2004 TDI 90 Sudden loss of power. Limp Mode/Warning Light?

A good honest appraisal from Steve then Chris - good result !. I may consider his services in the future. :)
 
He's a decent bloke I will definitely be using him again. It's the other side of Wakefield for me but it's worth it in my opinion. It was great to talk to a mechanic who knows the A2 inside out
 
UPDATE: Problem still remains unfortunately. On Monday morning I approached the dreaded hill on the A64 and like clockwork it went into limp mode. So it's not the turbo vanes or leaking pipes. The sensor that was cleaned hasn't improved it so onto the next step, whatever that is haha. Car going back to VW specialist on Friday.
 
Sorry to hear this Chris - i hope this problem can be resolved. I have replaced both the MAF and MAP sensors and this seems to have done the trick !. :)
 
UPDATE: Replaced MAP sensor today so will see how that goes. I can only really test it properly on a Monday as it doesn't happen unless I'm on a motorway. Next thing to consider replacing is the solenoid valve which ironically has been replaced in the past on my A2
 
Something which behaves very similarly to a faulty MAP sensor is having an air leak downstream of the sensor (i.e., if the air is bypassing the filter and sensor, the sensor will have a low reading). Although it's usually obvious. I experienced it on my old A4 - it looked as if someone had clipped the ducting with an angle grinder.
 
Looks as though the MAP sensor wasn't at fault as unfortunately as of this morning the problem still exists. I will have to take it to the garage again when I can get booked in. I've already spent £200 but will persevere as it needs sorting. The odd thing is if I never did long journeys I would never be aware of the issue.
 
Thanks for the update Chris - sorry it didn,t work. From a personal point of view I,ve often wondered how much it would cost to replace every single turbo pipe just to be on the safe side and for peace of mind. :confused:
 
I found this procedure cured my identical problem on my AUY 1.9 PD Galaxy when it was almost I drivable due to over boost. Drop the exhaust down pipe off & spray mr muscle oven cleaner in the exhaust port of the turbo taking great care not to get any on you or any of the car, work the actuator mechanism vigorously to free up the vanes , leave to do its prescribed job of carbon removal, repeat if necessary , replace down pipe & linkage then give it a very spirited drive to the redline once warmed up in 3,4 & 5th gears
Whilst observing relevant speed limits.
Car has done 206,000 miles now & has never been as responsive .
 
Just reading this thread and although it's a 90 with the problem the lad has I was wondering if the Mr muscle idea is a good one and if so how would it be done.
 
johnyfartbox said:
Just reading this thread and although it's a 90 with the problem the lad has I was wondering if the Mr muscle idea is a good one and if so how would it be done.
Click to expand...
not tried it myself but my reservation would be is the chemical makeup safe for all internal components of a turbo and what residue is left after using it
 
Don't let the caustic cleaner come into contact with the bearings! Not sure how you would do that!

RAB
 
From time to time, when conditions are suitable, “Drive it like you’ve stolen it” Dave ;)

All the best, Andrew

PS I’m now running cheap as chips supermarket fuel: Morrison’s and Sainsbury’s are the cheapest around here; 20p/litre cheaper than the premium stuff I was running to fix my ‘limp mode’
 
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