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ok she's backfiring slightly when accelerating and shifting up through the gears and sometimes when down shifting. She did this before the tune up and although it isn't as loud it's still there...what do ya'll think???

Crank up the tunes real loud and it won't bother you much.

Or you could look for an exhaust/intake vacuum leak, or check your egr.

Okie Dokie I'll start there and let ya know Thanks Taz

I had a slight backfire in my truck and it ended up being the air/smog pump that was causing it.

Check the donut between the header and exhaust. Or, if still equiped, the EGR fittin/tube coming off the manifold.

I had cut off, crimped and welded my EGR tube last year only to have the short piece of tubing fall out of the fitting later...backfired like a sombitch.

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FIAA: Color Guard

Hey like the "Cranking up the tunes Idea" No joke Seriously I think I've said that to a few friends through the years and it does actually work
"GREAT MINDS THINK ALIKE"

79-LUV'r
You know I just had the whole muffler replace and let them talk me out of not replacing the dang Donut errrr that's what I get for ignoring my instincts.
Dang it I knew better Thanks for the Info dude

You mean a back friring in the exhaust.

Not back fring thru the carby.



In the exhaust is comonly caused by air gettin in and helping unburnt fuel to burn.
I took the belt off my smog pump. Passed smog, every time you would back off it would backfire like a shot gun.

It still burbles a fair bit when your backing off, so its a common thing to change down gears nice an early and keep the revs right into it.

Sounds pretty good actually. Its sorta sounds sporty, but i know its the exhaust and it full of holes.

But it doesnt do it when accelerating. That could be EGR related. But lets face it most EGR ports a clogged at the inlet. So i would say theres an exhaust leak at the EGR.

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Current project, 1979 KB Isuzu Ute.

Daily driver, '86 Rodeo Spacecab.
Chasing parts for Isuzu Impulse.

Well I'll checking all that out tomorrow I'll let ya'll know what happens Thanks guys

could be the timing too

Roger That

Actually I was sidetracked on a little overheating problem so I've nailed that down and tomorrow I'll get back on the Backfire problem Thanks guys