Bad alternator? - Page 2 - Ford Powerstroke Diesel Forum
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post #11 of 20 Old 01-01-2013, 06:28 PM
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https://www.fleet.ford.com/truckbbas/non-html/Q91.pdf


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post #12 of 20 Old 01-01-2013, 06:49 PM
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This is a video I found, not sure where the info is coming from about the alternator not charging on startup, but it's plain false.......https://www.youtube.com/watch?v=sTfu...e_gdata_player
These trucks pull a massive amount of power during startup and before the glowplugs shut off. The heated mirrors are also always on, I make sure my auto headlights are off, the ac is off, and the heated seats are not activated.

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post #13 of 20 Old 01-01-2013, 06:54 PM
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hmmm you guys are going to make me attempt to check amp draw on a bank of glowplugs. I'm curious now

-Matt

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post #14 of 20 Old 01-01-2013, 06:57 PM
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Originally Posted by sinner6.0L View Post
hmmm you guys are going to make me attempt to check amp draw on a bank of glowplugs. I'm curious now
That would be great info, I don't have an amp meter, just a very expensive fluke. Lol.

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

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post #15 of 20 Old 01-01-2013, 06:58 PM
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sorry southend. I just dont believe that video something is going on there. I believe that engine in the video is warm which would also help starting.. anyways, i have asked lots of questions about this to people that work on these and they all say that the low voltage is typical upon cold startup. Like i said, its in the pcm i stated before in my other thread. Its by design from seeing how the wiring is on the pcm. I just dont want to see people freak out over nothing if thats the case... My truck has done this since day 1...

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post #16 of 20 Old 01-01-2013, 07:00 PM
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Here is a video I made a couple months ago, my volts start to climb after start up, then I hit the high idle switch and volts really start to climb, then GP shut off and hit 14's. I have the dual alt set-up.

http://youtu.be/BEULfjYBXPo




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X-3 tunes by DJ'S,QT,GH,ID. Gryphon FICM tunes, ARP studs,Stage 1turbo,ATS coolant recirc lines,Swamp's 48v ficm,coolant filter,AD2,Snow Perf stage II,EGR delete,4" turbo back straight pipe,S&Bintake,Quad "A" pillar autometer gauges,Suncoast Tri Disk Conv.,Billet input shaft,Suncoast superduty rebuild kit,Trans-go shift kit,Mag-Hytec trans pan,CFM+ elbow,ccv mod,15K reese 5er,17" LCD TV/DVD,Cobra 29 Nitewatch CB
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post #17 of 20 Old 01-01-2013, 07:01 PM
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my amp draws on all 8 brande new glow plugs and plug harnesses were at 191-193 amps

Late 04 f350 lariat.

bpd
marty's regulated return
205/75 injects from holder's
WPE stage 3 ported intake
64.5 borg warner fmw ,compounds in the works now! Comp turbo set up
Warren comp trans
all the typical mods

Big thanks to Dale! The man is a true professional
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post #18 of 20 Old 01-01-2013, 07:04 PM
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Oh so it's one or the other. Huh, a little odd, but,,,huh. I've only measured alternator outputs and glow plug draw once. That one time must have been the time the ECM chose the primary alternator. May have to measure alternator outputs a few times if I get bored at work one day.

Hey sinner6.0. Mine measured around 180A per bank at initial time zero, and quickly dropped down to around 65A per bank as the plugs heated.

2006 built 05/05 XLT CC DRW PSD. Captain chairs, sunroof, polished aluminum wheels, 6speed, manual 4x4. 285K miles with 130K problem free miles on new engine.
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post #19 of 20 Old 01-01-2013, 07:06 PM
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Mine will show about 11.6v for the first few minutes then jump to 13.6. It's normal.

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post #20 of 20 Old 01-01-2013, 07:23 PM
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In the video I posted, it says the temp was 30°, it sounds like a cold engine, a 7.3 at that, lol. In both videos that were posted, you can see the voltage rise after starting, there is no way a battery can recharge itself, the alternators are charging as best as they can on start up. I see it no other way.

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

SEE MY OIL COOLER REPLACEMENT AND EGR DELETE - http://www.powerstroke.org/forum/gen...tml?highlight=
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