1989 GTUs

when i was driving my rx7 yesterday night, i seen this prelude and i raced it. i tached the car to 8000 rpm then shifed into 2nd. when i clutched it made a POP sound. also when i was in 2nd going about 60 and i let go of the gas to hang a corner. when i let go of the gas it made about 2 poping noise. i think the POP noise was a backfire. but im not sure. so can somebody tell me what it was and is it bad for the car.
thanks

Turbonut

iTrader: (1)

After letting off the gas, you're getting raw gas into the exhaust with the explosion occuring somewhere in the system/mufflers. Stock exhaust and cats? Engine seems fine at idle etc?

DelSlow

iTrader: (2)

that sound is your apex seals breaking. you blew your motor....

j/k, its just backfiring. NAs run rich, so you will hear poping all the time when you let off the gas or downshift. this is amplified if you have an aftermarket exhaust or gutted cats

tong53

i have a similar problem...but it is constant no matter if i an at idle or in motion...any ideas or is it backfiring then also...sorry to jack the post...but i did not see the sence in starting a new thread when it was similar to this one...i am 100% stock

1989 GTUs

but my car is STOCK with no kinds of aftermarket products

1989 GTUs

my car is all STOCK and it idles high when car is first started and drops down to about 1000 or lower

Turbonut

iTrader: (1)

If everything stock and it runs,acts, idles fine as you say, and has never done it before, I'd check the plugs first. The car will run rich, but if all stock it shouldn't backfire unless some mechanical problem exists.

RXciting

stock RX-7's still back fire alot. mine lets out 3 quite loud back fires when i let off at 7500 then sometimes just a few small ones..

LOL i think you should worry if your 15 year old RX didn't backfire at higher Rpm's

tong53

i changed the plugs cause i thought it was that but it still does it...no matter what rpms i am at....dont know what my idle is as of right now my tach does not work and didnot when i bought the car...

RXciting

it's it's too too much could it be your timing is off a bit??

does it accelerate smoothly?? does it bog or hesitate??

does it lack power or does it still pull strong??

tong53

itsmy first 7 so i am not exactly sure what it is supposed to feel like...i did notice today that first gear had more power then it had in the previous two weeks that i have owned it and it just felt better thru the first 3 gears...but still get the noise

RXciting

lol well maybe you just got rid of some pesky carbon deposits.. cleared an injector..

i noticed the same thing after i first passed 7500 RPM's when i first got the car..

FnCuLaTeR

You know thats funny I did the same thing last night when I reached 8000 rpm's it sounded like my car farted real loud..ha

joeyz87

You could have popped a hole in your exhaust.

RETed

How do you know what RPM's you're at when your tach doesn't work???
You should've started another thread.


-Ted