question regarding backfiring

[Dreco]

ok, I'm feeling dumb now haha.... why does my car backfire under deceleration?? I've heard its from running rich... I know that I am, but when I make it richer, the backfiring goes away.... anyone have any suggestions??

[jmortensen]

Are you talking shotgun sounding backfire, or are you talking about the burbling noise on decel? Burbling noise is totally normal especially with a big exhaust system on a performance tuned engine. Shotgun sounding backfire is usually a result of an exhaust leak that ignites unburnt gas in the exhaust.

[Dreco]

Are you talking shotgun sounding backfire, or are you talking about the burbling noise on decel? Burbling noise is totally normal especially with a big exhaust system on a performance tuned engine. Shotgun sounding backfire is usually a result of an exhaust leak that ignites unburnt gas in the exhaust.

It's blurping noises with an occasional POP,

[jmortensen]

Leave it alone and learn to love that noise. Richening it will make it lessen a bit, but it isn't a problem and your mixture should be set to make the car work when you're accelerating, not decelerating.

[Chino 240Z]

Decelerating down through the gears shows these cars character.

Ya gotta love a sports car with a little character. And the occasional "Pop" is the car asking for alittle more attention like- "Hey! Look at me."

Love it!

[Dreco]

cool, I like it actually, but I just wanted to make sure it wasn't something to really be alarmed about

[MarkDixon]

I paid alot of money to make my car have that sound.

3 to 2 headers, 2.5 inch exaust, turbo muffler, and a major tune up.

I love it when I down shift.

Sometimes on the highway I will speed up a little, (ok maybe alot) so I can let off of the gas pedal and here that sound at high speeds.

Sounds like your car is running well.

Mark

[nwcubsman]

If you want to lose the popping sound a resonator in the exhaust system will get rid of it, and about half the volume.

[280~Master]

Sometimes the valves can get fall from proper adjustment. You may want to check them just in case. You my have a nice gurgle but a loud pop is not what you want. I would start with the valves. Just did mine tonight. How fun it was:)

[=Enigma=]

A beautiful sound it is. Roll your window down more often and enjoy it. That is if you aren't too busy getting asphyxiated by the exhaust fumes.

[77 Z]

Ah man thats one of the reasons for driving a sports car, enjoy the sound as well as the looks you get from others wondering whats under the hood. Nothing beats the down shifting sound that a Z can produce when you have a set up to enhance it.