Mercedes C220 EDC light.

[Erwin]

Hi,

I have a Mercedes C220 from 1996 and since 1 week the EDC light sometimes goes on and stays on. At that moment the rpm is limited to 3000. Another thing is the engine runs on for 2-3 seconds after turning the ignition off. I have seen several (O rings, computer reset, injection pump) solutions for this problem but can anybody tell me what the best (and cheapest) steps are to solve this problem ? My dealer wants to replace the fuel injection pump which is quite expensive.

Kind regards,
Erwin

 

[kenn]

Exactly the same problem last year. I am afraid you will need a new fuel injection pump.

 

[jberks]

Has the pump been definatley identified as the cause. You don't want to fork out for a pump, only to find that it doesn't solve the problem. Also you say 'dealer'. It may not make too much difference if the labour component is low, but how much does your local indie charge for this?

 

[Erwin]

Has the pump been definatley identified as the cause. You don't want to fork out for a pump, only to find that it doesn't solve the problem. Also you say 'dealer'. It may not make too much difference if the labour component is low, but how much does your local indie charge for this?

Hi,

The diagnostics showed that the air intake temperature sensor is faulty and the injection pump shut-off valve is faulty.
Is replacing only the valve enough to solve this problem ? They advised me to completely replace the injection pump which is quite expensive (1000 Euro plus labour).

Thanks,
Erwin

 

[jberks]

Who advised it?
Dealers are great at spending your money on components that can be fixed.

Are you dealing with a main dealer or an MB specialist?

 

[Erwin]

Who advised it?
Dealers are great at spending your money on components that can be fixed.

Are you dealing with a main dealer or an MB specialist?

Well, i got several prices from about 2000 Euro at an official MB dealer to 1300 Euro in a not official MB garage. They both want to replace the pump.
I also got a price of 1600 Euro from a Bosch service center for replacing the pump.
And i also got a price of about 200 euro (in another not official MB garage) for replacing ONLY the valve in the pump. He did that already twice (for the C220 Lucas pump) with success.

Kind regards,
Erwin

 

[jberks]

It makes sense, if the valve is the common cause for failure and they can replace only the valve, then why not? Sounds like this is the bit that goes and the rest of the pump is normally fine.

I learned this many years ago with alternators. People buy new ones, whereas I took my car to a workshop, they removed the unit from the car, replaced the regulator and bearings and poped it back on, all for a fraction of the cost of a replacement. As those are the only bits that wear out or fail, I effectively had a brand new unit.

For 200 Euros as against 1300, it sounds like a tempting option. Can they test the rest of the pump before they do it?

 

[Erwin]

It makes sense, if the valve is the common cause for failure and they can replace only the valve, then why not? Sounds like this is the bit that goes and the rest of the pump is normally fine.

I learned this many years ago with alternators. People buy new ones, whereas I took my car to a workshop, they removed the unit from the car, replaced the regulator and bearings and poped it back on, all for a fraction of the cost of a replacement. As those are the only bits that wear out or fail, I effectively had a brand new unit.

For 200 Euros as against 1300, it sounds like a tempting option. Can they test the rest of the pump before they do it?

No, but the diagnostic tests showed only the shut-off valve to be in failure. When the injection pump is leaking, then the pump has to be replaced, but that is not the case for my car.

I decided to go for the 200 Euro solution and hope it will solve my problem.

Kind regards,
Erwin