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 :thumbsdwn: 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.

[907DAVE]

You might have a HPO leak some where, how are your injector o-rings?

Does the oil reservoir ever drain down after parked for a long time?

[hayjayhorses]

yes the HPOP reservoir will drain down after a few days of sitting I have checked it by unscrewing the oil pressure switch on the top of the reservoir an dropping a screw driver down there, and there is like an 1/8" of oil on the end.

But even with the oil reservoir empty the truck with fire right up and run, it just take 6 to 8 seconds for the oil pressure gauge to jump up to normal.

I have not pulled the injectors yet, I want to drop in the single shots when I get the chip back so I don't have a rough idle issue.

I have seen ripped/deteriorated O rings on a lot of OBS truck not really on SD

[907DAVE]

Sounds like you may have an upper injector o-ring(s) that are bad.

[hayjayhorses]

I will pull my injectors tomarrow and see. thanks

do know how rough the idle is, using single shots in a SD with no tuneing?

[907DAVE]

Its rough.......like having a lope tune without the tune.:D

Of course that was with my 238/100% hybrids on split tuning, so I am not sure how bad it will be with your injectors.

[hayjayhorses]

Well i am going to throw in the sngle shots and see what happens.

[hayjayhorses]

I pulled my injectors. Before I pulled the injectors I ran the engine with the valve covers off and on 5 injectors oil was spiting from the hole in the spacer between the armature and the solenoid. Some shot a small amount and other a lot.

Any answer on why this happens?

As for the O rings I found all the top square O rings were pushed up in one spot were the steel ring is open or split, on a few of them the gap in the steel ring was more then 3/8”. One square O ring was broke in this spot. As for the round O ring just below the square O ring, they all appear to be fine.

I am going back up to the farm to install some single shots I did a Rosewood DIY rebuild on. Then I will post the results.

[88Racing]

That's interesting that the o-rings would push up like that I would assume to see more split ones than anything?:shrug:

[907DAVE]

I pulled my injectors. Before I pulled the injectors I ran the engine with the valve covers off and on 5 injectors oil was spiting from the hole in the spacer between the armature and the solenoid. Some shot a small amount and other a lot.

Any answer on why this happens?

Sounds like the upper seat in the poppet valve is worn allowing oil to sneak by. IIRC there shouldn't be oil spitting out of those holes anyways.

As for the O rings I found all the top square O rings were pushed up in one spot were the steel ring is open or split, on a few of them the gap in the steel ring was more then 3/8”. One square O ring was broke in this spot. As for the round O ring just below the square O ring, they all appear to be fine.

I have seen that a few times as well.

I am going back up to the farm to install some single shots I did a Rosewood DIY rebuild on. Then I will post the results.

Cant wait to see how it changes ICP with the new injectors.:D

[hayjayhorses]

here is a pic of the pushed up square O ring, just a note the only part of the O ring that is pushed up is were the opening is oh the steel ring that holds it down.


How can I make the pics bigger??

[Kwikkordead]

Subscribing.

[hayjayhorses]

so i put in the single shot injectors got the truck started after a few tries and it idle nice for about 10 minuets, then cut out:shrug:. Now it cranks over make oil pressure at the resivoir but no HPOP pressure:confused:, using a mechenical gauge.

I checked all fuses, the fuel heater curcit has power.

Mabye I have some crap in the IPR vavle? I am going to pull it and check it out. If some one has a sugestion you can call me I will be out in the barn working on it.

413-222-8286

[hayjayhorses]

It turns out the HPOP crapped out :thumbsdwn: I had a few hanging HPOP hanging around, so with 907dave’s help I was able to figure out witch one was the 17* pump.
When comparing the bad pump and the pump I decided to use as a replacement I notice the bad pump had some end play :confused:(1st when checking the gear bolt torque before I pulled the pump) I could go in and out with the HPOP shaft about 1/16”, the other pumps had no end play that I could tell. Also the bad pump spun quite easy by hand with the gear on it, the good pump was harder to turn.

The weird thing was after I put it all back together, it would not start and only push about 150 psi on the HPOP gauge:throwup:. So after playing with the wiring and a few IPRs I had laying around I grounded the yellow/red wire (so the IPR would pull hard) I had a friend crank the engine and the HPOP pressure jumped to 2500psi, :cool:. Then I undid the ground and the truck stared right up and ran nice:woot:

I wonder if the IPR was jammed up and the 12volt was able to free it up.

I took the truck for a drive around the throttle is very snappy, and it sounds just like my ’95:evillol:Wake up the neighbors. The HPOP pressure was able to maintain 2600-2800 psi at WOT from 1800-3000 rpm:happy-dancing:. I noticed the boost would only go to 12 psi and the EGT was lower also:hmmm:. I wont know what I am dealing with until I hook up to my hay trailer tomorrow and head west.

It did idle like a big cammed gasser once it warmed up, and also idles at 900-950 rpm at a stop in drive

I will post my finding after I get home from NY with my load of hay tomorrow.

Thanks again Dave and Bill for the help.

[hayjayhorses]

I ran this truck almost 800 miles since the last post, and I like what I have experienced:woot:. I ran half of the miles empty (gross 17,260#) and the other half loaded 37,940#. I from western Mass to central NY yesterday to get the hay then from home to southern CT to deliver the hay.

I was getting less that 7mpg:cry-blow: round trip the last few runs, This time a I did 13ish:happy-dancing: empty on my way to NY (topped off the diesel just before I loaded). I ran 65-70 mph effortlessly.

On the way to NY there is a 6 mile hill on I90 westbound that is about a 7% grade (I could be wrong). This truck has always had to run in 3rd gear like 50 mph with my foot to the floor to pull this hill, yesterday I was able to pull it 65-68 mph with about 2/3 throttle and I was able to stay in 4th gear (OD) the whole way there:cheesy smile:.

The boost was low with the red waste gate actuator hose hooked up, I could only get 11 psi and the EGT would only get to 1200*, So I unhooked the red hose and was able to do max boost of 19-21 psi and the EGT would only get to 1050*. I don’t think I am getting any turbo surge.

On the way home I was able to pull the load 60-65mph (that’s the fastest I will run loaded) with ease, before 50-55mph was a struggle. There is 4 or 5 hills I would normally be in 2nd gear by the top, I was able to hold 4th most of the time and only down shifted to 3rd, no 2nd gear on any hills. I didn’t fill up yet but judging by the fuel gauge level, I think I got 10mpg:woot: (70% loaded 30% empty) I did not refuel yet.

A few things to keep in mind, it was a picture perfect 2 days in the north east high in the 70’s and no wind. Keep in mind wind is a big factor, all winter long there is a good west to east wind, so on my way out to NY I am fighting a head wind :cursin:(it can really hurt mpg’s) and on my way home I am getting a little push (it helps). Also before I put in the single shot injectors and replaced the HPOP, I was only able to get 1200psi HPOP with my foot in it, this is not a marical, the truck is just running correctly now.

As for the HPOP pressure, it will max out at 2800psi, but not until I get it to 2650rpm. It will hold 2500-2600psi @ full throttle from 1800rpm and up.

I you are scratching your head I will fill in the blanks, maybe. ’00 F550, 7.3, 290k, 4R100, billet low stall converter, 4.88, 4” turbo back, 8R19.5 Cooper C140, 6637 intake, SP TCC lock, 90cc single shots. No tuning but I need/want it.

Now for the issues, Rough idle sound like a lame cammed up gasser. Has a very high idle (950rpm) in gear, but smooth. You need to stand on the brake at a stop with the low stall TC. When cruising with a light throttle, it is a bit herky-jerky, the power is on and then off. This is what Bill should be able to straighten out.

[907DAVE]

Awesome!

Glad to hear it's up and working for you.

[hayjayhorses]

what should a 17* HPOP max out at (pressure), I am also thinking I may need more then 90cc of fuel.

[907DAVE]

All depends on tuning, and injector type/ size.

But with stock programming all you are going to see is 2800psi.

[hayjayhorses]

thats what it's doing.
If I was to crank it up with tuning, high high can it safely go?

Will bumping the HPOP pressure do much for power or economy?

I want to do all I can to squezz out all mpg i can.

[907DAVE]

thats what it's doing.
If I was to crank it up with tuning, high high can it safely go?

Seems like most tuners are raising it up to 3000-3200. After that you run the risk of floating poppet valves.

Will bumping the HPOP pressure do much for power or economy?

Both actually, increasing ICP also increases MPG's because of the higher atomization and slightly increased timing, same goes for HP's. But there can be a limit as the HPOP's can only support so much.

I want to do all I can to squezz out all mpg i can.

See blue.

Do you have a chip on order?

[hayjayhorses]

I sent Bill a message last week, (he has not responded yet, but thats OK I don't have the cash rite now) about getting an FU package and 3 chips, I want to chip a '99F350, '99 F450, and '00 F550 all with auto. I am told they are the same definition file.

Are the FU tunes, PCM specific or Definition File specific? Can I run one FU package (with additinal) chips on these 3 trucks (same definition file)?

[hayjayhorses]

i was thinking it would be nice to run able to run the HPOP at max psi from 1800rpm and up:evillol:, at like 75% throttle so it wouldn't down shift.

The trucks with 3.73 cruise nice at 1800ish R's down the highway.

wouldn't the mpg go up with 3000-3200 HPOP psi at 1800-2000rpm cruising rpms?

I had a 10k ohm mod on a '95 PS that gave me like 1-2 mpg gain.

will the rough idle (due to the single shots) hurt anything?

[907DAVE]

Are the FU tunes, PCM specific or Definition File specific? Can I run one FU package (with additinal) chips on these 3 trucks (same definition file)?

As long as all the trucks are in the same PCM family then you are good to go. :D

[907DAVE]

wouldn't the mpg go up with 3000-3200 HPOP psi at 1800-2000rpm cruising rpms?

Maybe, but you will kill your HPOP in short order!

will the rough idle (due to the single shots) hurt anything?

Doubt it, as long as you dont let it idle for extended periods. You really need to get a chip for that thing, you will be much happier!

See Blue

[hayjayhorses]

yeah I need to get a chip, but I just spent a bunch of cash on trailer brakes and tires. Plus every spirng I buy a lot of fertlizer.

I just put together a big construction hay deal, 7000+ bales so that will help.

[hayjayhorses]

I have about 5000 miles on the shingle shots. Have haven't unhooked my 32' flatbed goosneck from this truck since I put in the injectors and the HPOP in.

I have a 91 gallon and 40 gallon fuel tank, I fill up at the same place most of the time (Pride in Palmer, Ma 2.999 the past 3 weeks) I check my mileage every fill up. Sometimes I only put on 100 miles then top it off the last tank I ran 1148 miles (took 105 gallons 10.9mpg)

I did a test run last week I filled up 145 miles from home and ran all high way no faster then 60mph mostly 55. I got 15.5 mpg:happy-dancing:, with an empty 7,500# flatbed trailer, with a F550, with 4.88, that is awesome. It was really hard to drive that slow for 3 plus hours. That was the best yet.

the wost was 9.3 mpg hauling a farm tractor (I ran 75 mph 2600 rpm) to New York and then a load of hay home (60-65 mph), this is very good for this kind of hauling.

I plan on putting a ZF6 :woot:and a F450:thumbsdwn: Dana 80 3.73 (unless i can find 3.73 for a spicer110:shrug:) with a locker. Then I should be able to do better mpg.

[epowers777]

Welcome to guzzle's Helper/Lift pump Web Page (http://www.guzzle7pt3.com/pump.php). try this out. It might help your probablem. Make sure you read the whole thing. It talks about high rpm fuel.

[hayjayhorses]

Welcome to guzzle's Helper/Lift pump Web Page (http://www.guzzle7pt3.com/pump.php). try this out. It might help your probablem. Make sure you read the whole thing. It talks about high rpm fuel.

thanks epowers777, they have some good stuff, also after reading the bottom of the page, I can see Guzzle and i have much more in common than powerstoke diesel