I got my sons working same issue there is a thermal resistor in the actuator motors that gets weak or opens up . I put aluminum foil over the little flat resistor and works just fine. I think it’s there in case switch hangs up. There are some videos on this on the web.
I am stumped this is what I have done so far. I had high pressure issue 90 psi and went past a 100 wot and found my spring in the fpr hung up and bent. Ordered kit from diesel o rings rebuilt the entire fpr and fuel bowl. had an issue with the brass piece under the fpr and snap ring finally got...