Hi all,

Yay, my turbo problems are back again The car has been gradually getting worse again over the last few weeks, and now when I boot it up a hill hey presto limp-home occurs again.

I have checked the actuator on the turbo and that is nice and free (just like after I cleaned the turbo up a while ago).

As VAGCOM decided to play today (quite often it won't talk to my car when the engine is running, I took the oppotunity to log a few figures. I went for channels 10 and 11 as I think they log what would be helpful for the clever people to read and understand.

I have plotted the figures very quickly here:

Link to csv file

The car pulled out of a layby in 1st (up a hill), where I changed in 2nd gear and all seemed to be ok. When I then changed into 3rd and it throws a wobbly and went into limp-mode. I completed the climb (approx 60 seconds in), and then turned off at a junction at the top (1st & 2nd) and pulled into a layby and stopped the logging.

Prior to the actual log, I got VAG-Scope to plot this:

Just for completeness: Log for the last few months.

Any ideas what I replace first? MAF, n75, MAP, or should I just hope that some thieving pikey steals it?

Thanks :-)

Edited 1 May, 201115 yr by mbames

Assuming you've not done any re-piping recently, I'd suspect the N75. Looks like it might not be actuating in time on the overrun from 2nd, and letting the boost build too much

Assuming you've not done any re-piping recently, I'd suspect the N75. Looks like it might not be actuating in time on the overrun from 2nd, and letting the boost build too much

Thanks

I replaced the most of the vacuum hoses pipework when I cleaned up the control/vanes in the turbo as some of the pipework has seen better days. Not touched it since then (apart from the split vacuum pipe to the brake servo), but that was the rigid pipe.

n75 was last changed about 100k ago, so I guess it might be worth a punt.... I guess the other option might be a blocked vacuum return/release from the n75 to the airbox, but sure I have checked that....

Anyone bought a n75 for a diesel recently?

Spotted this this ebay: Ebay link

I can't phone a deal till tomorrow prices, so I thought I could start my research now online, at least. To make matters worse, I would like to have the part by Wednesday - which I think is going to be rather unlikely :-(

Anyone bought a n75 for a diesel recently?

Spotted this this ebay: Ebay link

I can't phone a deal till tomorrow prices, so I thought I could start my research now online, at least. To make matters worse, I would like to have the part by Wednesday - which I think is going to be rather unlikely :-(

If you can persuade your local TPS to sell to you and order it tomorrow, they should have it by Wednesday.

If you can persuade your local TPS to sell to you and order it tomorrow, they should have it by Wednesday.

That is the snag, my local TPS is a good 30 miles away, and I am working away, and then heading upto St Annes in Thursday (lunchtime - from Salisbury), so unless I could find a friendly TPS place on route I think I am a bit stuffed :-(