car backfires when left in gear during deceleration. Popping ceases when clutch is depressed. Any diagnosis? I heard it could possibly be an exhaust leak.

 

Engine braking is slwoing down combustion faster than fuel is burning quickly. Every RX-7 I know of does this whenever you engine brake from high rpm. Basically the stock rich fuel map and oil injection leave too much in the chambers for clean burning.

 

It could also be a bad EGR valve? a rotary will backfire allot with it being bad..

 

decelleration pops get rid of tailgaters... Especially when a nice big fireball pops out!

 

yess i get 10 foot flames sometimes mostly 3-6ft its ******* crazy I dont have an egr so ut must be my richness...ask1984se u can smell my car from 10 cars away at idle..3'' turboback no cats is fun

 

check the deceelration valve thingy

 

what about TPS ??

 

thanks for all the replies.