Hello! Replaced the factory block mounted lift pump and I've been running a Raptor100 for 10 years, 20,687 miles on the pump, 93,540 total miles on truck, don't drive it a lot. 10 years holding 17 psi at idle, with normal minimal pressure decline under load until recently. New rebuilt VP-44 3 months ago, fuel filter change 2 weeks ago. Now pressure varies at start-up depending on the day, and stays at that pressure the remainder of the day, sometimes normal 17 psi, lately often 10-12 psi at idle which is a significant loss. I don't want to just dial up the pressure on the pump, that won't solve the issue. Called Pureflow today and they said probably ECM is bad. Funny, no codes pulled for that, no other electric issues going on, are they blowing me off or what could this new intermittent pressure loss be attributed to? I have searched for answers but non fit my scenario. Many thanks in advance for suggestions.