High fuel pressure
Posted: March 21st, 2017, 4:30 am
In preparation for the stroker I'm building for my '94 YJ (and to perhaps get a couple of horsepower back to a dying engine) I have installed a map adjuster and adjustable fpr. To my surprise the pressure crept up to 60 psi and wouldn't move any lower. My fpr was used on a different efi system recently so I felt that wasn't the problem. I reinstalled stock fpr and still at 60 psi. Next I removed fpr and installed aluminum blank I made to replace fpr, so NO regulator, and STILL 60 psi. I ran out of time to diagnose further, but I think it's safe to say I have a restriction in the return line somewhere. That would probably explain the rich running smell...Haha.