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I am not sure how bad fuel could cause foaming in and of itself. That would more likely be caused by aeration of the fuel somehow:
1. Leak in fuel line or pickup tube, as previously mentioned
2. Cavitation related to one of the pumps - maybe an impeller is messed up.
I am not sure how bad fuel could cause foaming in and of itself. That would more likely be caused by aeration of the fuel somehow:
1. Leak in fuel line or pickup tube, as previously mentioned
2. Cavitation related to one of the pumps - maybe an impeller is messed up.
I would look to make sure the volume control valve or the pressure control valve are working as designed next. Those could cause cavitation as well. Ford guided or pinpoint testing usually gets to the bottom of it. Timing just sucks......
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