harnum2009

ok i go a 93 rx7 running on 10 psi, ok when im just driving along shes fine but when i steps on her down at about 5000 rpm she spits and sputters a little not alot but drivers me nuts and she dont have the same power!
any ideas ?
thanks Dan!

Mahjik

iTrader: (1)

A few questions:

1. Are you at 10 PSI at 5000 rpms when this happens?
2. Have you pulled the engine codes?
3. What modifications are on the car?

harnum2009

no shes at about 8 psi or a little less , but i had the car for a while now and this never happened befor ,
never checked the codes ,
greddy turbo kit and timer , apex boost controlar stand alone ecu , cat back exhaust,greddy intercooler kit .
ok some time she dont sputter at all and some times she do alot but its only when my timer isnt working and i noticed tonight that when i locks my doors the timer shuts off

harnum2009

but some times the turbo timer do count down rite and when she is shut off and i noticed that when she do she dont have a sputter, and sometimes when i turnes her off she just shuts off , and that when shes not working rite

harnum2009

anyone

KD-93R1

I would definetly see how your turbo timer is wired. There may be wires tapped into wrong locations. I would check all your vacuum hoses and make sure none of the plastic hose barbs on your solenoid valves are not cracked or broken. If the OEM vacuum lines have never been replaced I would definetly take this time to replace all of them. I like the vacuum hoses from Hose Techniques, they are top quality hoses. I know you said the problem is intermediant but I would also check to see how the boost controller stepper motor is plumbed to the waste gate
and the turbe pre control actuators. Most boost controllers instructions are not ideal for twin turbo RX7s (twin turbo Supra too) so you want to make sure you use Japanese RX7 boost controller vacuum hose routing diagram. I have this if you want to see it. My vacuum lines were originally routed like my HKS EVC-EZ
boost controller instructions showed. This may sound crazy, but it seemed like the longer I ran the car this way and the more I increased the power, the bigger the problem with the hose routing. Japanese routing is the way to go, very smooth, instant boosting with stong pull all the way.

Mahjik

iTrader: (1)

What aftermarket ECU are you using? Can you monitor your voltages with it?