Hello All,

This is my first posting and I need some advice on how to diagnose 89 300SE not starting. When I start the car it cranks and I can hear the fuel pump in the back whirlling. Sometimes it starts a second then dies. Since the fuel pump runs, does this mean that the Fuel Pump Relay works. I've seen in another forum advicing to bridge the port 87 and 30 of the Fuel pump relay which will continually run the fuel pump. I didn't do this because the pump runs, so I presume the fuel pump relay is good (and fuel pump). Is my novice oppinion correct?

There is a spark in the plug so I assume that eliminates the problem (also confirms when it fires for a second).

I also checked the throttle Microswitch and there is continuity when I press the swith on/off.

I pulled the OVP relay and checked the fuse continuitiy and it checked out OK. How can I be certain that the OVP relay is good or bad? Is there anything else I should be checkin?

I would appreciate any advice. Thank You

Max