newbie needs quick help

[bigredone]

I was driving on the M6 yesterday when my 1998 c240 just lost power. I kept my foot planted because I was in the fast lane but the power loss continued. As I moved towards the hard shoulder it felt like the rear wheels locked up so I knocked it into neutral (auto box) and limped onto the shoulder.

On the shoulder the engine died straight away.

Tried to restart, turned over and didn't fire.

left it 5 minutes and back to normal.

drove 20 miles before it did it again, just as I overtook a police car!

Does anyone have any ideas what went wrong. It has had a new MAF sensor less than 2 months ago.

It's also in for a service tomorrow and I could do with a heads up before I get ripped off with the trial and error thing.

Cheers

Matt

 

[wiltsandy]

Crankshaft Position Sensor gone duff? Symptoms sound the same as happened on my Cherokee.

The CPS usually fails when it's hot but let it cool down and the car will run again until the heat builds up and then it cuts out again.

 

[Hertfordshire Merx]

C240 V6 do suffer from crankshaft position sensors (L5's) going down. Ideally it needs to be diagnosed with a star machine to be accurate, but I would think thats your problem due to the engine restarting again and performing a few minutes after your episode.....

 

[wireman]

All motorway lanes are FAST lanes, even the 56 MPH a truck can do is fast, I believe what you meant is correctly refered to as the third or overtaking lane. I call it the Mercedes Benz lane.

I concur that your crank sensor is a likely candidtate, unfortunatly intermittent faults almost always include trail and error to diagnose and fix them.

 

[turbopete]

I call it the Mercedes Benz lane.

so why do the numpties in BMW's etc keep using it then??!!

 

[wireman]

Coz they are very naughty.

Its the Audis that most annoy me.

 

[ALFIEBEARD]

so why do the numpties in BMW's etc keep using it then??!!

Coz they are numpties Pete
Alfie B

 

[bigredone]

turned out to be a cheap fule pump, one of the sensors in it wouldn't talk to the ECU properly