Hello,

S-Max 2009 2.0L TDCI (Duratec)

Hoping I can steal some words of wisdom, bar the.... take it to a garage, because that is last step....

Driving home one day, a little low on fuel, the idle became very rough and when trying to rev, it would stifle the revs and then eventually cut out. Thinking it was fuel, I got 5 litres delivered to me, topped it up and tried to restart. No avail.... Had the Yellow man come out to me, and after 30 minutes, still couldn't get it started. So I was towed home.

They thought it was the fuel injector pump, and to be fair, I was convinced of this too. So I got a second-hand one, swapped it out and bled it through manually. I have ForScan and there is no MIL.

I have changed a fuel line as well as changing the fuel filter.

However, I can see from the common rail pressure sensor that fuel is building up, and it does start roughly and then cuts out. During this, there is unburnt diesel being pumped out of the exhaust.

I am now wondering/dreading that the timing belt has jumped a tooth, hence the rough idle and stalling. 

Any other ideas before I delve in to the pains of timing belt woes?

 

Simon

If definitely no codes then all I can say is that it did originally appear and still may be fuel?

Sorry if grandmothers and eggs!

Check for bubbles in the fuel line - air leak.

Check what Forscan says is the demand fuel rail pressure v the actual.

Is it unburnt fuel/smoke from partial combustion from all cylinders

Was there any glitter in the fuel filter (implying pump breaking up - this would still be around the system so would destroy any new pump and/or injectors?)

There is a specific issue with timing fuel pumps, this is for Mk 5 (Alan has lots of good advice including timing):

 

Good Luck, keep checking for codes and look for parameters that govern running and try to see what is sensible. Report back but try not to fire the parts cannon, diagnosis is the key?

Also there is a tremendous amount of diagnosis that can (should?) be done before anything is replaced. Suggest you find someone who knows what they are doing such as looking for correlation between CKP and CMP which would rule out timing belt issue?

This video may give some insight into what is possible (after you've found a skilled tech!: