vipcivic

i got a 1993 rx7 tt,for the mods its got greddy intercooler piping with front mount,full 3" greddy turbo back,apexi air filters for turbo. when the car is warm and i try to hit the gas it starts backfiring and feels like its bogging up. but when i hit the throttle slowely the rpms got up with out any bogging or backfiring. when i had the car like quarter way warm today ,i floored it and it was going fine but later when it warms starts doing the same. what could be the problem, could it be becuase it needs a tune??? help me get some answers

dgeesaman

iTrader: (7)

Are there any stored codes?

When you say it needs tuned, what exactly do you mean by that?

rmnesbitt

did you get the FMIC, Intake, Exhaust without tuning the ECU? If so remember the three mod rule. You will need a tune, it sounds like the fuel map is off. You might be running lean in WOT or High RPMS. Do you have an aftermarket ECU installed if not I suggest the Apexi Power FC. RX7store.com has them for a good price and they will tune it for you for free if you tell them your mods.

vipcivic

im running the car on a stock ecu with the mods i have fmic with piping,3" turbo back exhaust, also im putting on the apexi intakes , so i will need to go get it tuned then

dgeesaman

iTrader: (7)

The "3 mod rule" is approximate and does not account for all things with the same conservatism.

A 3 in turbo back exhaust is really 3 bolt-in mods (downpipe, high flow cat or midpipe, and cat-back). If you have no cats at all, (midpipe) I'd count that as 4 or 5 in the exhaust alone. An intercooler is a mod or more, and an intake is yet another. So if I were keeping count you have 4 to 6 "mods" installed already.

Do you have a boost gauge installed? What boost is it operating at now? If it's exceeding 11psi you should not install the intake.

David

vipcivic

vacuum on the boost gauge reads like 15-16 psi, i think boost went up to about 10 psi when i floored it that one time it went

dgeesaman

iTrader: (7)

I would expect the boost to be higher when you're getting hard into the throttle and it cuts out on you.

Okie-RX7

iTrader: (1)

I had the same problem and it turned out to be a bad coolant temp sensor. It would show a correct value on the PFC when it was warming up, but when it fully warmed the sensor it would show open and put the car in limp mode, also there was no CEL, or stored code when it happened. I would recomend getting a PFC and going to the sensor check function and see what your sensors are showing.