by Rox Crusher » Sun Sep 04, 2016 3:57 pm
I haven't had an opportunity to do much on Old Honkey lately.
2 or 3 weeks ago I ran it up to Garry's to do an initial tune and eliminate some lean codes I was getting. We adjusted the fuel pressure regulator up a bit as it it would drop from 65 down to 55 or so under WOT. Then Garry did his magic on the computer and no more lean codes. Having said that, I went a bit far on the FPR adjustment as it was up to 73 psi at idle but I wasn't really concerned.
About a week later I was running errands and lost fuel pressure. Dropped from 73 down to a max of 25 (if I cycle the key a few times without running engine). found out that motor needs min of 16 psi to idle.
Turns out the hose between the pump and the pick up burst right at the clamp.
I'm almost wondering if it already had a small crack and a small leak which is what was making my 5.0 run crappy when it was in there and it finished itself off with the extra pressure required for the new system.
Anyway, yet another day sniffing gas fumes to get it running.
1977 Sport, 351w OBDII EFI motor, 4R70W auto, 4:88 gears, ARB lockers, 3.5" suspension, 33" tires.