FD3sqball

I just recently bought a 7, so here I am! I have always been a Mazda fan (used drive a 323 GTR)..anyways I need a little help
So here is my problem....when letting go of the gas pedal (mostly in lower rpm, around 2000) I hear a pop noise out of the exhaust(misfire). is this as I think a bad spark plug or potentially something else?

Thank you!

P.S.

Some pics of the car...and yes I am in Japan

BoostFrenzy

first time owner, long time money pit

Mahjik

iTrader: (1)

Some "pops" out of the exhaust on decceleration is quite normal on these cars (especially modified ones) but it shouldn't be too excessive. On programmable ECU's, most of them have a decceleration setting where you can adjust the fuel at that point to limit it.

However, it would still be a good idea to do the common maintenance items on the car (which may decrease the frequency of the popping) since you just got the car:

1. Change spark plugs
2. Change oil and filter
3. Change air filter
4. Change fuel filter
5. Coolant flush

Force13B

iTrader: (19)

Mahjik said most of it. I put all new wireing harness in my car, a little more pricey then the above statement but it cleared up my low end poping about (2500rpm) and made a huge difference at 3k transition and idle. My car does have 140k miles on it though.

Herblenny

iTrader: (13)

Do you have upgraded ECU or full exhaust?? If so, I say its pretty normal and shouldn't worry about it too much. Also, what year is your car?? Any of the exhaust components been replaced or stock??

FD3sqball

So it's a 1993, cat back exhaust, apex-i power intake, turbo timer...thats about it for engine performance mods