I have a 1989 300e it was runing fine then it started slowly lost axcelleration power. I checked the spark plugs all 6 where fauled i cleaned them and reinstaled they where all fauled again with in 1 mile of normal dirving. The car ran fine all morning then this happend all of a sudden. the engene was reving fine in n for a while now it is sputtering in neutral too. some how the engene is getting too much fuel, it is blowing out a lot of black smoke a sign of Running to rich
could the coldstart be stuck or EHA
also where is the cold start?

i just heard it might be my temp. sensor in the fuel injection does any one know where that is

 

And what does the spark plugs look like when they are fauled? Are they covered in oil?

 

Hi Leon,

I'm no specialist but car troubles in the past make me think about these components to be the suspect:

- Cold start valve

- Oxygen sensor

- the E.H.A valve (Electro-Hydraulic Actuator)

- fuel pressure regulator

and may be others which I didn't remember yet...

good luck and let us know because it may happen to our car tomorrow...

 

blackwolf all the plugs where fauled with gas. still no luck

 

Sound like your engine is flooding. Way too much gas in the chamber. First thing is to have the fuel pressure regulator checked.

 

Thanks Blackwolf
Do you know if the fuel pressure regulator is located next to the fuel distributer going in to the intake manifold?

 

Unfortunately I haven't been under the hood of a E-class and really don't know exactly where things are at.

 

i finly fixed it it took for ever it was either fuel injection relay i took apart and cleaned or air plunger gap i got lucky lots of fiddlen with stuff!

 

the sensor is on the head ..intake side rear...two post...dont confuse it with the sensor in the middle of the head that one is for the aux fan controller...you might pull out the 02 sensor and see what it looks like ..if its clogged.