Well i have a EF with a fully built 2.0 LS....the car was running fine till yesterday when i decided to hit my max speed...well i got to it, my computer let me know, but then my check engine light turned on, and my car couldnt pass 4000 rpm, and then it would turn on and then off, sometimes say on for 5 minutes but turns off, when i let it sit for a while, the car runs ok...but still wont pass 4000 rpm...WHATS wrong i need help...

 

check the cel/code.

 

how is that?