Backfires.. how to adjust timing ?

TheDamned · Apr 7, 2006

http://www.doozed.com/95GTRoar.mpg

You can hear I have mad backfires in the video... Somebody told me it ****s up the engine.. I never touched the timing, all stock settings unless the guy before me changed it.

How the hell do I change it so it doesnt backfire anymore?

Thanks.

Stangfreak95 · Apr 7, 2006

I dont think the timing is the problem. Just the fairly cold weather and off-road H-Pipe. I say its normal. If you want to touch the timing , well at least bump it to have more power.

TheDamned · Apr 7, 2006

Well it do that even in our "warm" Québec summer like in August

TheDamned · Apr 7, 2006

Any other inputs ?

95GTV8 · Apr 7, 2006

i have the same question. I have an o/r h w/ stock C/B. I don't think it's so much of backfiring as just popping during deceleration. People tell me this is due to the absence of cats and unburnt fuel is popping in the pipes. However i've heard plenty of mustangs w/ o/r pipes that don't do this. Does this have something to do w/ stock catback? Exhaust leak maybe?

mo_dingo · Apr 7, 2006

that's not backfiring....backfiring sounds like a gunshot..

It's normal, don't worry about it.
Scott

final5-0 · Apr 7, 2006

95GTV8 said:
i have the same question. I have an o/r h w/ stock C/B. I don't think it's so much of backfiring as just popping during deceleration. People tell me this is due to the absence of cats and unburnt fuel is popping in the pipes. However i've heard plenty of mustangs w/ o/r pipes that don't do this. Does this have something to do w/ stock catback? Exhaust leak maybe?

Some decell pop and some don't due the differences in combos causing some to have a/f ratios too fat at the moment of decell.

Grady

95GTV8 · Apr 7, 2006

hrmm, any way to nix the decel popping? It gets kind of old. I have a fairly mild combo, if you could even call it one. I'm hoping to get cylinder heads this summer.

final5-0 · Apr 8, 2006

I've had it ever now and then depending upon what parts were used at the time.

I've found the GT is more prone to do it than the Cobra due to how the pcm is setup.

There are fuel shut off adjustments and the like that can be adjusted if you get inside the pcm.

I don't know how you could dial back the fuel to try and kill it without possibly hurting yourself in other areas of the tune with mechanical means

I myself don't care for it but I've seen others who say they like how it sounds.

Grady

TheDamned · Apr 8, 2006

final5-0 said:
I've had it ever now and then depending upon what parts were used at the time.

I've found the GT is more prone to do it than the Cobra due to how the pcm is setup.

There are fuel shut off adjustments and the like that can be adjusted if you get inside the pcm.

I don't know how you could dial back the fuel to try and kill it without possibly hurting yourself in other areas of the tune with mechanical means

I myself don't care for it but I've seen others who say they like how it sounds.

Grady

I like the sound aswell, but some guy told me backfires like in the video is killing my engine, that it doesnt like it... Is it true ?

bimmertech · Apr 8, 2006

TheDamned said:
I like the sound aswell, but some guy told me backfires like in the video is killing my engine, that it doesnt like it... Is it true ?

not true.

it may also be leaks in the exhaust after the muffler that will suck in air and make a popping noise.

is your exhaust welded or did you just use clamps that came with the kit?

if it is clamped, get someone to weld it up and most of that will go away.

TheDamned · Apr 8, 2006

bimmertech said:
not true.

it may also be leaks in the exhaust after the muffler that will suck in air and make a popping noise.

is your exhaust welded or did you just use clamps that came with the kit?

if it is clamped, get someone to weld it up and most of that will go away.

Not sure I didn't installed it but i know they repalace alot of parts because of rusts so i'm pretty sure it's weld up... But I may have some exhaust leaks in the mufflers, i'll have to check it out.

I like the sound of the backfires anyway, it sounds badass... Some guys told me it was dangerous for the engine that's why I asked... I'm glad it's not.

Any other inputs ?

TheDamned · Apr 9, 2006

GRGT1994 · Apr 9, 2006

TheDamned said:
I like the sound aswell, but some guy told me backfires like in the video is killing my engine, that it doesnt like it... Is it true ?

Like said above, that is NOT backfire. That is exhaust pop. I have heard some Corvettes with only mild exhaust mods do the exact same thing.

If you like that sound, the don't worry about it.

Backfires.. how to adjust timing ?

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