I have a 93 rx-7 which has been rebuild and streetported and has a single turbo conversion, with full racing beat exhaust no cat and also an intake. 12Ib. alum. flywheel, FMIC, and T04 H trim compressor wheel and a Koyo radiator. I'm really not sure what the problem is.....

I have a terrible fuel cut problem it seems to cut my fuel once my boost is at about 15psi while my rpms are climating....in which results in a lot of smoke and I don't think is good for my engine. Its cutting the fuel and then dumping more back in once my boost drops back down, and continues the process up into redline in every gear....I had to down tune it with a boost controller so I am running about 5psi in 1,2,and3gear(I think) and 10psi in the higher gears. I plan to get a speed cut controller which im hoping it will help.

GReddy BCC & SCC allow the factory ECU limiters to be eliminated. These preset controllers are designed and calibrated for a specific application. The units must be wired directly into the factory ECU harness


If that doesn't help then I plan to get the e-Manage (piggy-back fuel computer) which is an inexpensive programmable fuel management system that allows you to properly tune your factory fuel system, without having to change the entire factory ECU system to an expensive "stand-alone" unit. Which taps into most factory ECU wiring and it still utilizes the existing sensors.

Any suggestions? Tips? or Comments?
Any help of any kind would be much appreciated...
-Thanks

 

With those mods I think you would be better of with a standalone system, like Haltech E6K or Autronic SM2.

 

That was my first option untile i saw the price.....which is why I'm looking at the boost cut defenser and the piggy for the ECU.

 

I bet those other mods were'nt cheap either...

 

do you know how much boost can the stock ECU handle?

 

I have no idea..