Hi All

My 124 with 102 engine just underwent a head gasket job. Now I find that it doesn't start so readily in the mornings. I believe that my cold start valve is triggered by the coolant temp sensor (its new, single pin type). I read that the fuel pump relay triggers the valve under 35 C. Is it just between the valve and the relay or is the ECU involved? I checked the valve with a multimeter and it checks out OK. I cracked the fuel line in and there was fuel.

Can someone help me understand how this works?

Regards

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1992 124 E200 (Euro)