1994 C220D injection pump problem.

[Jimi401]

Hi. Brand new to this forum, hope someone can help.
Recently bought a 1994 C220D in lovely condition, low ownership and genuine 89000 miles with service history. Hoped it would last me a few years. It has only one problem it politely refuses to rev above 3000 rpm, which limits the top speed to about 75 mph, and whilst it is reasonably lively accelerating when you first set off it will not rev above 3000 rpm, change gear and it is lively again up to 3000 rpm.

I have had a number of Audi diesels prior to this car and have had the same problem. The problem has always been sorted by changing the air mass meter. Took the car to my local MB technician who after the diagnostic referred me to a local diesel injection specialist. It does have one other symptom, the engine keeps running after you remove the ignition key. This implied to him that something called the ESOS in the pump was faulty and that the remedy was likely to cost in the order of £600.

Can't afford this, I am a charity worker ( I should be driving a Vectra or Mondeo on my wages ) anyone have any ideas? What is an ESOS? Would a replacement pump sourced secondhand fix the problem. I have lived with the problem because it will run all day long as long as I don't want to go over 3000 rpm. Any advise gratefully received.

P.S. Can't remember the fault code from the diagnostic.

 

[television]

Wait till one of the MB guys read the post and welcome to the forum

 

[Jimi401]

Thank you for that, hope someone can help with a solution. I love the car, old as it is, seems so solid. I did ask the diesel expert if I left the problem as it is and live with the poor performance if I was storing up more problems for the future, he said that it would probably run fine for many thousands of miles. Do the forum experts agree?

 

[Jimi401]

Hi. Anyone out there that can help with this problem?

 

[torquewrench]

C220 Injection pump problems

Reading your post I had a similar problem with my 1995 W202 C220 diesel, the problem I had was the cam plate and rollers in the pump, if this is the case, as was mine the only solution is to obtain a new or refurbished pump. below are some of the symptoms, and possible repercussions.
Hope this helps, regards.

fragments of metal from these components is hardened: The fragments can damage or wreck the pump main housing and the VE pump has the ability to send some of the fragments to the injectors causing injector seizures and hole blockages.
Tell tale signs of cam plate/roller problems are:
Engine not stopping on the key,
Power loss,
Blue/white smoke from exhaust,
Poor starting.

 

[Jimi401]

Thanks for that torquewrench. Definately have the first two symptoms and definately don't have the last two. Seems like it is to be very expensive. Anyone any tips on a source for a reasonably priced refurbished pump. Best quote so far has been £700.

 

[Jimi401]

Hi. Seems to be a lack of help on this problem of mine. Does anyone know the make and model number of the injection pump on this model, and are there any substitutes?

 

[torquewrench]

Hi. Seems to be a lack of help on this problem of mine. Does anyone know the make and model number of the injection pump on this model, and are there any substitutes?

You could try a site called Diesel bobs, not sure of the exact web address, you are able to contact them for advice. plus there site is quite comprehensive and you might be able to sort the part no for yourself. Sorry I can not be of more help. I understand what this problem is like to have. It is the last thing you would think for a pump to fail with such low mileage vehicle it might seem a lot of money but you will still have a nice car when it is repaired. Best of luck, regards.