I removed the check valve near the water separator with some difficulty. Still
bubbles/foam showed up in the fuel line to the pump.
I could not blow through the check valve. It would pull about 3 inches of vacuum when I sucked air through it with my vacuum pump.
I thought it should not have any resistance at all?
??
I hesitated to change the fuel filter because I had replaced it last July. Anyway, the bubbles totally cleared up with a fuel filter change!!!
Also, I can feel more power going up grades on the freeway. I cut the top off of the filter. It didn't look too dirty to me. It's a Hengst. I never suspected the filter because of my history of changing the filter ever since I have owned the car. Are the Hengst filter good quality??
I thought there might be some hard starting issues without the check valve, but not so far.
Thanks for the tips and the forum support!!