I have an 87 351W that does not start, OBD1 shows code 95 secondary fuel circuit. I have zero pressure at the schrader valve on the fuel rail. The fuel relay is good as is the inertia switch. I can hear the high pressure pump run with the key turned on. So the question is do I have a bad pump in the tank that feeds the HP pump? I also have zero volts at the HP pump with just the KO, am I chasing an electrical issue?


BTW I got another Bronco, twin to this one. Pictures to follow. [img alt=""]data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7[/img]



Twin to the one I'm working on, won't run just like big brother.

Back to serious. Someone tell me what's this circled hole for, It's threaded and I found a small piece of vacuum hole in it open on both ends.

 

Looks like just an extra threaded hole in the head yours does not use
Yes, the in tank pump feeds the frame rail pump through the reservoir filter assembly on the frame at the rear
Those early ones had a filter in the reservoir cup
Verify yours has no filter in front of the frame pump
If there is no FG-800 A fuel filter near the frame pump, you can unscrew the reservoir cup and inspect / replace the filter
Get a filter and an o-ring before removing that reservoir (they are bitchy to get the O-ring to seal in the reservoir cup) (grease helps to keep the o-ring in the groove as you screw it back on)
You can check the fuel pressure at that reservoir, the low-pressure in tank pumps put out around 13 psi

 

So I have tracked the fuel pressure lose to the fuel pressure regulator, I have pressure that far. I pulled the fuel rail to get to the regulator and broke the hard plastic line runs under the intake to the rt side fuel rail?? I'll know more when I get intake off. As for the hole I'll get a better look, I know it's about 11/4 inch deep.