Hi there,

I have a problem with a 2000 C 220 CDI with 113 K on clock. The problem is as follows.

When you start the car first thing in the morning (cold or warm day) WITHOUT your foot on the throttle the engine will rev up to @ 1000 rpm and stay there for 3 secs then it will drop down and start idling at @ 600 rpm. At these revs the engine is spluttering ( i.e reving up and down slightly) as if it is going to cut out. If you rev tthe engine and take your foot off it will then drop back down to the normal idle speed.

I just left it into the garage there for 2 days and they are still baffled by this.

A number of weeks ago i got the injectors cleaned as they where blowing out carbon on cylinder 3 and 4. The garage that worked on it now put it on the computer and it was saying there was a fault with injector 4. They changed the injector, there are no faults on the computer and the engine is still doing the same thing.

They also changed the air pressure switch but this didnt solve it either. So what is going on?? They have spoken to people round about and no one seems to know what is wrong.

Further to this sometimes when driving the engine will idle at 1100 rpm. I put this down to a sticking throtltle cable and i will grease this up when i get the car back.

Also if you break sharply on a steep hill the car will start to splutter a bit.

We here in Northern ireland are totally confused so now im throwing it out to an international forum!!! Someone out there must have the answer.

Yours in hope

Sean
Belfast.

You might have to bump this one a few times in order to get some of the pros to take a look at it.

I'm not at allfamiliar with your engine so I don't know if I can be of much help. A couple of things come to mind though. Fuel pressure problem maybe? Especially since you notice a stall on rapid deceleration. This also relates to the early morning fluctuation and sputtering. Maybe a sign of the fuel loosing its priming? I know we don't usually suspect fuel pumps on diesel engines but it's a thought.

(Maybe there will be others chime in with ideas.)

__________________
Sam

84 300SD 350K+ miles ( Blue Belle )

is it posible this car has an O2 sensor?

If it were a gas powered car i would guess that would be the problem

__________________
1984 300D / The only Benz I have

Completed weekend projects

1. R/R front crankshaft seal
2. R/R nearly the whole vacuum system
3. Converted to WVO www.greasemachine.com
4. Upgraded to electric power locks
5. Upgraded and rewired stereo/amp/speakers
6. Installed 2.88 differential

None in a diesel.

Almost sounds like a faulty MAF sensor.

Thanks for your replies guys so far.

How do i go about getting one of the mercedes sensais to look at my problem. Dogged persistance????

What exactly is a MAF sensor by the way????

S

Mas Air Flow sensor. It's between the air filter and the turbo inlet. Dirt can get past the filter (From an improperly seated or very clogged filter) and damage it. Also, the oil from an oiled style filter like K&N can coat the sensor and cause it to give false readings.

Thanks for that dude,

That was one of teh first things they looked at or so they tell me!!!! Woudl that not show up on the computer as a fault??

Some guy was saying that on his SAAB there was a specific solenoid for idling. This was faulty and his car did teh exact same thing. Is there such a thing on a C 220 or any MB??

Thanks again

Sean