Rb25Det S13 Rev Limiter Issue Please Help!

[johndanyal]

So ive been having an issue with my rb25 rev limiter and i cant seem to figure out what the problem is exactly. pretty much the car will pull amazing up until redline but it will not bounce off the limiter, instead it sounds like some sort of soft cut but it will bog the car down until i let off the throttle. i can get the car to hit the limiter when doing a standstill burnout in first gear or sometimes while doing a pull in first gear but it will not bounce off the limiter in any other condition. if i get back onto the throttle it will pull up until redline again and do the same thing over again. ive replaced the fuel pump (walbro 255), fpr, fuel filter, spark plugs (gapped to .8mm), and ive checked the coil packs and they dont have any cracks at all, ive also replaced the ecu, maf, and coil pack harness with known good ones and it had no affect. this issue has been happening since i completed the swap in january but randomly went away and it was bouncing off the limiter for about a month or so but then it started happening again after a day of drifting. also the wiring was done by an extremely reputable shop so its unlikely for it to be a wiring problem but who knows. someone plz help. this is my drift car i beat the shit out of it, thats what i put it together to do so please dont lecture me on engine abuse. i also do not have a wide band AFR installed (stupid i know)

Also the engine is out of 1996 r33 so its a series 2, it has an e60 maf and a G8 ECU

Edited June 7, 2014 by johndanyal

[GTSBoy]

please dont lecture me on engine abuse.

Um, then why should we care? Soft limiter sounds good for the engine. Kudos to your engine tuner I say.

[johndanyal]

The only problem is it bogs the engine down. It looses power and RPM's unless I get off the throttle and back on.

[johndanyal]

And the engine is not tuned. It is literally all bone stock minus the FMIC

[Ben C34]

How much boost?

[johndanyal]

the boost is at 7lbs. it is running the factory wastegate actuator

[Ben C34]

Check for boost leaks by doing a pressure test.

[johndanyal]

I'll do a pressure test but I doubt there's a leak. It will hold full boost In any gear at WOT all the way up to redline with no problem, it does not cut out or hesitate or do anything funky. It idles perfectly and doesn't missfire at all. It just will not bounce off the limiter. It's the strangest thing

[Ben C34]

Holding full boost and idling fine does not rule out a boost leak at all.

[johndanyal]

Holding full boost and idling fine does not rule out a boost leak at all.

No i totally agree with you. I'm just saying it seems slightly unlikely to me. But i'm willing to try anything at this point

[GTSBoy]

e60 maf and a G8 ECU

And the engine is not tuned. It is literally all bone stock minus the FMIC

Explain?

[johndanyal]

As in it is not running an aftermarket computer. It is running the factory computer and factory tune