E300td cutting out.

[BlackC55]

I have a E300td that I am about to look at for a friend of my father. He says it cuts out while on the motorway at slow speeds at anytime and any temp.

I think its fuel related but maybe someone with more experience with these can shed some light on it.

Thanks in advance

PS I am poping down the pub now:bannana: so may not be able to answer any questions till the AM.

 

[Dieselman]

Crank position sensor, ignition switch or air leak come to mind. The air leak its the most common as the ECU should use alternate sources to check rotation if necessary.

 

[BlackC55]

CKP is the obvious but as you said the ecu will use alternate sources for tdc no.1.

I willl check for an air leak. Are there any common places.

 

[Dieselman]

The filter head clear pipes.

I'm not sure the ECU can substitute for the CKP, just the rev sensor in the pump.

 

[BlackC55]

I was thinking of a vacuum leak not a "air leak". Silly me. I have replaced a few of those fuel pipes before along withthe non-return valve. Thanks for your help

 

[BlackC55]

There is no air in the syatem at all and always starts well. I have just been to look at the car this morning.

When the problem happens the dash lights flicker too. I think it might be related to ther ignition switch????

I will do a short test on it first to see what fault codes are stored.

 

[Dieselman]

Probably worth checking the main connections and earths as well.

 

[Benzowner]

Had a similar problem on another car, and it proved to be the engine earth strap was almost not existent. Not sure if MB's have those, but maybe worth a look