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GLOW PLUG's unknown potential...

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Old Dec 11, 2007 | 01:42 AM
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GLOW PLUG's unknown potential...

I'd like to leave a note here, about how the glow plugs are working on my 2002 7.3.

When its -20, i've been waiting for the light to go out, and start cranking.
After hearing a story, about some dodge guy leaving his plugs on for 15 minutes, i thought i'd leave the key in the run position for a full minute and see what happens...

Guess what, the truck started like it was summer!

I cant remember reading or hearing anywhere that the plugs stay on after the light, although i knew that they cycled after starting, but i thought the engine would have to be running to initiate that.....

Is this just me, or is this just the way it is?
 
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Old Dec 11, 2007 | 01:59 AM
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They stay on for about two minutes, running or not.
 
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Old Dec 11, 2007 | 02:16 AM
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I think theres a lot of people who dont realize this...
 
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Old Dec 11, 2007 | 03:10 AM
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this why a few guy's have added a second wait to start light..

https://www.ford-trucks.com/forums/6...cator-led.html
 
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Old Dec 11, 2007 | 06:55 AM
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I added a LED to my pillar pod this weekend when I installed my gauges. You'd be surprised at how your GP's actually work. Apparently the WTS light is just set-up on a timer no matter what the conditions it does the same thing everytime. Your GPR is definitely not set-up this way, once the temp is warm enough or your motor is warm enough, the GP's don't even come on, but your WTS light does. That little LED taught me allot.
 
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Old Dec 11, 2007 | 12:04 PM
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You can also tell when the GPR kicks off by a digital volt meter . When the voltage (usual runs around 10 - 11 volts) jumps up to about 13 -14 volts after a couple of minutes from a cold start is when your gpr kicks off.. I have digital voltage meter on bought on the internet that just plugs into the cigerette lighter..Here is a source link:
http://www.cetsolar.com/voltmeter.htm
I just leave it plugged in all the time.. it does not draw any current to worry about..
 

Last edited by clintbonnie; Dec 11, 2007 at 12:07 PM.
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Old Dec 11, 2007 | 01:27 PM
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If you have a good set of ears, and you're parked in a quiet spot, you can hear your relay click off. It makes a very faint buzzing sound.


On cold starts I listen for the relay to stop buzzing before I crank her over.
 
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Old Dec 11, 2007 | 01:43 PM
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Mine doesn't buzz, at least not louder than the fuel pump. I am planning on that handy-dandy LED, though -- that was a really good idea!! Who came up with this originally?? Whoever it was -- thanks!!
 
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Old Dec 11, 2007 | 01:44 PM
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Yeah,the glow plugs can run upto 2 minutes or so, the hotter they get the easier the engine starts.

btw, the dodges don't even have glowplugs, just an intake grid heater
 
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Old Dec 11, 2007 | 01:51 PM
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WMRiceman started the thread i posted..i take it he was the first...my truck is parked in my shop and i never hear a buzz ether....
 
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Old Dec 11, 2007 | 01:59 PM
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Originally Posted by Lead Head
btw, the dodges don't even have glowplugs, just an intake grid heater
that's all about all diesels had for years,you can have it also just wire your intake heater relay with the glowplug relay
 
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Old Dec 11, 2007 | 02:01 PM
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Thanks, Ron. I remember that thread now that you say that... If you DO hear a buzz, keep an eye on it -- it could be on its way out. Of course, it may buzz for years without failing, too. I've seen (okay, HEARD) relays like that before that never failed for all I know.
 
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Old Dec 11, 2007 | 02:03 PM
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I can hear the buzz, but it's hard to hear. the light is much easier and you don't sit there with that goofy, I've gotta go to the bathroom look! j/k
 
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Old Dec 11, 2007 | 02:30 PM
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Hmmm, buzzing sounds more like a fuel pump running to me.
Are you sure that you are not hearing the pump instead?
 
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Old Dec 11, 2007 | 02:52 PM
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Originally Posted by ron's power stoke
WMRiceman started the thread i posted..i take it he was the first...my truck is parked in my shop and i never hear a buzz ether....
I had already done this on my Dad's truck (1990) when I was fighting his glow-plug situation and had to install a manual push button for him. It was what I used as the ON indicator for him.

I am real curious about just how much the plugs are used on my truck compared to others. It's hot 99.9% if the time here where I live. I know when changing/testing the GPR, it would energize momentarily, but I wouldn't be surprised if that's all.

I am going to have to do this as I am in need of another project. AFFORDABLE one too, due to XMAS .

happy holidays!
 
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