I too am having the same problem with my '88 245 w/194K, but my no-start is intermittent NOT constance.
My FPR is within spec. as is the ECT sensor.
One thing I did find and fix was the TPS. The throttle switch was at the edge of proper adjustment, sometimes it would make contact at the idle stop, sometime not. Thought that was the fix but a few days later, no start, flooded plugs again.
Now I just discovered that my pre-pump is not working. Vapor lock ??
New pump is on the way. I will report back if it fixes the no-start/ lousy fuel mileage condition.
roll on
Peter in PA
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