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Discussion Starter #1
Hello everyone.

Ever since I had the head decoked under warranty in May, EGR replaced, new inlet manifold the lot, the boost has almost always peaked at 1.3ish bar at 2000 rpm before dropping off to half way suddenly...

I realise this is probably just how the engine works, but I thought it might be a duff EGR valve they installed!
 

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I'm having similar issues, definitely not a characteristic of the car. For me it looks like turbo is on the way out. It should boost to around 1.5 and hold and only drop off when you start getting towards red line.
 

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Discussion Starter #3
only ever does it in 2nd or occasionally 3rd tho...I'd put money on it not being my turbo..but good luck with yours :)
 

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I hope its not your turbo! What reg is your 159 i.e is it a 210 or 200 model. When you accelerate gently in 6th for example, does the turbo boost climb all the way up without dropping down at any point? Does sound like mine is far worse/different issue to yours.

Good luck!
 

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Discussion Starter #5
210, and other than that, the boost reacts exactly as i would expect partial throttle partial boost, mash your foot down..full instant boost.
 

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Yep defo sounds like a different issue then. If i put partial throttle in any gear even if the revs climb all the way to the red line, the boost will go maximum halfway and wave up and down. Its going to be an expensive christmas :(
 

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Discussion Starter #7
Bit of a bummer, but they are honeywell turbo's aren't they?

I'm sure i did a bit of research..and I think the price was about £600 for a new one...but I would imagine, there are any number of companies that will recondition yours for less than that.

Sounds like your variable vanes are either coked up or the actuator is knackered...

But as said, a turbo specialist would be able to refurb it for you.
 

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Its not a Garrett no. I have a Borg turbo (BV50 KKK). Thats the major difference between the 200 and 210..... Your turbo spools up much quicker than the borg on my Brera. If the turbo needs replacing, rest assured i will be going for the Garrett (honeywell) :)
 

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Hi Moel,

You have the exact same issue I have, only mine still does it after re-map, DPF & EGR removal. The reason I had the work done in the 1st place was to do away with the "surge" you describe, but it didn't.

Does yours pull through the 1800-2000 rpm area cleanly when you "hoof it" a bit?

I've posted on stefancirillo's own thread as well about this trait/fault.

I've also had inlet manifold / throttle body cleaned, an EGR blanking plate made and fitted, turbo vacuum tested for leaks and a new turbo soleniod fitted, all to no avail.

Just spoke to the re-mapper, Gus, today and it looks like we have done everything we can to eliminate all other options and we are now at the last resort, sticking turbo vanes.

Already spoken to my local independent, Gareth at Northern Alfa Performance in Maltby, who has done all the post re-map diagnosics and remedial work and it looks like Gus has confirmed today what Gareth was already telling me.

Will let you know how it goes. Looking at a bill, just as well I trust Gareth, just didnt want to believe the bad news he was tellling me :cry:
 

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I'm thinking the damage was done during the 85000 miles the car did with the EGR/DPF etc. If after the new turbo has gone in, the car is still doing the same thing, i think i might cry lol. Doubtful though as it looks to be getting worse. If i put half throttle from say 1000rpm to 4500rpm (so red line) at no point will the turbo go over 0.8bar. If i put full throttle it will spike at 1.5bar but then drop off suddenly.
 

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That does sound like my experiances with a VAG 1.9TDi

My wifes Galaxy was fine untill someone drove up the back of it. No real problem other than it was off the road for best part of a month. Week before the approved repairer would look at it then ages for them to get a new boot.

All back and shiney but unfotunately every so often when accelerating on the motorway suddenly no power and the ECU warning light on. Quick google comes up with Variable vanes sticking and ecu cutting all Turbo due to a overboost situation. On the VAG the ECU would disable the turbo completely untill you restarted. Anyhow answer was effectively a italian tune up. Get the turbo as hot as possible by loading the car up nice and heavy then driving down a clear stretch of motorway accelerating and slowing again. Every time the turbo overpressured turn off and on again and continue. This over about an hour cleaned off all the hardened carbon of the Variable vanes and I got away without having to replace the Turbo.

Obviously hadn't liked the month sat doing nothing!!
 

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Hi Daniel350,

Mine has never thrown an error mesage or gone into the dreaded "limp mode" before or after the re-map etc, so won't be able to do the "overpressure and restart trick", but have run up and down the M1, M18 many times booting it up and slowing down, no joy there.

I did give the Brera a decent run, drove from Rotherham to Orkney and back, stopped twice on the way up at Gretna Green, then Aviemore and twice in the way back, Fife and Newcastle and managed to really hammer along in the empty Highlands.:D
Nearly 1,000 miles in all on that trip and still no difference.:(
 

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Ive been looking for an excuse to put the newer 210 turbo on mine anyway. I just hope that resolves it! Would be amazed if it didnt..... I even decatted my car and fitted straight through exhaust as thought that would help spool up. But no change :(
 
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