Well I'll make a long story short. I have an 02 WRX Wagon. I went cheap and bought a MBC TurboX. It ran fine except for the fuel cut. So I went and bought a HKS FCD (Fuel Cut Defencer) model K3. I hard wired it to my ECM and it did not work right at all. I doubled checked to make sure the wiring was where it needed to be, but was disapointed by failier. So I removed it and now I can't even go higher than .75 bar without the car sputtering and misfiring. I unplugen the battery to reset the ECM, still does the same thing. I took of the MBC and it still does it at max boost. Can someone give me an idea what to troubleshoot or what might be my problem?

 

Hmmm, what you've done is pretty stupid. You've get fuel cuttoff for a reason. Then you went and disregarded it with the FDC. You must have been running at least 17 PSI, if not a lot more. Do you have any other mods besides this MBC and this FDC?

How do you know your car is misfiring?

Check all of your vacuum and boost hoses. Sounds like one might be popped off and that you most likely put the hoses back incorrectly when you took out the MBC.

jason

 

oh and take out the stupid FDC. if you want to raise your boost do it right. this is not the the right way.

 

I have a downpipe, N1 Exhaust, Apexi Intake and up-pipe. I was runing it at 1.25 Bar.

 

Take out the intake and the fdc. make sure all your hoses are on right.

Once things are OK, you can put the MBC back in. Don't boost more than 16psi. It wont do you much good anyway. Sell the FDC and intake.

Save your pennies and go buy a bigger turbo, injectors and utec.

jason

 

Will do! Thanks.