group 11 vagcom log

[chips]

Hi all

I know I'm a pain with this diesel malarky but I am very unfamiliar with diesel engines, mine is a 1999 110bhp AFN with 140k but it wasn't until I drove another one that I realised just how bad mine is. The Alhambra I drove was a 90bhp with an AFN engine, same year as mine, but with more miles, and this car drove 10 times better than mine.
I have no power low down, and my turbo takes a long time to come in, it don't feel it come in until around 2200-2500 rpm.
I swapped out the MAF from the 90bhp to mine and this made a difference, not huge but very noticable, my car is a lot quiter and has a little bit of power low down now, but still nothing like the 90bhp I drove. I have a brand new MAF in the car now.

I have logged group 11 with Vagcom and would be very greatful if anyone would take a look and tell me what they think. I assume that the curves should all have some relation to each other.
I can see the obvious, what looks like my turbo pressure is only dependant on my rpm, and that the duty cycle of the actuator is doing little to nothing. Also the specified compared to the actual boost pressure look like they are on different journeys, but I don't really know what this means, sticky vanes, or boost leak, or duff actuator or .......

Here is the fault code thats logged.

17958 - Charge Pressure: Control Deviation
P1550 - 35-10 - - - Intermittent

Just to add, this graph was from a standing start, then 3rd gear to just over 4000rpm.


18162

I would appreciate greatly any advice or pointers as to where to start with this.

Many thanks


Chips

[Doctle Odd]

All AFN engines are 110's. Start with a tin of Wd40 on the actuater and work it until its moving freely. Check the vanes on the turbo are clean and moving easily if not clean them with carb cleaner or mr muscle oven cleaner. Clean the inlet manifold, you can safely block the egr on these engines, just pull off the small pipe and block it with a screw or bend it over and tape it. Is the car correctly timed?

[Crasher]

Your turbo needs a rebuild.

[chips]

Thank you both very much for the quick replies.
Paul, I have no idea if its correctly timed. Is there some way I can check this ?
Please forgive my ignorance Crasher, but when you say a rebuild, what does it entail and what should I be looking for ?
Sorry for all the questions, but I am learning.
Thanks again for the replies, I appreciate them.


Chips

[Doctle Odd]

Because of the way these engines are timed they can be off by 1/4 of a tooth. The engine would start but be down on power. You can check the timing to a fair degree of accuracy by removing the top timing cover and the rocker cover and check the marks are aligned. If you see blobs of tipex it is probably off. You really need a dial gauge to set the VP pump accurately.

[Crasher]

A turbo rebuild at a typical specialist will be strip, inspect, media blast, new seals, rebuild.

[chips]

Hi all
I have enquired into second hand and recon turbos and have been asked weather mine is a 3 or 4 stud, can anyone tell me how to find out or is it a case of taking the turbo off, also what turbos would be a direct replacement for mine ?

Thanks again for any help, I do appreciate it.


Chips.

[Crasher]

They should not be asking those sort of questions, they should be asking the part number of the turbo you require such as 028 145 702 P which is a Garrett 701855-5005S.