Thanks Guys,

I'm replacing the plugs & wires today. I'm sure the fuel is a bit old, but I'd be surprised if it only created a problem after the car was warm...

Interesting idea about the temp switchover valve. I know the one you are refering to, it's on top of the thermostat housing. It's interesting that you mention it, because I replaced the coolant temp sensor for the gauge in the dash yesterday, as it was dead.

Does anyone have the specs for the OHM readings over the switch over valve by the distributor.

Thanks!

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Currently:
1972 350SL Euro 4spd
1973 BMW R75/5
1981 BMW R80GS
1995 FZJ80 with OM606 Conversion In Progress