Hi There

This is worth checking My car VW Passat 2.0 tdi Sport 2008 with 125,000 miles has been having problems for a while and VW couldnt seem to get the problem solved.

What my car would do is start up fine on a frosty morning and then after about a mile it would just cut out and would eventually start by winding it over and over

I took it to VW and they said it was coming up with a fault on No. 4 injector so they suggested I have the injector wiring loom replaced as this is a common fault, i did this and it seemed fine for a couple of weeks and then a frosty morning and it broke down after about a mile same problem, went back to VW and they said it was showing a fault on No. 2 injector and quoted me a large bill to replace the injectors.

I was not happy with their diagnosis as at first they were saying it was No.4 injector and now it was No.2 this car had had the recall early in its life so I thought injectors should be fine and I didnt want them guessing with my money.

I took the car to a small independant garage that I trust and asked them to have a look, They found out that the low pressure fuel pump in the fuel tank was not working they said that this pump primes the fuel to the secondry pump on the engine and then it can pull the fuel through, on a frosty morning the diesel fuel is much heavier and that is why the engine pump could not pull it up without the tank pump working.

Now this made sense as the fuel in the filter bowl was enough to get me a mile down the road and then cut out.

Fuel pump changed and the car is running great I am plesed to say so I would advise you get the tank pump checked

Hope this helps anyone with the same proble

Its a bit late in the day for your problem but anyone same problem it might be the answer

If your's is the CR engine it has two fuel pumps.

The in-tank one that you have replaced & a roller cell type pump between the filter & high pressure pump on the engine.

It is located to the left of the engine when stood in front with the bonnet up.

Just follow the rubber fuel pipe from the filter.

Located on a metal bracket suspended on rubber bungs.

It runs only while the engine is running.

Would have thought you would have low fuel pressure codes though.

Edited by dieselnut on 28/08/2018 at 15:12

Hi all, there were further updates on progress but I forgot to put them on the site so by way of rounding up the saga of the Passat -

As above I had replaced the fuel pump and it ran perfectly - on the drive. I didn't want to drive it in case I pulled more crap out of the tan and damage the new fuel pump so I left it on the drive until the following weekend.

The following weekend I pulled the new fuel pump out of the fuel tank out and cleaned out the tank. Replaced the pump added fresh fuel and it ran perfectly - on the drive.

I took it for a drive, got about ten meters off my drive and the problem re-occurred, no power, barely able to keep it running - I was afraid to take it out of first gear in case it stalled and I could not get it moving again. I drove around the block and put it back on the drive - swearing all the way!

I put the computer on it again and it once again said the engine speed sender had failed! How can that be? Enough was enough, this was clearly beating me into submission and I needed to bite the bullet and hand it to somebody that knew more about the car than I did.

I found a VW technician that was now working for himself. I explained everything that I had gone through and let him free on the car. Within an hour he had found and repaired the broken wire leading from the Engine Speed Sender to the ECU!

Problem solved.