waiting for glow plugs? - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 10-12-2007, 03:12 AM Thread Starter
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waiting for glow plugs?

Is it mandatory to wait for the "wait to start" light to go out before you start these trucks? Mines a 2000 and it starts just fine rigth away. Can any damage be done?
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post #2 of 15 Old 10-12-2007, 03:19 AM
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Originally Posted by panteramatt View Post
Is it mandatory to wait for the "wait to start" light to go out before you start these trucks? Mines a 2000 and it starts just fine rigth away. Can any damage be done?

premature wear on the glowplugs. I would not get into the habbit of doing this. Because if you are in cold weather climant you could damage other things too.


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post #3 of 15 Old 10-12-2007, 03:45 AM
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Actually the wait to start light is not a part of the glow plug circuit like it is on other diesels. The light is controlled by the computer and the glow plugs continue to be on for a minute or two after the light goes out. You can watch you alternator gauge and see it jump up when the glow plug relay disengages. A lot of folks have installed a switch so they can manually disable the plugs in warm weather to save on wear and tear. The main reason I wait is to allow time for the fuel pump to build pressure.

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post #4 of 15 Old 10-12-2007, 03:52 AM
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Originally Posted by alabamafrog View Post
Actually the wait to start light is not a part of the glow plug circuit like it is on other diesels. The light is controlled by the computer and the glow plugs continue to be on for a minute or two after the light goes out. You can watch you alternator gauge and see it jump up when the glow plug relay disengages. A lot of folks have installed a switch so they can manually disable the plugs in warm weather to save on wear and tear. The main reason I wait is to allow time for the fuel pump to build pressure.
Your way would work how ever not every truck has a voltage meter. Some just have the idiot light like my 2002.


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post #5 of 15 Old 10-12-2007, 03:59 AM
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I didn't realize that it was all that long.

Maybe if it is a problem, you could switch to a gasser.

Of course I live in a desert, so maybe mine doesn't stayon as long as others. Anyway's I still let the beast warm up for at least a few minutes before I go.

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post #6 of 15 Old 10-12-2007, 04:03 AM
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If it is staying on for a long time you may have a bad controler or 1 or more glow plugs going bad creating the longer light?
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post #7 of 15 Old 10-12-2007, 04:21 AM
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The light ain't got nothing to do with the glow plugs.
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post #8 of 15 Old 10-12-2007, 07:14 AM
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Then why did they put it in there?
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post #9 of 15 Old 10-12-2007, 07:31 AM
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Marc told me and has posted in a thread somewhere I think that as long as the ambient temp is about 50 degrees F or higher, you do not "have" to wait for it to go off.
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post #10 of 15 Old 10-12-2007, 10:53 AM Thread Starter
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Thats what I figured. Does it hurt to start these up and then just go when its not cold? Im putting a remote start in soon so I can have it warm up a little.
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