Whenever I turn off my car it always backfires. I think that there might be too much fuel getting into the engine, or the carb.. What can I do to stop it from backfiring? Thx

 

um im pretty sure thats normal

 

Well afterfire is usually caused by timing. It could also be too rich a fuel mixture. What is the year of the car?

 

Usually exhuast leaks with a high idle will do that. I know, because one time a pin-hole developed on a wield on a exhaust flange on the muffler and after I rewielded it, it no longer did it.

 

Its a 79.

 

Hey Zeek, the best Rx-7's were made in '79 and went down hill from there![that should get some responses!]. My '79 has a 13B and like Rohlfr a faster than normal idle can cause it to backfire. Ususally any form of backfire is something firing your mixture besides your spark plugs. Most of the time it is a carbon build up so just check your plugs and just make sure the carb is in tune. Sometimes just a design of exhaust can cause it as mine has very large extractors on it and still occasionally 'flames on' when hot. It's a rotor thing!

 

If you've not removed the "reactive exahust manifold" from the car there's a little air bypass valve in there that causes all sorts of fun "BANGS" and what not when it goes amiss.



Also make your car smoke like mad from that area.