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Discussion Starter #1
Hi all

Been having a long term issue with starting my T4 after timing belt replacement. I've been on a merry go round of rather useless so called 'specialists' who have not been able to solve the issue.

Can anyone advise if they themselves or know anyone who properly understands these old engines and their foibles in the Bedford area please?

Any help would really be appreciated :)

Kind regards, Simon
 

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Hi
For a good setting of the pump you need a computer with the program vag.

Odoslané z Mi 9 Lite pomocou Tapatalku
 

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Remove the plastic cover
2 x m8 bolts
Warm the engine to more than 74 degrees
Plug in the computer vag
01 Engine
Press go
You will see ten windows with a ratio
Press tdi graph- lower right corner
You will see a graph the shoe should be between the red and yellow line ideally on blue but it is very difficult
Adjusting
2x Spaner 21
Hold nut on fuel pump and loos Bolt on camshaft wheel
Move the pulley on the pump about two mm up or down
Tight Bolt on camshaft
Štart
Check TDI graf
Continue until you are between the yellow and blue lines

Odoslané z Mi 9 Lite pomocou Tapatalku
 

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Discussion Starter #7
Hi again!

So. I had a mechanic recommended to me who came and spent 7 hours trying to get the timing in spec today.

When plugged into VCDS and measured in basic settings it started at 255 ‘too far advanced’

He then retarded it by adjusting the cam pulley on the pump end clockwise and it came in to spec and was measuring 35. Great I thought, it’s only going to need a touch more and he’ll get it to the mythical 55.

6 hours later and he just could not get it anywhere near. Sometimes he could get it to 0-15 but mostly it would just read 255 ‘too advanced’

It never came down from 255 to say 100 or 150 when he retarded it only way below 55 at 0-15.

He adjusted it a couple of times and it was then reading an alternating reading of 255 and then 38. It said 255 was too advanced still, but 38 was too retarded.

He then tried adjusting the tensioners as I found another post to say that you could adjust the timing those.

We ended up back where we started pretty much and he called it a day.

Im absolutely at a loss now - I really need someone who properly knows what affects what who can start from scratch with what to set up to get it right. The guy who came today checked and was 100% happy the cam belt timing is spot on.

Again I will ask, although maybe a wider area now but can ANYONE please recommend a decent tech who can set this up and get it starting properly please?

I’m located in Bedford but could travel although the closer the better obviously.

Someone must still know how to sort these things surely???? And this forum must be the place that knows where they are!!! :)
 

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The 255 reading is sometimes just thrown up as it's out of range as a default reading. Dont see why the guy couldn't get to the timing spec if he managed to adjust it, do you have any fault codes stored? Wondering if theres a pump advance fault

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Discussion Starter #9
Thanks for the heads up on the 255 reading.

I don’t know why he couldn’t sort it, he came close and that’s the problem, and he wasn’t 100% sure though himself - I keep getting people not quite experienced with these particular engines enough recommended to me, and although I’ve rung around plenty of VAG specialist indies none of them can help either.

No fault codes stored, all clear on that front cheers.
 

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...can ANYONE please recommend a decent tech who can set this up and get it starting properly please?

I’m located in Bedford but could travel although the closer the better obviously.
You’re in luck and only 35 minutes away.

DL Auto’s - VW Specialist in Graveley, Hertfordshire.
Doug is our VW Transporter guru who runs a T4 & T5.
One of a rare breed of mechanics that actually know their T2’s/ 4’s/ 5’s & T6’s.
Don’t waste anymore time, give him a call?
 

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Discussion Starter #11
Thank you ever so much Vanpyre!! 🙏🏼🙏🏼🙏🏼
Will give him a bell on Monday, Doug sounds exactly like the man for the job.

Will update once he’s looked at it

Have a good weekend all
 

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Hi
You must be very lucky to set the pump exactly to the middle line on the tdi graph
It is good if the dot fits between the top and bottom
If the timing jumps too much up and down the problem is in the pump

you can also check the cables leading from the pump and sockets to the sensor on the engine block sometimes the cables are damaged in plastic condue

Odoslané z Mi 9 Lite pomocou Tapatalku
 

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Discussion Starter #13
Hi all - just wanted to say thanks to those who have helped. Van went in to Inde-Tech in MK who set it up on a DTI gauge so now starts on the button every time as it used to 👍🏻
 
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