cossy still dont want to start

[190ian]

I tryed starting it with the cold start connected and disconected and no different.
I will check the valve clearances be for i try again.

 

[190ian]

I tryed a tow start this morning.
It was fireing but no start, got back home petrol on the floor and down the road,opened the bonnet ,petrol every where.
The spark plug holes full up with petrol covering the plugs and in the leads the lot, all the pipes were on tight and no sign of where it came from
I will post the pictures up later.

 

[Dieselman]

I'll come down with a match if you don't sort this soon...

Just pull the fuel pump relay or fuse then try the petrol dribble method.

It sounds like the metering head is leaking and delivering at full rate continuously.

 

[190ian]

There has been a few times i have wanted to do that myself i will give that a try once i have cleaned it up and dryed out the spark plugs.

 

[Ultymate]

From what I can see of that photo your valve timing is out on one or both of your camshafts, if you look at the lobes of the 4 valves for No1 cylinder ie the front pot and imagine them rotating there is no way at anytime that all 4 valves will be closed at the same time ie right on the heel of the cams which is what they need to be at T.D.C. on the firing stroke. From what I see you may well have bent the valves by trying to start it with the timing the far out, fingers crossed methinks

 

[Dieselman]

From what I can see of that photo your valve timing is out on one or both of your camshafts, if you look at the lobes of the 4 valves for No1 cylinder ie the front pot and imagine them rotating there is no way at anytime that all 4 valves will be closed at the same time

Yes they will at any time the tappets are running on the rounded heels. They will be closed for most of the engine rotation duration.

That looks Ok to me and it has already been established that the engine has compression.

 

[190ian]

Sorry the pictures are not very clear.

The point is on the OT mark (marked with tipex) and
the holes line up on the cams.

Just had a thought could one of the reasons for the amount of fuel be the fuel pressure regulater being faulty.

 

[Will]

I'd definately check the timing.

Ian, it doesn't look right in that photo, not saying that it's wrong but I would check it.

Before you do anything more with this car, go right back to basics and check everything again.

Align the two camshaft sprockets so that the small holes are facing opposite each other and check the timing against the crankshaft sprocket.

See this thread for a couple of pictures:

http://www.mbclub.co.uk/forums/showthread.php?t=40847

Once you are absolutely certain that the timing is correct, check all of the valve clearances. You can do this easily yourself, all you need is a set of feeler gauges. Do you have the specs? - if not I'll dig them out.

Once you are certain that the valve clearances are good, try as Dieselman/Grober have suggested - pull the fuel pump relay out and try turning it over. Does the oil pressure come up ok? If so, introduce a small quantity of fuel through the inlet or some easy start to see if it fires. If you can get it running for a short while then try and check the compression of all four cylinders. Should be around 175psi IIRC - if they are vastly different or low then you may have a problem.

Once you certain that the basic engine is sound, then you can move your diagnosis more towards the other items - fuel distributor etc.

Looking at those photos that is an incredible amount of fuel that you've got in the bores, lucky it didn't hydraulically 'lock'?

Will

 

[Will]

Right, Ian - I was referring to the other pictures in my last post. The timing looks ok in those photos but if you've got some clearer pics it would be easier to say for certain.

Will

 

[190ian]

I have checked all the timing and everthing is right(its the same as in your pictures Will)
I have been given the number of a Person who has only worked with mercedes for years.
An expert im told,and i will see if he can check things over for me.(im going to ring tonight).

 

[grober]

Did you try it with the electrohydraulic pressure actuator DISCONNECTED?

 

[DieInterim]

Still not starting?

Hey I read to the point of massive fueling.

I am assuming that this is fitted with BOSCH KE-Jetronic injection, compression verified, valve cleances re-checked...

From what I have been reading, you should pull all injectors, bend back your lines carefully, and place containers beneath the injectors. Turn key on, not starting, fuel system should pressurize and fuel should not be spraying from injectors. Place a pen in the air plate and turn the key on, fuel should now spray.

I forgot to mention to disconnect the ECU temp sender, as it could signal to trigger the cold start injector. With it disconnected no fuel should spray from it when you turn the key to the "on" position. Also disconnect the EHA valve during these test.

From what I have read I suspect fuel will spray with key "on." From there you can isolate which component it to blame with additional testing.

Regards,
BlaKe

 

[gl boy]

bit of an oldie but have you got it going now??????????????????