Glowplug's wear out??? - Ford Powerstroke Diesel Forum
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Old 01-25-2007, 10:02 AM
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Glowplug's wear out???

Buddy of mine has a 2001 PSD, he's saying he has to cycle the key back and forth a few times (as if to get the plugs hot enough) to get it to start. Do glowplugs wear out over time? Could this be his problem??

Jason
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Old 01-25-2007, 10:06 AM
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how cold is it there now
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Old 01-25-2007, 10:45 AM
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Could be a harness/connection issue as well. Gets pretty cold up here, and I don't plug in at night and mine fires up first shot, every time.

Gord.
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Old 01-25-2007, 11:38 AM
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It happens anytime the temp drops below 5o degrees. Plugging it in alliviates the problem, BTW, this is a friends truck, my 03 fires off first shot everytime and I don't have to go through this mess. He has to cycle it about 7 or 8 times and then when it fires off there's alot of white smoke (prolly just the cold causing that though). He says it just started doing it this winter....
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Old 01-25-2007, 11:42 AM
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cycling the ignition switch doesnt do any good ,the light and actual glow plug on time are two different things ,alot of people dont know that , the light only stays on for 10 seconds , the glow plug relay controlled by the pcm can stay on for up to 90 seconds even though light is off ,glow plugs generally dont go bad in 99 -03 models mostly just the relay
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Old 01-25-2007, 11:46 AM
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Well, there are many posts on here about diagnosing glow-plug problems. One thing that can happen is that the glow-plugs don't necessarily "wear-out" but they get covered with carbon on the ends. When carbon gets built up too thick it limits the amount of heat that is disappated from the plug and therefore it's not as effective. If you remove a glow-plug and it won't come out of the hole due to carbon build up, don't force it, soak it with penetrating oil and dissolve the carbon.
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Old 01-25-2007, 01:55 PM
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Quote:
Originally Posted by scott whisenhunt View Post
cycling the ignition switch doesnt do any good ,the light and actual glow plug on time are two different things ,alot of people dont know that , the light only stays on for 10 seconds , the glow plug relay controlled by the pcm can stay on for up to 90 seconds even though light is off ,glow plugs generally dont go bad in 99 -03 models mostly just the relay
If that's true than how is it that when my trucks just been turned off and I start it back the light goes off quickly?
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Old 01-25-2007, 02:11 PM
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Quote:
Originally Posted by scott whisenhunt View Post
cycling the ignition switch doesnt do any good ,the light and actual glow plug on time are two different things ,alot of people dont know that , the light only stays on for 10 seconds , the glow plug relay controlled by the pcm can stay on for up to 90 seconds even though light is off ,glow plugs generally dont go bad in 99 -03 models mostly just the relay
My 99 glow plugs went bad 2 years ago.
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Old 01-25-2007, 02:14 PM
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The light is also related to fuel pressure needed to start if the fuel is there it is not on as long
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Old 01-25-2007, 05:00 PM
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I heard pouring some Seafoam in the filter bowl will clean out the carbon on the glowplugs, along with giving the injectors a cleaning.

Dumping some in the tank will probably give the same result over the course of the whole tank of fuel.
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