Need engine help experts

[Phantom32]

hey guys, i'm having some huge problems with my car and i'd appreciate it if someone could help me with a diagnosis.

These problems generally appear after i drive the car quite hard. Its a 93 R32 gts-t with a Ceffy rb20 in it. Minimal mods, VG30/RB25 turbo, FMIC, SSQV, Zorst, BB Clutch, Stock boost.

1. Idle - Revs drop to about 100-200 on idle, spike back up to bout 1500, then drop again. It does this over and over again on idle. AFM's been cleaned, idle control adjusted, fuel pump changed. Idle control helped a bit but the problem resurfaced again. When approaching the lights, drop it into neutral - revs drop, car stalls.

2. After driving it hard, sometimes acceleator elicits no response. Pressing it down, no revs, nothing. Silence. Then the other night, at the lights ready to take off, put her in 1st, press acc and the revs dropped. they didn't pick up, just kept dropping everytime i pushed the accelerator til she stalled, then wouldn't start up again. Had to roll her down a hill, wait 5 mintues, then she started up again.

Now, i've changed most things on the car as stated above, but the problem still sits. Is it possible that a very worn out turbo can cause all of this? My current turbo (VG30) is about to die and is spitting alot of oil into the pipes.

Can oil from the pipes seep into the engine and cause much damage? If so, what sort of damage?

Sorry to drain it but this problem doesn't seem to be going away. Any help from anyone would be greatly appreciated. The car is a bitch to drive atm - keeps stalling on me.

Thanks again.

[Abo Bob]

Have you checked you AAC Valve?

[Phantom32]

yeah, i tried to check that but its seized so i gotta go get that taken out. Do you think that that would be the sole source of all the problems?

[Abo Bob]

It could be but I don't really know. It's a sort of an educated guess.

[Phantom32]

thanks for your help mate.

Anybody else have any ideas? I'm sorta desperate here....

[R33S2]

Can oil from the pipes seep into the engine and cause much damage? If so, what sort of damage?

Burnt oil on valve stems (exhaust) can cause slow valve response and/or sticking

[WazR32GTSt]

maybe its a fuel delivery issue?

fuel pump / regulator?

could be the AAC valve. if its sticking then all sorts of idle issues... but that wouldn't explain the accelerator issue

hope that helps

Warren.

[Phantom32]

modr33s2 - thanks for the reply. the turbo is quite tired so it could be very possible that that has happened - however i'm not going to find out until i take the head apart eh? Damn....more work....

Waz - i replaced the fuel pump to a warlboro item and it seems to not be that. WHen i opened the fuel tank, i found my fuel baffle floating around -wtf?

the person i bought the car off is one dodgy muta f*cka. some ppl here know who he is, but i don't wanna name names.

thanks for your help guys..

I'm considering doing the rb25 conversion (new engine, no hassles) - anyone know where i can get a good reliable half cut? I've checked upimports and just jap, could any of you guys point me to a few other places?

thanks again