Appreciate your patience. This is an old intermittent problem never resolved. My 1990 240 right now won't start. That's good as this problem has been longstanding, intermittent, and only manifests itself rarely. It was running earlier today and when I went out to start it tonight, it would only crank. I broke the fuel line and saw no fuel. When I turn the key on I can hear the fuel pump relay click but the main fuel pump does not come on (I can usually hear it run for a few seconds as it pressurizes the line). It is a new pump and relay so not worried there. Somewhere a signal is not getting to the pump to allow it to start and that condition is intermittent. The fuel supply has also cut off while driving and I believe it's the same problem. I need to better understand the fuel circuit wiring to understand where a break or interruption might be. I'm not sure where to find a wiring diagram but will google it. Other than a break in a wire affected by temperature or vibration, what else might be in that circuit that would deny the fuel to run? Could it be in the ignition switch? Note with the key on I pulled the plug to the amm and checked voltage. I only found voltage on the orange wire (which was the last wire closest to the radiator). Anyway I know I still haven't run down other old issues here but haven't had the time. But still appreciate any current thoughts. Best Regards. Mark