LS1_K1DD

iTrader: (3)

Hey everyone my friend has a 94 LT1 M6 Camaro. Everytime he shifts there is a slight backfire out of the exhaust?... why? what is causing this? He has an aftermarket Borla exhaust. Could it be the exhaust/tips itself? I was thinkin he wasn't firing all the way on compression stroke when #1 was on TDC.. but then it wouldn't even fire if it wasn't all the way on compression... I have no idea... any ideas?

LS1_K1DD

iTrader: (3)

Cmon anyone??

RedRocketZ28

iTrader: (19)

Mine does it when the car is cold. Once it warms up it goes away.

95N20FORMULA

iTrader: (3)

Mine does it occasionally when im racing and shifting in the higher RPMS...maybe the MAF, or exhaust leak???

lt197formula

iTrader: (6)

I usually shoot a few inch flames out when I shift at wot but I have no emissions, long tubes, 3 inch x pipe, and bullet mufflers ran over the axle. Which reminds me I still need to get a night video of it

nomoneyz

iTrader: (15)

its an lt1 thing my auto car does it if i let off before the tranny shifts.

sam95transam

backfire is common on these cars from what I have noticed. I didnt notice it on my car until I went from stock exhaust to corsa about a year ago. I wasnt too keen on the sound then, but I have gotten used to it. I wouldnt loose any sleep over it, unless it is just aweful.

LT1Falcon

iTrader: (3)

mine ocasionally back fires when the torque converter is locked up and i let out of it

Ironxcross

iTrader: (8)

is it tuned? these cars run rich stock, maybe thats it.

mine used to do a sort of backfire thing til i got it tuned

Gun5

iTrader: (37)

well its lean pop when ur on it and let off quickly.. i dunno bout all that all i know is i know alot of LT1's do it

97Formy

Mine does the same thing. When it's cold it pops, when it's warm it doesn't.

Does it do it all the time or just when it's cold?

the_merv

iTrader: (88)

Mine did it at the track cause it was bouncing off of the Rev Limiter, maybe he is shifting right at that spot..

LS1_K1DD

iTrader: (3)

It does it all the time. Maybe a timing issue? He is the 2nd owner of the car so maybe the 1st owner messed with the timing? But if its a common LT1 thing ill let him know. I was just wondering since i may purchase the car. But no the car isn't tuned. And about the running rich when stock.. could it be MAP Sensors?

The LT1 That Could

iTrader: (3)

its an LT1 thing.....don't worry about it

camar0corey

iTrader: (22)

Mine pops on just about every shift, cold or hot, also can hear it multiple pop or maybe it just sounds really raspy on deceleration, but I'm running a bullet muffler, probably has to do something with the audibility of it.

I can still remember how quiet the stock exhaust was, couldn't even really hear the car accelerate, let alone if something was going on.

Enforcerws6

iTrader: (1)

If you have an exhaust leak that is letting cold air in when you let out it will cause it to backfire. Mine started that after I did some work on the pipes and didnt get one sealed up all the way. If i manually shift it and dont bring it up into 4th before i let out from cranking it up it will pop pretty loud.