W123 - 200T 1984 starting/idle problem

[scotty]

Hello again,
still not sorted out my problem. From cold, car starts but revs fall away and engine stalls. Car keeps stalling almost until running temp is reached then runs/starts fine. Whole carb was swapped over yesterday and choke & mixtures set correctly etc. by garage but still stalls from cold. Can't be fuel and I've checked everything else(I think!)....so does anyone have any ideas?
Could it be a more serious problem involving valves (I also run on lpg & no difference)?
Please help!
Thanks
Paul - W123-200T-1984(B)

 

[32053]

123 idling problem

My car had a similar problem if I blipped the throttle. I think you may have a problem with the cold start mechanism. Get round this by starting the car with one prod on the throttle then release, then let the engine heat up for a few minutes before moving off, without revving up.
Before next winter, find a decent Merc specialist in your area and let them do their magic.

 

[scotty]

Hello there
I've tried doing that but the revs don't hold on for long enough. The engine just stalls and I have to throttle down to keep the engine running until warmed up a bit.
If I try and pull away before the engine is warm...there is no power at all and I have to give it loads of throttle and practically flood the engine to get going - often resuling in stalling. Economy has therefore suffered big time! 15mpg now(was 20).
I'm wondering if there is a leak in a manifold somewhere? which closes when warmed up a bit?
The Merc specialist have tried most things and reckon the intake manifold pre-heater wouldn't cause this sort of problem if it isn't working. Is this true?
At least I know its not the Carb!
Any other ideas would be welcome.
Thanks
Paul - 200T 123