whytryz28

iTrader: (28)

My car has been backfiring upon decel from 2500+rpms and spits flames out my exhaust, happens everytime I let off the gas.

Any ideas? Opti is couple months old, has MSD coil (3 months old), stock ICM, MSD wires and NGK plugs less than 3k miles.

Randal McSandal

iTrader: (3)

Spark plugs in the right order? Did it just start doing this?

Z28_LT1

iTrader: (2)

mine would backfire like crazy when i had lts w/o a tune. could it be related to your tune?

James Montigny

iTrader: (13)

Do you happen to have a leak somewhere in the exhaust? Likely the header gaskets or the collector flange?

whytryz28

iTrader: (28)

I noticed it starting doing this ALOT more now that its getting cooler

I have a header gasket leak.

James Montigny

iTrader: (13)

You might want to go ahead and fix that.
Your O2 sensor is seeing extra O2 and the PCM is adding fuel to compensate for what it thinks
is a lean condition. You're blowing the unburnt fuel out your exhaust port and igniting it with the fresh air that's leaking in.

You'll notice this more when it's cold out.

1nicez28

iTrader: (7)

My LT1 camaro was shooting flames when it was running pig rich. Also when 3 inj's were just dumping fuel.

whytryz28

iTrader: (28)

I REALLY hate this car lol

Thanks guys.

Sk8phreak88

iTrader: (4)

Welcome to the club! Well of course when it's running right they are the best car in the w0rld fo realzz..

But yeah like mentioned, that header gasket could/most likely is it.

whytryz28

iTrader: (28)

This isnt my first rodeo with camaros and every time i get another one i keep asking why...lol