Do glow plugs go bad?
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Senior User
Joined: Nov 2003
Posts: 224
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From: Trophy Club Texas
Do glow plugs go bad?
Recently it seemed to me that my glow plug light took longer to go out than it used to. Hadn't ever timed it, but just seemed to take more time.
Today I did time it. Took 9 seconds at 57 degrees with rain.
Is that about right?
Stock 2005 F250/6.0 with 31k miles
I'm not yet worried about it, just seems like a long time to me.
Thanks
dp
Today I did time it. Took 9 seconds at 57 degrees with rain.
Is that about right?
Stock 2005 F250/6.0 with 31k miles
I'm not yet worried about it, just seems like a long time to me.
Thanks
dp
Cargo Master
Joined: May 2006
Posts: 2,116
Likes: 6
From: Florida
Originally Posted by dlpinkc
Recently it seemed to me that my glow plug light took longer to go out than it used to. Hadn't ever timed it, but just seemed to take more time.
Today I did time it. Took 9 seconds at 57 degrees with rain.
Is that about right?
Stock 2005 F250/6.0 with 31k miles
I'm not yet worried about it, just seems like a long time to me.
Thanks
dp
Today I did time it. Took 9 seconds at 57 degrees with rain.
Is that about right?
Stock 2005 F250/6.0 with 31k miles
I'm not yet worried about it, just seems like a long time to me.
Thanks
dp
but to answer your topic, yes they do.
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
I'm not sure how the glowplug timer is controlled, but mine is longer on colder days also. It's also been longer with the inductive heating flash, although I'm not sure that they're at all related.
Here's how to test a bank at a time: http://dan.prxy.org/Truck/6L_bible_h.../Page_068.html
and a little more about the system operation:
http://dan.prxy.org/Truck/6L_bible_h.../Page_066.html
The PCM will give a code for bad glow plugs according to this.
Here's how to test a bank at a time: http://dan.prxy.org/Truck/6L_bible_h.../Page_068.html
and a little more about the system operation:
http://dan.prxy.org/Truck/6L_bible_h.../Page_066.html
The PCM will give a code for bad glow plugs according to this.
Posting Guru
Joined: Jul 2007
Posts: 1,233
Likes: 0
From: Las Vega$
in short. glowplugs can and do go bad.
also, like was mentioned: the "wait to start" indicator light has nothing to do with how long the glow plugs are energized. they can stay energized up to 2 minutes AFTER the vehicle has been started.
also, like was mentioned: the "wait to start" indicator light has nothing to do with how long the glow plugs are energized. they can stay energized up to 2 minutes AFTER the vehicle has been started.
Laughing Gas
Joined: Nov 2006
Posts: 909
Likes: 0
Originally Posted by npccpartsman
I'm not sure how the glowplug timer is controlled.
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