RB25DET half throttle

[Toad[^_^]]

I have a stock RB25DET in a '93 240sx. It idles fine around 1k rpm and there are no vacuum leaks. I have a boost gauge hooked up and I'm pushing 7 or 8 psi between 3k-4k rpms. The problem is that when I apply full throttle pressure the car won't pull over 5k rpms but if I back off to half or less throttle it pulls like normal. I have copper plugs in now and I'm going to switch to iridiums today. The engine also runs very warm. It has overheated int the past on a hot summer day while sitting in traffic on the freeway but with the cold weather it is still running warmer I would like. I don't have a temp gauge hooked up so I can't get an accurate reading. Any suggestions?

[hannibal]

I'm not an RB guru, but it sounds like your ECU is running in 'safe mode' or something. I think the overheating is the root of your problem.

[eh?]

check your tps voltage at the ecu.

[Toad[^_^]]

I thought about the ecu running in safe mode and I've reset it a couple of times inorder to rule it out. I'll try the tps voltage check. Thanks

[NissanTurboSix]

Resetting the ECCS wont get your car out of limp mode. You need to figure out why its in limp mode and fix it to get out.

[Yellow4g63]

Bad CAS? What codes do you get from the ECU?

[Toad[^_^]]

Nismo fuel pressure regulator on order. Thanks for the input