6.0L glow plug check - Diesel Forum - TheDieselStop.com
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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 10-10-2012, 09:52 AM   #1 (permalink)
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6.0L glow plug check

i am getting 0.0 ohms checking each of my glow plugs at the connectors at gpcm. i have a 2006. i have seen where a high reading means bad glow plugs what does no resitance mean? help
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Old 10-10-2012, 10:05 AM   #2 (permalink)
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i am using a fluke meter so i am sure of the readings
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Old 10-10-2012, 10:44 AM   #3 (permalink)
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Don't worry about it. If you have a bad glow plug it will set a code and will tell you which cylinder is bad. If you do have one bad then I would change them all since you have the wheel liners out and the plugs are cheap enough, about $10 each. "0" resistance means it is an open circuit, so one of the probes is not making a good connection, probably your ground to the block.
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Old 10-10-2012, 10:58 AM   #4 (permalink)
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I'm not certain that glow plugs are monitored individually. I do think they are powered in parallel per bank, and I know 0 ohms is a short, not an open.

Each bank will draw 150-200 amps when cold, so there isn't much resistance there. Maybe you didn't get absolutely 0, just a small r4eading and thought it to be 0. Use the old r=e/i

Have you a clamp on ammeter to go with your fluke mm? If so, reading current will tell you.

ps: If it were actually 0 ohms, the glowplug module would fry and then you would get a code.
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Old 10-10-2012, 12:11 PM   #5 (permalink)
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It will set a code for a specific plug. I had a #7 code at the beginning of the summer. Changed them all, not bad once you get the plastic wheel liners out.
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Old 10-10-2012, 07:57 PM   #6 (permalink)
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And it's only ~10amps per GP.
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Old 10-10-2012, 08:44 PM   #7 (permalink)
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Quote:
Originally Posted by rock_doctor View Post
It will set a code for a specific plug. I had a #7 code at the beginning of the summer. Changed them all, not bad once you get the plastic wheel liners out.

Mine set a code for #2 - I replaced #2 and the code was still there. I checked the harness and it was good. Replaced the GPCM and that fixed it.
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Old 11-03-2014, 02:59 PM   #8 (permalink)
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2006 6.0

Hey Guys,

Hey Guys,

I went from all is fine starting to having to plug in the block heater to get it start on a warm day. I since put it on a code reader and it says 1-8 low voltage code or something along those lines. I would think with all of those codes, it might be something else? Anyway to find out prior to pulling the wheels etc?

Thank's
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Old 11-03-2014, 03:08 PM   #9 (permalink)
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2006/ 6.0

dual post...

Last edited by Billy H.; 11-03-2014 at 04:46 PM. Reason: Dual post
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Old 11-03-2014, 04:08 PM   #10 (permalink)
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Quote:
Originally Posted by RatherBNtheWoods View Post
... Have you a clamp on ammeter to go with your fluke mm? If so, reading current will tell you. ...
Many clamp-on ammeters measure AC current only, and will indicate zero no matter how much DC current is present. Make sure you know what your instrument is capable of.
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Old 11-03-2014, 04:41 PM   #11 (permalink)
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Clamp on Ampmeter

The one I borrowed only does Ac, so it's worthless.

Quote:
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Many clamp-on ammeters measure AC current only, and will indicate zero no matter how much DC current is present. Make sure you know what your instrument is capable of.
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Old 11-03-2014, 04:45 PM   #12 (permalink)
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I did have the initial #8 cylinder code pop up and two weeks later, all of them. I am guessing it's the GPCM. Be difficult to believe it would be the harness's and all the plugs at once. The truck runs great when it warms up, it's a bear to start cold and it run's like crap!
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Old 11-03-2014, 05:18 PM   #13 (permalink)
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For all to go out at once if it is not a wireing issue then it is the module.
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