My 91/na pops out the exhaust,(like small backfires) when started cold for a few minutes until warm and then the popping goes away. My plugs are about 1 month old and wires i replaced last summer. Timing is dead on..... Could my coils be worn out???

 

its just extra fuel being dumped in the motor when its cold, its a normal thing for rx's to do, i wouldn't worry too much about it

 

^^^ yea my old N/A woudl sound like a sawed-off on a cold morning.

crank-crank-crank-pop- BOOM!!!!!!

 

my rx7 runs normal

 

SURELY, this can't be normal i've read alot of threads today and i know alot of people have this problem. But i can't believe from the factory stock rx7's did this. Ok, MODERATORS since so many people have this problem, is there anything we can do about this???

 

The problem may be your exhaust. Rotarys are known to backfire when they dont have a certain amount of backpressure. Whats your exhaust set up like?
Do you hear the popping when your driving, like if you rev it up to 6k and then wind down in gear slowing to a stop?

 

^ thats how you get flames

 

have 1 year old factory exhaust setup including cat to muffler from autozone. All emissions are still there with bran new acv.

I read one thread saying that the coils could be getting weak causing this popping only when cold. But what i thought is that coils don't get weak they work or they don't right???

 

oh, and no to the question on popping when driving