Backfire

[rsam240sx]

Hey,

My 1995 240sx is backfiring at 1,500rpm. Usually when I am slowing down, and leave the car in gear it does this. The car is stock except for a cat back system. Not sure what kind of a system it is, it was installed by the previous owner, looks like a custom job.

I am not 100% sure if it is indeed backfiring; it is a pretty loud popping sound. I find it very annoying and would like to fix it. Any idea on what could be causing this problem and how I can fix it?

TIARick

[1991S13]

Welcome to NICO...

In the future, search and you will find what you're looking for quicker and easier. Click the SEARCH button in the upper right corner of the window...

Backfiring is normal, you just don't hear it with stock exhaust. When you put on a larger diameter exhaust you will hear it, mine does it quite a bit too.

One time a plug wire mysteriously popped off the distributor and that made it backfire loud as a shotgun, but that comes with severe powerloss, shaking, and so on.

Don't worry about it.