Help!!!!!

[sumfatchin]

my RB25DET is running like crap!!!!!

When it first comes on boost, it goes hard for a bit over a thousand rpm, then power just quickly fades. It's still boosting hard (according to the boost guage at 10psi), but good accelleration is just not there!!!. At high revs the engine is absolutly screaming its tits off, far louder than the noise the exhaust is making (only have 1 rear mufffler). Im getting beaten by soo many cars that i should be able to smoke!

Any ideas as to what the problem could be??

please help, this is so frustrating! im considering selling the car with the amount of trouble its given me!

[sumfatchin]

oh yeah and a had an apexi bov installed the other day, but apparently its leaking very slightly

[dojobi]

Have you got any aftermarket management? if not, you'll want to get some (like a SAFC) to lean out your a/f mixtures as the stock computer really messes with your power curve when the boost is turned up a bit above stock. Put your car on a dyno to see. I know mine was like that, and so are half the skylines on here.

[silverskyline]

check ur cooler hoses, e.g the rubbers on the bends mine was doing something like that for a while and i didnt know what it was, it was one of the rubber hoses it had a small crack, i barely noticed the crack, this is a common problem with the hoses once they get a bit older

[sumfatchin]

thanks, ill check that out today.

[Sydneykid]

Hi sumfatchin, R33 ECU's cut fuel and ignition when they see too much boost, your problem is a perfect example of what this feels like. Have you fitted anything to overcome the ECU over boost cut? Say a boost cut defeater?