Just to confirm, when you rev the car, the dump valve shuts then opens a little as the revs drop, is that correct?

When I took it off and cleaned, the valve springs back nicely so I assume its ok.

Just so I know, what's the worst scenario here? Presumably a blown turbo? How much are they? Is it a big job? Do turbos go often?

Cheers

 

Did u tried with wastegate? Usually is not dieing in 1 moment... It starts to get weaker... Start leaking oil... Dump valve is shutted... than with preasure opens to release air and than shutts...

 

Yes I pulled the pipe of the waste gate and it still didnt work. Should I be able to move the waste gate by pulling the shaft in and out ?

 

I do hope its's not anything major, can't believe it is as I parked the car up yesterday working perfectly then this afternoon it doesnt work then does, now doesnt at all!

 

It move quite hard... but u should be able.. Maybe I messed up and in default wastegate is closed, not opened... Than u need 2 unplug on of vacum tubes from solenoid...

 

Now I remember, when i had MY96, than we had loose tube on solonoide, witch came off... And suddenly I had 1.6 bar boost...

 

Can someone clarify how the car should run if the turbo wasnt working (which it isnt) I can't help feeling that there is something more wrong.

 

It just runs like 2.0 liter atmospheric engine. And it doesent boost at all...? What gauge is showing...? Does it have atleast vacum?

 

Update !

I took off the boost solenoid, tested it with a 12v supply and all worked perfectly. Cleaned it anyway, disconnected the battery whilst doing this, all back together and its working fine!

Not sure if it was the boost solenoid or the battery disconnection or just coincidence ?

The car does seem a little lumpy off boost but once past 3000 it flies, could this be because I reset the ECU?

Duncan's back from Cyprus tomorrow so he said he would give me a call to go through it.

 

Update.

Met up again with Duncan on tuesday so he could check everything through. Sod's law, the car was running well at the time!

Everything looked ok but he reckons the rattle / knock is my up pipe, possibly confusing the ecu which then retards the timing to compensate which would explain the intermittent problem.

Im off down to Triton next Wedensday to have an STI up pipe fitted, Duncan will be there and will check it out again once the up pipe is fitted.

Hopefully it will solve the problem, if not it seems worth doing anyway for a quicker spool up.

Big thanks to Duncan for all his help!