Posting from cell phone while driving... forgive the shorthand...
92 ctd - installed low pressure piston pump 2 years ago. Has always shown 17 to 20 psi at cruise, but could suck it to 0 if WOT For too long.
No recent fuel system mods. Added water/meth and changed rear gear to 3.73 two days ago.
Isspro performax gauge now showing 30 to 35psi after.the filter. WOT only brings it to 20.
Truck seems to be running a littl rough, especially at idle, but absolutely no loss of power.
Please help, I still have 1500 miles to go and it is a holiday weekend... FML