Glow Plugs - Ford Powerstroke Diesel Forum

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post #1 of 12 Old 10-22-2008, 02:17 AM Thread Starter
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Glow Plugs

I have a 1996 f350 and i was wondering if a couple of my glow plugs are bad
because when its 30 degrees out you have to turn the key 3 times for the glow plugs to warm up proprerly.

1996 F350 4x4 Powerstroke Diesel
Afe Stage 2
3 Inch Downpipe,Cat-Delete,90 degree elbow(ss)
Diy Exhust Brake
Hpx Crossover
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post #2 of 12 Old 10-22-2008, 02:20 AM
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Check the relay connections first.

1997 7.3 extended cab 8ft.

4" straight piped
DIY intake- 6637 filter
178K on the dash
Boost, PYRO, Trans temp gauges (auto meter)
33" nittos on stock height
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post #3 of 12 Old 10-22-2008, 06:19 AM
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is there any easy way to check glow plugs too? or would you have to pull them out and test manually? what is the average life expectancy for these glows?

-Matt

Late 99 (2/99) Black F250, CC LB 4x4 Lariat 214k. All Stock for the moment...

1995 PSD, ext cab, one wheel wonder , 297k miles, 30k on wvo. totaled 5/8/11 RIP This truck is for sale as a parts truck (Jason is about to receive forged rods, and drop kick his PMR's)
DB high torque starter
DIY 6637
Marinco Mod
DIY Electric fuel w/ wvo conversion

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post #4 of 12 Old 10-22-2008, 12:20 PM Thread Starter
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this morning it would crank and crank but woundlt turn over
and it was putting out white smoke

if theres a way to test them with out yanking them out

i plan on replacing all if theres one or two bad ones

1996 F350 4x4 Powerstroke Diesel
Afe Stage 2
3 Inch Downpipe,Cat-Delete,90 degree elbow(ss)
Diy Exhust Brake
Hpx Crossover
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post #5 of 12 Old 10-22-2008, 12:32 PM
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there are 2 plugs on each head, they go through the valve cover. get a multimeter and check resistance between the OUTSIDE pins on each plug and a good ground (block or alternator), should be between like 0.1-2.0 ohms. anything more and they are bad.

check relay first. theres detailed instructions in tech files.

i just did this yesterday and replaced 2 and gonna gotta order 2 new plugs.

-ReD

Fire Lieutenant/Paramedic, Tinkerer

1990 Jeep Wrangler YJ
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post #6 of 12 Old 10-22-2008, 12:49 PM
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if you have a test light put your clip on the pos side of the battery and then were the wire harness goes into the valve cover pull the clip loose there will be 4 of the same color wire on each side of the engine.put your test light on each of those wires one at a time if the light lights then that glow plug works at least some if they dont light then that is a bad glowplug.hope this helps.but first make sure you are getting power to your 2nd large prong on the relay when the key is on.

EARLY 99 POWERSTROKE:wicked wheel turbo,banks 6gun tuner,diy intake,4" straight pipe,2003 pcm,08 mirrors,08 tailgate,03 headlights,tru-cool max tranny cooler,203 degree thermostat,3 guage pod with tranny,egt and boost,leveling kit,285/75/16.

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post #7 of 12 Old 10-22-2008, 12:56 PM
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the glow plug relays go bad look at the relay if it look burt or take a wrench to the terminal turn them very gently if the stud is loose replace it they get very brittle from the heat they stay on allmost 1/2 min in the cold and draw almost 100 amps
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post #8 of 12 Old 10-22-2008, 12:59 PM
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out of curiosity, where is the relay?

-Matt

Late 99 (2/99) Black F250, CC LB 4x4 Lariat 214k. All Stock for the moment...

1995 PSD, ext cab, one wheel wonder , 297k miles, 30k on wvo. totaled 5/8/11 RIP This truck is for sale as a parts truck (Jason is about to receive forged rods, and drop kick his PMR's)
DB high torque starter
DIY 6637
Marinco Mod
DIY Electric fuel w/ wvo conversion

"A clean house is a sign of a mis-lead life."
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post #9 of 12 Old 10-22-2008, 01:12 PM
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right behind your fuel bowl on top of the engine it has 4 prongs 2 small and 2 big the one large stud has 12v all the time the other large stud only has 12v when the key is on if not the relay is bad

EARLY 99 POWERSTROKE:wicked wheel turbo,banks 6gun tuner,diy intake,4" straight pipe,2003 pcm,08 mirrors,08 tailgate,03 headlights,tru-cool max tranny cooler,203 degree thermostat,3 guage pod with tranny,egt and boost,leveling kit,285/75/16.

http://i724.photobucket.com/albums/w.../mybaby001.jpg

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http://i724.photobucket.com/albums/w...grizzly001.jpg
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post #10 of 12 Old 10-22-2008, 02:20 PM Thread Starter
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i think its the relay because its it says 12.75 on one side and like less then a volt on the other side

1996 F350 4x4 Powerstroke Diesel
Afe Stage 2
3 Inch Downpipe,Cat-Delete,90 degree elbow(ss)
Diy Exhust Brake
Hpx Crossover
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