Hi

Having a problem on the e220. After driving the car up to operating temp and turning the car off and leaving for 10-15 mins, the car must be cranked for about 5-6 secs before it fires up again?? Initial start in morning when cold is good no dramas starts within 1-2 secs of key turn. When warm, the car does start eventually (never fails to) but takes a longer period of time to fire up after a run. Starts great after cooled down again though??

any ideas to the cause of this problem?
cheers all

 

hi plutoe. tnx for your concern. I Pm'd you the chassis no

 

tnx plutoe. could u please explain the first part of this response a little? tnx

 

just looking some service receipts here and its got here "good 2nd hand variable timing sensor" installed in 2012?? could this be the culprit?

whats the best way to replace the sensor? cheers

 

ok so i got underneath to have a look at this CAS
i presume this is the little sucker?



i could reach it from underneath and took a pic with the iphone. just not sure whether id have enough room to take it out without removing the starter bolts??

i noticed also that the aftermarket sensors are a little different to this original sensor, in that the connector sits vertically as opposed to my sensor's horizontal connector position?

tnx

 

sry for being blunt! mine appears to be the older type of sensor with leads by the looks of it?

 

does this look out of the regular guys?



loose connection?

ps: i had a fiddle around and this is a worn round piece of rubber which spins freely. presumably has peeled off the wiring due to old age and heat ^^

 

was waiting till you orbited around ... haha . thank you for clarification on the part number Plutoe! i was tossing between 8 or 3 on the sensor housing. the 2nd hand one was installed when the vehicle was not in my possession. i presume because the garage couldnt source the equivalent of Bosch so they wanted to avoid unknown OEM perhaps...

 

where abouts does the other end of the sensor lead go? trying to see if i can find where it goes to but hard to see. maybe the starter needs to be moved out of the way?

 

tnx Plutoe

 

replaced crank sensor but problem still exists it seems ? does the cam sensor have to be replaced also? Could it be my wiring harness causing the premature starting?

 

Wiring harness do give issues. Crank sensors very seldom. For your issue. Check fuel pressure after you switch off. Make sure it has holding pressure and that it does not fall back to zero bar. Good luck

 

thanks for your response Russell. i dont think i have the DIY tools to check the fuel pressure. how would u suggest i go about it? tnx

 

Only way is to buy a gauge. Or find a indy that can check. Without holding pressure it will battle to start when hot.

 

hi russell. would i have to test the pressure at various points to determine where exactly the loss could be? is it not the external fuel pump?

 

You only need to test the pressure at the test point on the injector rail. Connect gauge. Run the car. Switch off car and check if a holding pressure is maintained.

 

oh ok. just one thing russell. i spoke to a friend who works at MB and they said they have a feeling it might be throttle body related. he didnt diagnose the vehicle just when i mentioned chassis, year, and symptoms he said that. could it be the case?

 

Throttle bodies and wiring looms do give trouble yes. Also airmass sensors. But according to your description I would check fuel holding pressure first simple easy test and costs u nothing. You also say it starts perfect when cold. Runs and idles fine? A throttle body would cause very low idling and would be especially problematic when with cold start. Fuel pressure is your first test. If that's OK. We will continue further.

 

yes thats correct rus. starts in 1-2 turns when cold. love it. more turns needed when hot or after 15-20 mins of resting. if started within about 5-10 mins of vehicle resting it will start within 2-3 turns. strange really ?

 

I am still waiting for this post to get going again .This is just like my 2.6 m103 .Easy to start ,but when hot , it will not start right away. Fuel pressure regulator has a smell of fuel in the pipe. Accumulator changer ,fuel filter changed ovp relay changed .As was the fuel injection relay.

 

that is interesting optimusprime. i guess time will tell

 

w124 The car runs great .Only jobs keep on popping up from time to time. And to be expected for the age of it. Even picked up an ezl , thinking it to might have been the culprit. And it was not. With the price of these ezls, it wont eat anything in my garage. Time to buy an EZL now if you dont have a spare .I bet ,you have seen the price of them .

 

It's not strange at all that when hot it will start fine after 5min but not after 15min.
And RE the 2.6 m103 it has a completely different injection system you cannot compare HFM and K jet hard starting issues. They function totally different!

 

noted. tnx russell
optimusprime: sorry i do not know of this?! should i be worried? hope its not another headache lol ._.

 

M111 engine does not have EZL. So no worries there.