Thanks Carl for chiming in. In all occasions when the pressure dropped, the tank was at /2 mark, in fact it happened after we filled the tank. I'm very certain that the pump was submerged in fuel the whole time. The pumps are new. First one had 600 miles. The 2nd one has 400 miles.
I'm going to switch the pump over to a mid 90s Chevy pick up pump. That way I can get replacement at local part store. In MS, I walked into the local part store and asked for a walbro or an aeromotive pump, and they had no idea what I was talking about.
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