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  #1  
Old 08-03-2007, 07:46 AM
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HPOP TEST

Guys, is it possible to take the high pressure oil lines off the high pressure oil rails, cap one of the lines off and tie the other line into a high pressure gauge.
If its possible would this be an good test for determining bad HPOP?
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Old 08-03-2007, 07:49 AM
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If you did that the motor would not run. I know there is a way to tie into the pump to check pressure but can't remember. Now that I've though about it. You would have to remove one of the fittings in the pump or head. Install a "tee". reinstall the fitting and oil line. In the tee you could install a gauge or a hose then gauge.

Also ford can run a diagnostic that will show you pressure output from the pump.
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Old 08-03-2007, 07:53 AM
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There are 2 ways to measure the oil pump's performance.

If you have access to a scantool, hook it up to the trucks OBD connector, and go to the "datastream"...scroll through the sensor values, until you find ICP (or injection control pressure)...this is your HPOP's "oil pressure".

***NOTE: if you are running any kind of "box" such as the "Edge EZ" or the "Banks Six Gun" you either have to remove the aftermarket jumper harness/plug at the ICP sensor, and reconnect the factory harness by itself. If you are running a home made "10k mod", etc...which plugs/taps into the ICP sensor wires (or connector pins), you will have to remove it as well, or proceed with getting the parts together to run the mechanical gauge, as the scantool will not receive accurate data from the ICP sensor if its signal is being modified from any one of thes "ICP foolers".

To test the HPOP's output, you will be looking on the scantool for the line labeled "ICP" and it's units should be in psi not volts. Some scantools measure ICP in kPa (kilopascals) which you can convert to psi after you take your measurement in kPa.

1kpa = 0.145psi

(for example 19,310kPa = 2800 psi)

Put your chip in its' highest setting, and go out on the interstate (while having someone watch the ICP value on the datastream) and start at about 60mph...

FLOOR the pedal, and stay in it, 100% from ~60-90mph...what you're likely to see (on the scantool) is that the ICP will spike up rather quickly, to 2800-3000psi or so, and then the longer you stay in the pedal...the ICP will slowly drop and drop and drop...the ICP will eventually stabilize (stop dropping).

WHERE the ICP levels off can be some indication as to the condition of your HPOP.

If your truck can maintain 2800+psi then you are one of the FEW folks that have a terrific HPOP.

I would estimate that 90% of the Power Strokes can only maintain ~2200(+/- 200)psi of HPOP pressure, or ICP...5% are above 2600, the other 5% are below 1900psi...


depending on how low (or high) of ICP you are able to maintain will greatly affect which model of injector I would recommend.

If you don't have access to a scantool, then go to your local hydraulic supply house, and have them make you up a mechanical gauge. You might spend $60 or so on high pressure hose, fittings, and a quality 0-3500psi liquid filled gauge....but having this hose available for future diagnostics might be more valuable than you think.

The hose which you will need will need to be about 40" long, rated for (minimum) 3000psi working pressure (12k psi burst rating!) with the gauge on one end, and a #6 female JIC swivel fitting crimped onto the other.

You will also need an individual fitting to screw into the head to go from the head to the hose.

This single fitting will be a 90degree fitting # 5 "male boss" (sometimes called # 5 o-ring) on one end of the 90, and a # 6 male JIC on the other end of the 90. Our local hydraulic shop would label such a fitting as 5MB-6MJ90

"JIC" is nothing special...it's just 'hydraulic talk' for a 37degree flare fitting...standard hydraulic stuff here...nothing rare by any stretch.

Looking at the top of (either) cylinder head, you'll see the factory stainless braided oil lines (one to each head) then you'll see a few bronze colored plugs... (Engine off, of course) Using a 5/8" wrench, remove any one of the bronze plugs, and install the 90deg fitting into the hole. (save the plug for reinstallation , after testing). and the O-rings are reusable, unless brittle, cracked, etc...

The single 90deg fitting will have a "jamb nut" on the O-ring side...screw the fitting into the head, "aiming" the 90 away from the turbo, intercooler pipes, etc...and then tighten the jamb nut, to "squish" the O-ring also locking the 90 from "spinning" around as you attach the swivel end of the hose to the 90. No sealants, loctite, or teflon tape are needed on "JIC" or O-ring fittings...and don't overtighten them...usually about 180degrees with a wrench past finger tight...check for leaks prior to getting too far from home...

run the hose, away from moving parts, electrically conductive junk (like batteries, glow plug relay, starter relays, etc) ..and just route the hose up through the cowl toward the windshield...for short term testing purposes, we just lay the gauge up under a windsheild wiper, and go drive...testing it just like I describes previously...chip in the highest setting, floor the truck, etc....

If you can maintain 2800+ psi of ICP, then any injector 250cc's and under will perform exceptionally well.

If you can maintain 2400psi then that's not bad, not great either.

2200psi is mediocre, and full performance from any injector will not be achieved with that HPOP, though power WILL go up with nearly any injector, driveability (excessive smoke) might be an issue.

If you cannot maintain 1900psi, you might seriously consider an aftermarket dual HPOP system, or our Gen3 HPOP. Nearly any larger injector is going to make the truck feel sluggish, and smoke excessively



HOPE THIS HELPS
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Old 08-03-2007, 07:56 AM
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You can get a "T" fitting at a hose shop with a male end on one side, female on the other. I think it number six size fittings on the oil line. The bottom of the "T" is 1/4" pipe thread. Put a 3,000 psi oil filled guage on the 1/4" and run the truck.
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Old 08-03-2007, 08:15 AM
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I was just wondering if this would be an adequate test. My truck doesn't run. Yesterday I took one of the brass fittings out of the head and screwed in a 5,000psi pressure guage. After cranking for 30 seconds the pressure needle moved a little(there was no reading low enough on the guage). Is this a sure sign of a bad HPOP?
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Old 08-03-2007, 08:28 AM
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There is a small fitting on the top of the motor you need to remove it and see if the oil is in the hpop reservoir. Top of the motor allen wrench type plug.
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Old 08-03-2007, 08:45 AM
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The oil resivior is full, even draind the oil out and replaced it with new oil. Because the truck has been down for a while and has been cranked one numberous times and to my understanding it uses unfiltered oil on initial start up. I am the guy in the thread "will not start". I had a diesl mechanic hook a scanner up, he read some codes and then turned the engine over and said the was no ICP Pressure.
I was wanting to test the pump pressure myself with a manual gauge and was wondering if the way I was doing it was appropriate.
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Old 08-03-2007, 09:21 AM
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Cranking psi is 500#
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Old 08-03-2007, 05:42 PM
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Just got through blocking off one of the HP lines and hooked up a manual gauge(5000psi) to the other and turned engine over for 30 sec. Couldn't get a reading so I hooked up a 200psi gauge and cranked again for 30 sec, gauge read 15psi. Cranked again for 30 sec, again 15psi. Repeated this process 3 more times, same results.
From the looks of it I think I may have a bad HPOP.
Anyone know of a good place to get one?
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Old 08-03-2007, 09:41 PM
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Now is the time to think if you are wanting bigger injectors down the road. If so you may want to go with a big oil system, suck as stealth or a terminator. If not factory runs I think 900.00 or so bux
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