PO676 Glow plug #6 clylinder - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 4 (permalink) Old 03-09-2013, 11:38 PM Thread Starter
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PO676 Glow plug #6 clylinder

Hi Guys,
Need some help here. I pulled a PO676 code on my 2000 F250 with 220k. I don't believe it's the GPCM because I replaced that a while ago when I had codes pointing to glow plug failure on the entire left block.
I ohmed the yellow/white wire from the GPCM plug to the valve cover harness and it showed .4 ohms.
Should I now test glow plug 6 or pull valve cover and ohm that wire?
Thanks!

2000 F250 Supercab 2wd, 6spd, DP Tuner, Southbend conFE, MBRP 4" turbo back straight pipe. DIY intake.
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post #2 of 4 (permalink) Old 03-10-2013, 01:03 AM
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I would test the pins at the valve cover on that side to see if you have continuity. If so, pull the cover & go to #6 , pull the conn. off & check the glo plug. You should have continuity; if none, the plug is at fault. If ok, ck the harness backwards from the plug to where ever you loose continuity. Good luck.---Bob
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post #3 of 4 (permalink) Old 03-10-2013, 08:12 AM Thread Starter
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Dang it. I was hoping I wouldn't have to pull the cover. I'll see what I find. Thanks!

2000 F250 Supercab 2wd, 6spd, DP Tuner, Southbend conFE, MBRP 4" turbo back straight pipe. DIY intake.
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post #4 of 4 (permalink) Old 04-29-2013, 06:43 AM Thread Starter
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I buzzed out the glow plugs from the uvch and #6 did not buzz. I ordered up the glow plugs from Rockauto.com. It was the cheapest I could find. The left side took me 2 hrs. #6 had a "small hole" in the tip. The other plugs didn't look too bad. I replaced them anyway because I didn't want to go through that again.

The right side looked like a nightmare. But it wasn't so bad. Took me 3 1/2 hours. Part of that was cleaning the crud off of the vc. I was able to get the very back bolt off using a 3" extension. I used a 6" extension and u-Joint to get the two bolts next to the AC box. The nut that holds down the dipstick tube to the vc was not cooperating. I used the 3" and 6" extension and hooked that to my 1/4" impact driver and it came out after a few seconds. The brackets for the heater hoses didn't come out that easy and I didn't want to break them or bust a knuckle. I didn't remove the filler tube or the AC compressor. Just had to maneuver the cover and heater hoses.

SES light is now gone!

2000 F250 Supercab 2wd, 6spd, DP Tuner, Southbend conFE, MBRP 4" turbo back straight pipe. DIY intake.
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