New to Forum-Have Problem I would like Relay

Hi, I am the proud owner of a 1984 300GD (which started life as a 240GD and over the years and owners has become a Turbo 300GD) and being a diesel, it works. But I also own a 1986 280GE, this truck is super clean and has a problem which no one has been able to point me in the right direction. The problem: After you have driven 15 to 20 miles, depending how hot or cold it is outside, when you come to a stop the truck starts to shutter as if it wants to stall. Now what we have done so far includes tuning the engine, changing all fluids and filters plus general looking over. The engine runs in neutral as smooth as you would like at 850rpms (factory specs) and the transmission shifts as smooth as any I have driven but once it heats up and you are set at an idle of 850 you will stall so we have upped to idle to 1500rpms to compansate. Now I have chacked will serveral MBZ mechanics locally and they have all said "I have never seen a torque converter go bad", the torque converter being the last thing to think about. But I would think that if it were bad I would feel something funny as I drive the truck. Please give me your two cents, my head has lumps from banging it against the wall. Thanks Chris.

[goldenbear]

Welcome to MercedesShop. I don't have the answer to your question, but since it's a more general question, you may get a better response if you also post it to the Tech Help forum. There's some super knowledgeable folks over there that wouldn't frequent here too often. Good luck.

[Gilly]

I am assuming here, (never a good thing to do) that the problem is with the 280 gasser, not the 300 Diesel (not entirely clear on your post, but I can be a bit dense at times admittedly, so don't feel bad).
My 2 cents, assuming it's the gasser, is it sounds alot like a secondary ignition breakdown, the proper course to diagnose this is get it on a scope when it's acting up. Thoughts would include improper sparkplugs, bad plug wires, bad cap or rotor, or coil.
Guys over on the vintage forum may have more ideas for you since this engine (the M110) is getting pretty old and alot of the guys over on Vintage discuss them quite a bit. Since it's grey-market, you may want to get the engine number and let them know what type of fuel system it has, I assume it's injected, make K-Jet, but suppose it could have carbs, that'd make a big difference.
Oh if it's injected, it could also be the warm-up compensator too I suppose, just another thought.
Gilly

[jfreezn]

I would check the cold start valve for leakage which is not a factor when cold but makes your engine too rich when warm. You can remove it, reconnect the fuel line and run the engine for a simple check. The part should be hot and normalized, so you can check it in the same condition is is likely to be failing.

Be sure to blank off the opening in the intake manifold.

Jim in Phoenix