Its the small thing by the drivers side front wing / suspension mount? It's in the circled area below:



Aparently if it fails completely, boost will drop to 8 psi.



[Edited by matt.bowey - 12/2/2002 7:37:38 PM]

 

My dealer tells me its knackered, so its getting replaced under warranty at next service (after xmas). MY00 turbo.

 

Just wondering if they mean blow off valve / dump valve

 

Purge valve is a canister that absorbs harmful fuel vapours.

 

Isn't that the boost control valve/solenoid thingy...? If that fails, your car will only boost .5 bar or so.

Purge valve...haha..sounds like something your urologist should be able to help you with...;-)

 

Purge Valve would usually be refering to the evaporative emmisions controll system purge valve, (in 97-98 cars its located on the underside of the inlet manifold). This is the valve that allows the ECU to purge the carbon canister of fumes at the relevant times, the canister itself is quite seperate to the purge valve.

If the valve you are refering to is in the location circled in the picture above then it is either the pressure source switching valve or the wastegate control solenoid, assuming it is actually a valve.

The pressure source switching valve allows the ecu to switch the MAP sensor source to allow it to sample atmospheric pressure instead of the default source, manifold pressure.

The wastegate control solenoid allows the ecu to bleed off pressure feed to the wastegate actuator, this letting the control boost pressure to over and above the natural wastegate pressure.

Moray

 

If failure of the valve in question will cause boost to be limited to ~8psi, they will probably be refering to the wastegate control solenoid valve.

One would hope that it fails that way, rather than locking open and thus letting your car boost itself to death, or rather slam into the overboost cut everytime you put your foot down. eek.