I have had it on my truck now for about 3.5 months now it was at 15psi idle and 22 wot now my idle psi has dropped to 12 but wot is still the same.Will a dirty filter cause this I have not checked it yet but will tomorrow.I changed the filter when I installed the pump I would say that I have about 4000 miles on it.What else would cause this. THANKS

Man that's awesome. I wish my Assassin could do that... :banghead:

Isn't the Fuel Boss modeled off the Assasin?

Isn't the Fuel Boss modeled off the Assasin?

Or is the Assassin modeled off of the Fuel Boss? Either way, they're basically the same setup. I've tried a million things with the regulator, changed up the return, and I still can't get a good pressure span like y'all do. I could buy an expensive regulator, but I'm just gonna get a FASS when the money comes, and hopefully call it DONE...

I'm assuming Richard from Glacier Diesel ? Excellent customer service

yes very!

Or is the Assassin modeled off of the Fuel Boss? Either way, they're basically the same setup. I've tried a million things with the regulator, changed up the return, and I still can't get a good pressure span like y'all do. I could buy an expensive regulator, but I'm just gonna get a FASS when the money comes, and hopefully call it DONE...

That's really weird. I have been running my assassin for quite a while now and still maintain 14-15 at idle and 19-20 at throttle and 20-22 at wot. No issues. Sent from my iPhone using Tapatalk - now Free

Just wondering where the best place would be to put a tee inline to hook up a fuel pressure gauge. I'll be ordering the fuel boss as soon as glacier re-stocks them.It would seem to me that the true indicator of fuel pressure would be inline post filter before the VP.Opinions?Thanks

That's where I have mine. With it between the filter and vp you'll know if there are any problems from the filter back.

That's where I have mine. With it between the filter and vp you'll know if there are any problems from the filter back.

More importantly, you know the exact pressure getting to the VP44.

That's where I have mine. With it between the filter and vp you'll know if there are any problems from the filter back.

Ok, cool. I see a small section of rubber hose in the supply line - just above the power steering cap, think I'll put the tee there. Is that rubber hose factory setup? Or is it possible someone previously cut the steel supply line? How was it on your truck? Thanks

Factory setup is a steel line from the filter to the vp. It must have been changed.

Mine had a short length of rubber hose between the canister and the VP from the factory. Still have it.

Mine had a short length of rubber hose between the canister and the VP from the factory. Still have it.

Maybe it was a change added in 2002? The hose is short on mine, only about 2" long with a couple of factory looking squeezie-spring style clamps. I havent taken mine apart yet but I guess if there is a factory type hose barb/bump on the end of the steel lines to hold the hose on, well that could be tell tale factory. Regardless, it sure looks like the perfect place to insert a Tee with a npt fitting to hook up a pressure guage. It's a really small section though and I'm thinking I'll have to cut it some to fit a decent Tee. Did you put a Tee in there dripley?

Yes I did. But I did install a big line kit from Vulcan and eliminated the stock line(still have on a shelf in the shop).This is what I did Installed a tapped tee into the 1/2" line.

Thanks for the detail & great idea putting a valve on the Tee!

I have a mechanical gauge in the cab. The needle valve serves 2 purposes. 1 is to protect the gauge from the pulses the VP puts out. It is barely cracked open. This is its primary purpose. 2 if for some reason the gauge were to start leaking I can shut it off until I can fix it.