Compression Ignition Addict
Join Date: Apr 2012
Location: Stratford, Ontario
Thanked 136 Times in 120 Posts
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Disconnect your glow plug relay and your lights will still brighten up after that first minute or so... Completely negating the glowplugs from the situation I know I've done it.
There was a video I saw on YouTube that specifically showed the glowplugs cycling on and off, you could see the light smoke come and go. I think it may have been the infamous Bill Hewit, but that doesn't change what the truck was doing. (He was showing a "cold start".... In Georgia lol) but my truck does the same, I've tested it with a voltmeter. If it is still a question in 2 months I'll take a video myself.
In a non plugged in -25C cold start i would give the glowplugs about 30-40seconds to warm up then start the truck. After that they went on/off at intervals of about ten seconds, for about 4 minutes.
What the OP is seeing is totally normal as we both know, but it is NOT his glowplugs.
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