Checking for boost leaks?

[The Riddler]

Any Idea how to do this? Car doesnt seem to have as much go above 4k as when I bought it.

Exhaust is slightly blowing also, would this effect the performance alot?

[Tame Technician]

1.8T?? sounds like a MAF

Boost leaks dont really give a loss of power at the top end, a fault MAF will.

Faulty boost pressure sensor can do the same, but less common.

To test for boost leaks listen to the engine while some one revs hard and then backs off, you will hear loud hiss if there is a leak.

Also look for oil coming out of the boost pipe and intercooler, thats where the leak is if you see any

[The Riddler]

Thanks for the quick reply.

I shall try listen for the hiss over the weekend when i can draft another pair of hands in. Plan to get it on the ramps tomorrow and get the exhaust looked at/parts ordered, so hopefully that might help me find my lost horses.

The car seems to be using 1l oil per 1k miles, is this normal?

There does seem to be oily residue from the dump valve, this is my first turbo car so also not sure if this is normal.

[istoo]

The Riddler said:

The car seems to be using 1l oil per 1k miles, is this normal?

that would worry me, what colour is the smoke coming out the exhaust?

[The Riddler]

istoo said:

The Riddler said:

The car seems to be using 1l oil per 1k miles, is this normal?

that would worry me, what colour is the smoke coming out the exhaust?

I've not noticed smoke of any colour from the exhaust. Normally have a mate following behind me and he's not noticed smoke (I have asked) even under very hard acceleration.

Coolant seems fine, and not found anything that resembles an oil leek.

Car mainly does hard driving, weekends only.

[istoo]

I found two burst hoses cleaning my old 1.8T engine bay with a WD40 soaked rag, not on purpose either! one collapsed in my hand.
Agree with TameTech though MAF's are notorious.

[The Riddler]

It does have a stty K&N on it too. Not exactly in the best place for an open induction cone.

So while I'm on the subject anyone know a decent induction system? Or am I better going and getting a standard airbox?

And boost hoses, car is 14 years and over 180k, would it be worth renewing them all?

AFAIK, Had alot of engine work last year including a new turbo, so I would like to keep it in good order mechanically.