" Busy day. Broke down twice driving around due to a fuel line popping off. First time luckily close to the office and second time luckily close to home. So I was able to walk a bit, grab tools/jack, and repair both times. Finally took it apart at home again and realized there was an assembly flaw. The quick connect fitting I was using to mate to the OEM line was not long enough. Found a FRAM F65217 fuel filter at Pep Boys and used that as a joiner. Seems solid now and so far so good. Back in business.
The pump is controlled by the JB4 and turns on at ~8psi. When it kicks on map goes to 20 in the log, and low fuel pressure tilts at 87psi. Based on the last round of testing I'm guessing fuel pressure is around 100psi.
Still slowly building confidence up with the install so didn't venture too far from home tonight but I did grab a few short logs. I can see PWM is maxing out around 60% even when fuel pressure dives. That must just be the maximum. I noticed a bit of inconsistency in how/when it drops. So I'll try to narrow it down so I have a good repeatable test, and then I'll program the JB4 to add a bit of duty cycle to the mass control valve in a situation where fuel pressure has been dropping just to see what happens. "