I put a HPOP gauge on my truck today.

[hayjayhorses]

I set up a hydraulic gauge to monitor my HPOP pressure, on my ’00 F550, 4R100, 4.88, 4” turbo back, 290,xxx miles, stock tune. I made up a hydraulic line with an “O” Boss fitting on one end and the other end I put a 5000 psi liquid filled hydraulic gauge. I put the line into the 3rd port back on the (LH) drivers side head. I have it set up on the cowl so I can see it as I drive.

I did this because this truck just seems to have no guts when you are heavy into the throttle above 2200 rpm and the SES light will flash at this time also.

Here is what I got for reading, pulling about 2500# worth of trailer around town.

Idle 4-500 psi

Light throttle above 1700rpm 2200-2500 psi

Heavy throttle its at 1200-1400psi from 1500rpm to 2600rpm and will then the psi will climb to 2000ish up to 3000rpm

If I let off the gas and hold about ¼ throttle the HPOP pressure will go to 2500psi and it will stay there until I step on it again.

I could not get the HPOP above 2700psi and yes my oil is full.

Any suggestion? Time for an Adrenaline pump?

I shimmed all the injector magnet plates 0.002” about 30K miles ago. I have some reman stock 90cc single shots I am going to put in this truck as soon as I get my TS chip back (I wish I knew of Bill and Co. last year) with single shot tunes.