RB25DET problems

[XEQTOR]

Whilst driving along F3 awhile ago I noticed whilst going up a slight hill I noticed the engine wouldnt make boost. No major loud noises or bangs, just literally became sluggish.

Managed to limp it home, car drove fine until boost started to come on, once the boost gauge was reading 0-1psi the needle started to jutter and lots of black smoke out the back of the car not to mention that it jerked like a dog!!!!

Figured I had done the turbo, seems as though its had 15psi through stocko turbo over last 12months. Got car on a hoist last weekend and changed turbo to a high flow (thanx mark MRK25T), found some shaft play in old turbo but otherwise was in good condition. Hence , not turbo related!! Bugger....

Anyhows, did compression test: Cylinder 1= 150psi

2= 155psi

3= 150psi

4= 155psi

5= 160psi

6= 160psi

All these figures appear to be ok to me, hence nothing internal damaged.

whilst doing the comp test noticed that ALL 6 Iridium plugs were fouled badly by black shyte!!They had been in the car for at least 7,000km, so they were old. Got some standard non iridium replacement plugs to test the car, car ran ok. Boost guage reads 15psi fine and stable but car is running like a maggot!!! I mean the 4cyl charade i been driving around in makes more power!! LOL

Now has major sucking or blowing sound under bonnet but at moment im deaf in one ear due to an ear cleaning accident gone horribly wrong so i cant hear this noise properly.

Anyone got any ideas????

Its due for a major service, so whilst the car is at Unique Autosports Im thinking of getting them to fix this elusive problem, but would prefer to have an idea of what it is in case i can do it myself???

Thanx guys....

[nmcmahon83]

The fact its running 15psi is an issue... unless you have REALLY good cooling.

BTW, travelling up the F3, where do you live?

[XEQTOR]

I have a large front mount intercooler with cold air induction and a few other things to help it cool.

Living on the central coast now, use to live in Sydney

[Kinks]

where's the sucking/blowing noise coming from? Maybe you have a substantial vacuum leak? Any black smoke when you're up it? that would indicate it's running overly rich.

Also check the AFM isn't visibly damaged and try resetting the ECU..?

[XEQTOR]

The cars been off the road for 5 weeks with no battery in it so ECU should have been reset.

Theres shyte loads of black smoke when your up it, its definately running rich.

Dont know where the noise is coming from because im deaf in one ear at the moment due to an accident, so thats pyyssing me off to not been able to hear it properly.

Its due for a major service so im gunna get unique auto sports to look at it but going to fiddle with the AFM tomorrow morn and see what happens.