me again.

[david55amg]

Distributer advance weights sticking? check the advance with rpm with a timing light on the front crank pulley timing marks.

doesn't look like it has any advance weights in it. The cap just seems to bolt on to the cylinder head. However, I will have a look and let you know.

 

[david55amg]

**UPDATE**

Right, I am pretty certain its fuel related. I removed a fuel pie to no. 1 injector and spun her over, all but no fuel coming out when it wouldn't start. nice healthy spark at king lead AND plug lead end when turning over at all times. do you think it could be running on the enrichment (cold start) circuit? I don't know too much about fuel injection systems (prefer a good old set of twin 40 dellortos ) can any of you kind folk help here.

LATEST
My bl***y indicators and hazards aren't working now!!!!! Think I'll give up now

 

[Dieselman]

I doubt it would run soley on the enrichment circuit but you never know.
Can you hear the fuel pump prime the system when you turn on the ignition?

Before I go too far, what Fi system does it have, is it mechanical or electrical?

Just noticed the indicators bit.
This could be a problem in the fuse box causing loss of power to some relays.

 

[david55amg]

I doubt it would run soley on the enrichment circuit but you never know.
Can you hear the fuel pump prime the system when you turn on the ignition?

Before I go too far, what Fi system does it have, is it mechanical or electrical?

Just noticed the indicators bit.
This could be a problem in the fuse box causing loss of power to some relays.

Thanks for your reply.

Yes, the fuel pump is doing all the right things. I cracked the main fuel pipe in the engine bay and turned the ignition on and a lovely fountain of fuel came out and sprayed a van next to me!! I think it's a Bosch k-jetronic system, it's a bit of both I think. The fuse box was very wet inside so i will look into that later

 

[Dieselman]

Are the injectors fed hydraulically from a fuel distributor of are they elctronically operated?

 

[Ian B Walker]

They will be from a distributor Will

 

[Dieselman]

So the only way it can't be spraying is if either the distributor needle is sticking closed, the pressure regulator is stuck closed or the fuel pump isn't delivering enough fuel.

Check the fuel pressure with a low pressure gauge and check the fuel pump connections including the earth.

A thought just came to me....The car has been standing and I wonder if the tank pickup might be blocked with silt or the filter is blocked.

 

[david55amg]

So the only way it can't be spraying is if either the distributor needle is sticking closed, the pressure regulator is stuck closed or the fuel pump isn't delivering enough fuel.

Check the fuel pressure with a low pressure gauge and check the fuel pump connections including the earth.

A thought just came to me....The car has been standing and I wonder if the tank pickup might be blocked with silt or the filter is blocked.

Just by way of cracking the main fuel pipe, I can say there is plenty of fuel rushing through but distributor needle sounds logical seeing as it has been stood for over a year. Is the regulator bolted to inlet manifold on the return pipe? Can you get to the needle at all or is it (I would imagine) a strip down of the fuel distributor

Thanks for all your ideas, it's good to get a different look on it sometimes
:bannana: :bannana: :bannana: :bannana: :bannana: :bannana: :bannana:

 

[Dieselman]

Just by way of cracking the main fuel pipe, I can say there is plenty of fuel rushing through but distributor needle sounds logical seeing as it has been stood for over a year. Is the regulator bolted to inlet manifold on the return pipe? Can you get to the needle at all or is it (I would imagine) a strip down of the fuel distributor

Thanks for all your ideas, it's good to get a different look on it sometimes
:bannana: :bannana: :bannana: :bannana: :bannana: :bannana: :bannana:

The needle is the bit the airflow diaphragm valve works on although I'm sure you know that. I think you can strip it down to get to it.

Your idea of it running only on the cold start injector may be correct...

Sometimes a tap on the top of the fuel distributor can free them off but hold the diaphragm fully open and only gentle taps, we don't want you denting the distributor. Try a plastic or wooden mallet for this.
Get some injector cleaner through it as well once it's running to ungum it.

 

[nick mercedes]

Thanks for your reply.

Yes, the fuel pump is doing all the right things. I cracked the main fuel pipe in the engine bay and turned the ignition on and a lovely fountain of fuel came out and sprayed a van next to me!! I think it's a Bosch k-jetronic system, it's a bit of both I think. The fuse box was very wet inside so i will look into that later

Dizzy caps and fuel pump relays are about all that ever stop M103s....

 

[230K]

Hi

To rule out the ignition system why not pour a little petrol into the inlet manifold (very small amount about an egg cup full, remove the top of the air filter and pour) if she starts then its a fuel problem if she doesnt then its ignition.

My money is still on a damp dizzy cap condensation on the underside.

230K

 

[david55amg]

Dizzy caps and fuel pump relays are about all that ever stop M103s....

thanks for that, I'll look at those on thursday. cheers.


Also thanks to 230k for that pearl of wisdom, never thought of that!! I'll try that as well. ta v. much.

 

[david55amg]

Hi

To rule out the ignition system why not pour a little petrol into the inlet manifold (very small amount about an egg cup full, remove the top of the air filter and pour) if she starts then its a fuel problem if she doesnt then its ignition.

My money is still on a damp dizzy cap condensation on the underside.

230K

hi, just thought I'd keep you lot up to date. I poured some fuel into the open injection flap while turning her over. nothing then it backfired and damn nearly took my eyebrows off!!! I am now giving up and letting the experts get it done (probably costing more than car is worth but whatever. Thanks for all your input, I will let you know what the problem was

 

[Dieselman]

Sounds either like the timing is advancing or the coil has low output voltage.

 

[david55amg]

I'm busy till way after easter so I dont have a choice but to let my mechanic have a look. No matter! Cheers dieselman, I will let you know how it goes.

 

[230K]

Hi

It is obviously spark that is the problem, i would still take that distributor cap off and dry the inside. While you are there have a look at the rotor arm for cracks.

230K

 

[david55amg]

RIGHT!!!

I am at the end of my wits.......

Thought I would give it one more try. I have removed the air flow meter and it seems ok. checked the spark and seems good and strong.

However, the spark plugs were wet through with fuel so I cleaned and gapped them. Still no luck. Plugs wet again

I spun the engine with the plugs out and there was a torrent of neat fuel coming out (dont know why it hasn't hydraulic'd to death)

If you lot are as completely clueless as I am, I might break it up as there are plenty of good parts on it, pity really!!

I am not touching it this bank holiday as I am stressed so going to the local for a beer, that'll cheer me up

 

[Dieselman]

Assuming this is EFI, the way the injection system works is that the injectors have a 12v feed all the time and are then grounded by the ECU to operate the injectors.
Maybe the negative wire has shorted causing the injectors to run all the time.

 

[david55amg]

Assuming this is EFI, the way the injection system works is that the injectors have a 12v feed all the time and are then grounded by the ECU to operate the injectors.
Maybe the negative wire has shorted causing the injectors to run all the time.

thanks for the reply but no. It has the mechanical injectors, they seem to spray all the time and the engine just takes whatever it needs. Injection system is the bosch ke jetronic

 

[david55amg]

Done It!!!

At last. I've found time to sort the old girl out. in the end, it was the fuel distributor. I found it was spraying fully all the time so flooding the engine (took £15 of fuel to suss this out!!) went to the local scrappy and sourced a distributor from a 300e 4matic saloon in red. to be honest, the car didn't look too bad. Such a shame it has been scrapped, it looked like it might have been a good project. Anyway, started first time and going like a good un :bannana: :bannana: thanks for everyone's help, I nearly scrapped it but you kept me going. I'm going to have a few beers tonight to celebrate