaccelleration pop and jerking

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.

May 22, 2008 | 11:20 AM

???

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Re: deaccelleration pop and jerking

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

May 22, 2008 | 11:23 AM

SDalt404

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From: New Smyrna Beach, FL

Car: 1988 GTA

Engine: 305

Transmission: 5 Speed

Re: deaccelleration pop and jerking

My smog pump is definately still hooked up.

May 22, 2008 | 11:30 AM

???

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Re: deaccelleration pop and jerking

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.