An Interesting boost problem

bobster · May 24, 2004, 11:28:56 PM

I haven\'t heard of this problem before but last night I lost my primary turbo. I pulled out to pass some traffic on the motorway and I had no boost till I hit 4500rpm, and then it only hit about 0.4 bar.
I had dig through the vac hoses tonight and replaced 1 hose with a split. There may be more in there, I only replaced them about 4 months ago with silicone. All I have on the car is an exhaust and a PFC and a Blitz dump valve.
Any suggestions?

I\'m kind of sad because rotorstock is just round the corner.

bobster · May 25, 2004, 12:16:57 AM

I checked the turbo control actuator, as this was my problem last time. The circlip is still on the arm and the arm is out at Idle, which is where I think it should be.

It doesn\'t even sound like the primary is spooling up.

BlitzBoy · May 25, 2004, 12:46:35 AM

BOOST LEAK!!! same happend to mine, check your intercooler pipes and couplings!!!

bobster · May 26, 2004, 12:08:38 AM

Nope, no joy. Checked all the large diameter hoses and likely places for a boost leak and nothing.
I don\'t think the primary is spooling up at all. What is likely to cause that?

BlitzBoy · May 26, 2004, 10:31:53 AM

did u have a loud whoosing noise when driving?

did you take off the rubber coupling coming out of the "y pipe" of the twin turbo pack and inspect it?, the tears normally occur where the jubilee clip is, the clip normally hides the tears, so take it off and have a good look

bobster · May 26, 2004, 06:07:16 PM

No whooshing.

bobster · May 27, 2004, 08:17:28 PM

Fixed it today so I will be going to the ball This weekend:D

Just got to sort the fueling and I will be even happier

20B_boy · May 27, 2004, 09:05:28 PM

Poor old robbie\'s is a busy boy!

What was the problem Bob?

bobster · May 27, 2004, 10:41:34 PM

The Wastegate actuator rod had come off of the wastegate door. There would have been no exhaust gas going to the turbo because the wastegate door was just flapping around. Managed to get it back on and put a new circlip on, not the easiest thing to do.
I had a similar problem before when the secondary wouldn\'t come online. It turned out to be a similar problem where the rod had come off of the turbocontrol actuator.

And the moral is never buy japanese circlips.