Next issue...

when revving in neutral from idle to 1500rpm and suddenly releasing the gas, a series of popping sounds are heard. All the time. Every time. Checked and re-set the tps a million times. Tried the water method but since there's a series of events to make it happen, its rather hard to properly test for vacuum leaks.

I did however, notice that all the hoses surrounding the acv have hardened to a rock-like texture. They dont seem to be cracked, but i doubt they're holding the seal they're supposed to.

My question is, what on the acv controls this?

Second question, when is the split air mechanism active? what series of events make it occur? perhaps an explanation on it's duty cycle?

 

ACV is the anti-backfiring sensor thingy. So most likely that is the problem. Alls u have to do is take that thing off, make a block off plate, and your back-firing will be much louder and more frequent. The split air mechanism has something to do with the dual xhaust. because i have a single xhaust and the SAM has to be blocked.

 

probly got an exhaust leak check ur pipes and stuff!!! i had the same problem when i had the smallest hole in my exhaust before i replaced everything!!

 

No offense, but please read up on rx7s. It has nothing to do with the dual exhaust.

 

I know that I have an exhaust leak for sure. It's before one of the mufflers.


But I don't know how that can affect the engine misfiring upon deceleration. It sounds to me like it keeps dumping fuel, and not hitting fuel cut upon decel for some reason... (not a leaky injector, already tested for that)

 

TPS! check it may be a hair off and thats all it takes

 

already did. REPEATEDLY even tried adjusting it slightly off-course. Same crap.

 

Forget the TPS. I don't get afterburn unless I *try* to make it happen (revving the crap out of the motor ) and my TPS never gives the same reading twice.

Fix the leak and test the ACV - the procedure is in both the FSM and Haynes...

 

well whatever that was my problem, it **** up the backpressure also but what do i know!! i replace exhaust system and doesnt do it(backfire) anymore!! im sure it can be something else but like i said that was my prob!! PEACE!!

 

well can you atleast say what its for instead of just insulting me.

 

Check the dashpot on the TB.

 

sorry didnt mean to insult you, just pissed at my car

the split air pipe is for the catalytic converter for emissions, and the excess air gets dumped right into the exhaust

 

hmmm.....i wish my car threw fire....hell i wish it ran.....you have a Tii? if you have a open air BOV that will make it backfire....

Daniel

 

nope, stock aside from the wheels, speakers, deck, and boost gauge.

I have a shitload of aftermarket parts either sitting/waiting to be installed, or in the mail

 

So you gonna test the ACV or do I have to come over there and do it myself?

 

I'd prefer you do it