Backfire Blues
 

Help!, I have an RX-7 I am currently selling, and I just finished putting in a new clutch disk, so I took it for a drive. It was running beautifully, and I had a friend with, so I decided to pull a burnout (my car is stock but tires are horrible, so I can burnout). Right after I pulled out of it and let my foot off the gas to shift, there was a 3 massive backfires (not those little ones you get from not having exhaust). Now whenever the tach is falling, or when I engine brake, I get massive backfires, and the car doesn't sound even or healthy when it idles like it used to. I hope this is something I can fix, or the value of this car just dropped by about 1/2. The only time you can tell something is wrong is when it backfires, or when it idles. Otherwise it is fine. BTW, I have NO exhaust, and I did not go over redline on the burnout. Thanks in advance.

Also, this is a 1979 first gen.

I think you're supposed to break in the clutch for about 500mi. before you wail on it.

and man, that must be LOUD with no exhaust. do you wear earplugs?


b-rad

Vids!!!

Ya, I always push in the clutch and let off the gas when I pass a cop or I get pulled over, and I realize it was stupid, but I don't think the backfiring or idle has to do with the clutch.

vids??

vids = videos of it so we can tell what's wrong or what happened...

Welcome to world of rotaries!
Brap brap brap boom brap brap!

yea that's normal. that stock catilytic and the air pump shit are anti-backfiring.

I did the same thing with my new 81, and took it for a drive down the street and back since this was the 2nd test drive since I got the car in it's non-running condition. the backfires were heard from a block away and I made a little girl cry ;)

but to answer peoples questions, open downpipe on a rotary is SUPER LOUD. and I drive a honda that is open header right now, definately not as loud as my 12a beast!

i'm working on putting on a new straight through exhaust to stock muffler before I drive it home from the shop >_>