04 6.0 Possible HPOP Issue? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 9 (permalink) Old 02-19-2014, 05:22 PM Thread Starter
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04 6.0 Possible HPOP Issue?

I'm having some problem diagnosing my truck. It starts just fine hot or cold, FICM voltage is showing 54.5 volts on the scangauge IPR at idle is 22.5% and 77.6% at WOT. IPC pressure at idle is no less then 644 and I can get it up to about 2800 at maybe 1/3rd throttle. If I'm cruising down the road and floor it the IPR goes to 77.6 and my ICP drops to 933 or less and the truck just falls off. I replaced the IPC, replaced both fuel filters, and did the blue spring kit and am still having the same problem. I'm thinking I have a HPOP going bad. I'm running the 8k tow tune from Gearhead and am going to try the stock file just to rule out something there. The plan is to do EGR delete, headstuds, new oil cooler, and coolant filter at the end of March so maybe a new HPOP too? Unless somebody has any other ideas. Thanks for any input.

04 F-350 CC SB 4x4 6.0 auto 08 tow mirrors no muffler. ARP studs, IPR gen 2 delete Coolant filter, ECT coolant Xcal3 with tunes from Matt at Gearhead. Swamps 58volt FICM. 89 Peterbilt 377 N14 Celect Plus with a 13 speed mostly stock
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post #2 of 9 (permalink) Old 02-20-2014, 12:19 AM
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If possible get an ICP voltage reading not pressure reading and use that for comparison. Your ICP reading of 77% seems a little on the low side (reading I would expect to see is 85%)if you were having any kind of problem. Some of the older tunes alter the truth tables and show lower pressure readings that is why you always want to use ICP voltage and not pressure readings.
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post #3 of 9 (permalink) Old 02-20-2014, 05:14 AM
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"IPR goes to 77.6 and my ICP drops to 933 or less"

The above if accurate and not being skewed by the custom tuning like Len mentioned, makes me think hpop or leakage. I assume you have an early 04' yr model? If so, hpop is likely.

Harry

Jan 03' built 6.0/F250cc4wd trqsft/SCT-tuned by KEM-Performance/Garrett Powermax vg-turbo/blue spring mod/gauges=egt+boost+fuel+SG2/exhaust/airaid intake/DR 4.5 lift/dual bilsteins/315's/greasable ball joints/powerstop/smittybuilt/kc lights/high idle mod/roll-n-lock/Mobil Delvac1 ESP 5W40 with (Archoil AR9100 in the oil) and (AR6200 in the fuel)
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post #4 of 9 (permalink) Old 02-20-2014, 03:26 PM Thread Starter
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Yes its an early 04 build. I didn't get a chance to look for or load the other IPR code into my scangauge to see what that reading was. I'll try that today if I get a chance and post my findings.

04 F-350 CC SB 4x4 6.0 auto 08 tow mirrors no muffler. ARP studs, IPR gen 2 delete Coolant filter, ECT coolant Xcal3 with tunes from Matt at Gearhead. Swamps 58volt FICM. 89 Peterbilt 377 N14 Celect Plus with a 13 speed mostly stock
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post #5 of 9 (permalink) Old 02-21-2014, 02:35 PM Thread Starter
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So I loaded some more gauges into my scangauge and wanted to post the numbers. I put the truck back to stock also. VGT at WOT is 36 making 25lbs of boost. I saw as high as 85 on theVGT duty cycle at idle .ICP Volts went to 1.23 at WOT and .85 at idle. IPR still hits exactly 77.6 @WOT. My ICP volts seem low, I think I read that it should go as high as 4.7 volts. So with these numbers does anyone have any new ideas?

04 F-350 CC SB 4x4 6.0 auto 08 tow mirrors no muffler. ARP studs, IPR gen 2 delete Coolant filter, ECT coolant Xcal3 with tunes from Matt at Gearhead. Swamps 58volt FICM. 89 Peterbilt 377 N14 Celect Plus with a 13 speed mostly stock
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post #6 of 9 (permalink) Old 02-22-2014, 03:47 AM
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Sounds like a biased ICP sensor. You should see higher voltages. May want to double check with a DVOM or another scan tool.
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post #7 of 9 (permalink) Old 02-22-2014, 03:53 AM
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When you replaced the icp sensor, was the icp harness pigtail changed also? And if so, did any of the wires possibly get crossed?

If the highest icp your seeing is 2800psi, and it drops off after that, then my thought is the hpop has spun in the housing. With a good hpop you should be seeing 3600psi minimum under hard accel.

And yes, your icp voltage is low. Heres a chart...
http://www.backglass.org/duncan/ps60...l/ps60_061.jpg

Harry

Jan 03' built 6.0/F250cc4wd trqsft/SCT-tuned by KEM-Performance/Garrett Powermax vg-turbo/blue spring mod/gauges=egt+boost+fuel+SG2/exhaust/airaid intake/DR 4.5 lift/dual bilsteins/315's/greasable ball joints/powerstop/smittybuilt/kc lights/high idle mod/roll-n-lock/Mobil Delvac1 ESP 5W40 with (Archoil AR9100 in the oil) and (AR6200 in the fuel)
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post #8 of 9 (permalink) Old 02-22-2014, 04:50 AM Thread Starter
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I didn't change the pigtails and there was just a trace of oil in the connection which I cleaned out with some parts cleaner. As weird as this sounds, I'm thinking maybe I'm just due for an oil change. These 6.0's can be picky! In the past I've used mobile 1, valvoline premium blue, rotella t-6, and most recently the carquest house brand 5-40 synthetic. I've always added rev-x at every oil change and change oil at 10,000 miles. Like I said in my original post, I'm going to start changing oil at 5,000 miles after I do my studs and cooler. Current carquest oil with rev-x has 7,800 miles on it. Its worth a shot to try an oil change and see if it helps. Harry can you please PM me some pricing and ordering details on archoil?

04 F-350 CC SB 4x4 6.0 auto 08 tow mirrors no muffler. ARP studs, IPR gen 2 delete Coolant filter, ECT coolant Xcal3 with tunes from Matt at Gearhead. Swamps 58volt FICM. 89 Peterbilt 377 N14 Celect Plus with a 13 speed mostly stock
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post #9 of 9 (permalink) Old 03-22-2014, 04:53 AM Thread Starter
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Just wanted to give an update on this thread. I installed ARP's and ford gaskets, new ford oil cooler,*IPR*gen 2*egr*delete along with their up pipe and heavy duty oil screen, performance machine coolant filter kit, ELC coolant, and factory ford*HPOP. Every o ring was replaced and the*IPR*got a rebuild kit. I couldn't find any o ring damage anywhere but my old oil screen had some debris on it and was torn in one spot. The*IPR*also had some debris and was partially cocked to one side at the end. I believe the*IPR*and the*HPOP*were both to blame for my running issues and I just couldn't see being that far into the motor and not doing the*HPOP. Anyway, my truck runs excellent now and I'm loving my truck again

04 F-350 CC SB 4x4 6.0 auto 08 tow mirrors no muffler. ARP studs, IPR gen 2 delete Coolant filter, ECT coolant Xcal3 with tunes from Matt at Gearhead. Swamps 58volt FICM. 89 Peterbilt 377 N14 Celect Plus with a 13 speed mostly stock
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