Backfiring problem

[Ericfuegen]

Hey everyone thanks for lookin in advance! Okay I have a stock civic dx, and it backfires but only when I have it matted! Once in a blue it will do it when I'm driving normal, my buddy told me possible air leak somewhere, anyone know? Thanks again

[ManTyme]

bad sparkplugs/wire/dizzy cap/ rotor

[Billitary]

Test what he said and get back to us with what you find

[PH3R33L]

Deff the dizzy take the cap off and check there are 3 8mm screws mine was doing the same

[Tate2k]

o2 sensor all so bro put it on a computer at advance auto

[CTgoldhatch]

it is the dizz i had the same prob on a stock DX and it drove me crazy i put a autozone dizzy on it and it did that same shit i went the the junk yard for one and ir fixed it

[kbrown!]

Does it smoke at all?