1988 w124 230E car wont start

[Fergal1975]

I have a w124 230 E that I'm in the process of restoring. Was starting and running . Took front wings off yesterday removed front lights . Now wont start. Have feul at throttle and have spark but will start any ideas thanks in advance

 

[DREAMER NO2]

Check out the fuses in the fuse box .. Removing the front wings you might have catched a wire and blown a fuse to othe items .

 

[Fergal1975]

Tried the fuses all seem fine checked them with tester feul is pumping up to feul distributor and have a spark its as if feul has been cut off

 

[DREAMER NO2]

Have you removed an hard line pipe to one of the injectors to see if you have fuel in the pipe .

 

[Fergal1975]

Yeah removed one of the pipes on top of the feul distributor no feul coming out

 

[DREAMER NO2]

What about the fuel return ,,have you checked that ?

 

[Fergal1975]

Haven't checked how would I go about checking that or how does it affect it ?

 

[DREAMER NO2]

First remove the hard line to cold start injector , and then spin the engine over and catch the fuel in a jar ,,thats if you get any come out .
The fuel return to the tank is the pipe that comes from the front of the fuel regulator on top of the engine ..this is [ picture ] from a w124 it is just like yours see the marked in red this small pipe is nylon ,so take a look at it and see if fuel is coming out of it ,and if there is its shot. . Do the same to the return pipe remove the pipe from the front of regulator and see if fuel is returning to the tank when car is turned over .
If this car has been standing, then most likely that the valve inside the metering head is gummed up it stops the flow of fuel going in to f/distributor .

 

[DREAMER NO2]

Regulator picture -

 

[Fergal1975]

Thanks I'm in work soI'll try that when I get home this eve . If I get a chance see what happens . Thanks again .

 

[Fergal1975]

I tried as you said all have feul coming then took all four pipe feeds to injectors off top of feul distributor not a drop of feul it's a real head scratcher.

 

[DREAMER NO2]

Not realy your fuel presure needs tp be 5bar = 75psi so low pressure wont open the injectors . After all its quicker to do a fuel pressure test .Anything under 5 bar is not good enough .Once the pressure test is done the results will tell you if the pressure is right .You will know then if the problem is the F/D .

 

[Fergal1975]

Where does the feul become pressurised ? Is it the fuel distributor ? And then in turn the pressurised feul opens each injector as it gets hi pressure feul . I'm learning as I go .

 

[DREAMER NO2]

The injection side on our cars is so complicated ...I try and read as much as i can on the injection system . Pressure is built up from the fuel pumps and then it goes to the fuel pressure regulator .

 

[DREAMER NO2]

Fergal i have just sent you a pm = private message .

 

[Fergal1975]

Hi Dreamer . How are you on diesel's I've swapped over 300d engine n box set up feul lines. Engine was smooth in Donner car getting hard to get feul . I know pump needs vacume to cut off . But does it need it to start . I have removed petrol pump and filter. Are the tanks different inside .? Will try swapping over pipes this eve maby I have the return and feed in wrong way. But there is some diesel coming. Any ideas . Thanks in advance

 

[Doug1234]

On the diesel w124 fuel will just run from the tank unhindered if any fuel pipes are disconnected on engine , even injector leak off pipes will let fuel out from tank.
The w124 diesel tank can have the fuel lines swapped over under bonnet ( fuel to engine and return line) as they both exit the tank near each other … fuel out from tank strainer that sits under a plastic bell shaped affair and the return line also feeds back into this and this keeps fuel warm and in a constant loop.

Fuel may not flow readily from the w124 petrol tank ?? , never owned a petrol version so not sure, also the diesel returns to the tank at least nearly a litre a minute of diesel at tick over .
As long as the stop lever on the injection pump is in up position then engine will run.. it will run without vacuum connected but you will need to press lever down to stop engine.
Also if the stop lever has an oil leak then the o ring from fuel filter top bolt is the correct size to use to replace it.

 

[DREAMER NO2]

Fergal did you get my pm ????

 

[Fergal1975]

Fergal did you gert my pm ????

Not sure how do I access it ?

 

[mattkh]

One of the fuel pipes has a gauze type filter inside (like the ones on the washing machine inlet). Have you checked that it is not clogged up.