6.0 Hard start hot NOT HPOP - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 23 (permalink) Old 04-01-2014, 03:22 AM Thread Starter
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6.0 Hard start hot NOT HPOP

Ok BoysÖ.here it goes. I bought my first diesel Ford truck after many gas ones and itís been all downhill. I got a 2006 F350, 6.0, crew cab long bed, 4wd with 200K miles, but it recently had a new crate Ford long block installed in it just before I got it. They also upgraded to ARP studs. I have the paperwork to prove the work was done. Seems the EGR or oil cooler failed and things went south. Since I got it I have installed 8 new Ford injectors with new hold downs due to potential bolt stretch if you reuse the old ones. I did this due to stiction(hard cold starts) and 3 injectors failed a cylinder contribution test at the dealer. Did the STC upgrade on the HPOP, upgraded stand pipes with Teflon washers, rebuilt the HPOP oil rails, new Ford oil cooler( Doorman crap one installed had deteriorated gasket), EGR delete (it already had this when engine was installed), blue fuel pressure regulator spring, alternator and 2 batteries, IPR, Fuel pump and water separator, SCT Livewire, and upgraded turbo oil supply line and drain. I also flushed the daylights out of it and put in a new radiator and heater core and Ford gold coolant. I only run Motorcraft oil and filters. I have done my homework. Thing runs greatÖ.when it starts. Hereís the problem. About 3 out of ten times she wonít start hot. Especially if itís shut off just for a few minutes. I know what youíre thinking but the HPOP is great! The IPR screen is clean and the HPOP pressure is way above 500 psi when it cranks hot!! I have to either crank the heck out of it like 3 or 4 times for 20 seconds or let it sit for awhile and cool down. The compression in all 8 cylinders is 390-400 psi and it passes leak down tests with flying colors so itís healthy internally. Also air tested through the ICP and no leaks as indicated by good HPOP pressure. FICM voltage is good, grounds and battery connections are good as well. It cranks nice and fast too. Fuel pressure tests fine. IT NEVER THROWS CODES EITHER. Iím stumped. I even threw an OEM cam sensor at it. I went out and bought a Scan Gauge II as my SCT didnít have a prompt to monitor cam/crank sensor sync. When itís cranking it never shows sync until it startsÖ.is this normal with a Scan Gauge? Even when the engine fires right up in the morning or the 7 out of 10 times she starts just fine hot, the sync doesnít change from 0 to 1 until she fires. When itís acting up, it never shows sync until it finally starts. Iím a really good shade tree mechanic but Iím ready to drive it in a lake!! Iíve dumped a ton of money into the thing to make it dependable and I really could use any and all help. THANKS and sorry so long, but figured you guys needed good background data!!
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post #2 of 23 (permalink) Old 04-01-2014, 04:10 AM
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Re: 6.0 Hard start hot NOT HPOP

Dummy plugs? I didn't see it in your post

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post #3 of 23 (permalink) Old 04-01-2014, 04:12 AM
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Re: 6.0 Hard start hot NOT HPOP

Check the fuel pressure also could have a weak pump

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Warren 175/75's
Fass titanium 125 w/ sump
Volant intake
5" mrbp turbo back 6" tip
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Sct itsx on iPad w/ Drew's tunes
Idp ficm tune
Snow water/meth
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post #4 of 23 (permalink) Old 04-01-2014, 06:00 AM Thread Starter
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Re: 6.0 Hard start hot NOT HPOP

Did the dummy plugs as well and fuel pressure was high normal!! Thanks!!
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post #5 of 23 (permalink) Old 04-01-2014, 03:57 PM
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Re: 6.0 Hard start hot NOT HPOP

It wont start if you dont have FICM sync. Its either missing the cam or crank signal. Find out which one it is. Hook scanner up when it wont start and check for RPM signal.

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post #6 of 23 (permalink) Old 04-01-2014, 05:05 PM Thread Starter
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Re: 6.0 Hard start hot NOT HPOP

Any suggestions on a scanner matthewd11?? Will my ScangaugeII show individual cam or crank signals or should I try something else. Thanks!!!!
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post #7 of 23 (permalink) Old 04-01-2014, 05:38 PM
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Re: 6.0 Hard start hot NOT HPOP

Your scangauge will show RPM, but i dont think you'll have a pid for cam counts. Something snap on based, i used a modis ultra, the IDS (factory scanner), or AE.
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post #8 of 23 (permalink) Old 04-01-2014, 10:09 PM Thread Starter
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Re: 6.0 Hard start hot NOT HPOP

Okay thanks,,,anyone have any suggestions on where to buy AE?? I think that's Autoengineuity, right??
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post #9 of 23 (permalink) Old 04-02-2014, 07:05 PM
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Re: 6.0 Hard start hot NOT HPOP

I sometimes use a dual trace scope when I have a problem like yours. Also what are your FICM voltages? Make sure your FICM plugs are tight and secure.
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post #10 of 23 (permalink) Old 04-04-2014, 05:11 AM
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Re: 6.0 Hard start hot NOT HPOP

I saw this very same issue 2004 Ford person last week the truck had been updated all real plugs dummy plugs STC fitting everything had been upgraded the truck still ran plenty of PSI started when it was cold and you would think it would be a dummy plugs or STC problem. I tore it down and checked the low-pressure oil pump looks fine.. Resealed and procceded. Pulled the HPOP out and tested the low pressure side seal. Completely blown. So this was a low pressure supply problem to the high pressure oil pump. Replaced pump and back in action... Pull your oil filter and see if it is retaining oil in the filter base untill you remove the cap.
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