I have a jackson racing supercharger on a b15b7. It runs great, awsome throttle response. But for some reason it redlines at 3500rpm. Im running stock 90 si computer with a DOHC ZC wiring harness, i am alosu running the DOHC ZC injectors. I put a meter to my grounds and they are going bazerk. Can anyone please help me?

 

 

Those nutty grounds...

What does it do when it hits 3500rpm? Any CELs?

 

It freaking goes to 3500rpm and dosnt go any further. cels?

 

Check Engine Lights

Does it get to 3500 and spit and sputter? make any finny noises or does it feel like the normal rev limiter?

 

yes there is check engine light. Its throwing codes 4 and 9 i believe. It will go to 3500rpm and then bounce off of it. And no it does not seem normal, i should be going to 6400rpm.

 

anyone?

 

CEL 4 and 9 or 4 and 8. if it is 4 and 8 , then the plug for the TPS and the MAP sensors are switched.

 

lol that will def do it! Common mistake tho as the plugs are interchangeable.
My next suggestion was going to be check the MAP sensor if it has the right vacuum source.

 

always fix those CELs first before you attempt to diagnose anything else.

 

Naw man there is no way u can mix them up cuz tha wires arnt long enough ta reach.