BenzWorld Junior Member
Date registered: Apr 2019
Vehicle: 1978 C107 280
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Very looong cranking but runs well?
Have just been trying to work through the fuel system of my 1978 280 SLC (euro) and progress is good. I just recently posted about some vacuum lines on my WUR and that has solved the cold running issues mostly which is very good! I have had a bit of search but nothing seems to come up related to this?
The only problem I have now is that to get the engine started there is a little bit of a procedure.
When you start the engine either hot or cold (slightly better when it has been used in the last few hours) you have one chance when it first turns over for the engine to catch and then it'll start very nicely, if you catch this all is good. If this doesn't work then you will need to crank for around 10 seconds (throttle fully depressed) with no signs of life, after that the engine then splutters a bit and roars into life.
I've never not been able to start this way but I feel that it cannot be good for the starter (also slightly embarrassing, man with the fancy car can't get it started properly).
A bit stumped on this one, so before I go and start randomly replacing fuel system parts would be great to get some opinions!
One other thing, when the engine is idling it will run smoothly but every couple of seconds it sounds like it misses a beat. I am not sure if this is related.
I have already replaced - Fuel pump, fuel accumulator, fuel filter, spark plugs, spark plug wires, new battery and have cleaned all of the injectors.
(Also just went to replace my gear linkage bushing because I thought the shifter was a bit wobbly, turns out I had none in there! The old ones had decayed so much they had completely fallen out. Shifter feels much smoother and more satisfying now!)