New here with glow plug question
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Freshman User
Joined: Feb 2012
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New here with glow plug question
I recently got a 87 Ford f250 6.9 IDI. I've never had a ford but have had plenty of diesels, I'm mainly a cummins guy but couldn't pass up this truck. It only has 40k miles and is in very good condition. Anyway, I bypassed the glow pug system with a push button setup. I've read that you can burn up the plugs doing this and to only use them around 5 seconds at a time. I've done some searching and have gotten mixed messages. Any help appreciated.
Thanks
Thanks
Laughing Gas
Joined: Sep 2007
Posts: 869
Likes: 5
From: Near Shenandoah Valley
When I had this set up on an '85 I would hold the button around a count of 15. When you use the key switch your light times out in about 10-15 seconds I think, but the relay stays energizes 1 1/2-2 min.
Fleet Mechanic
Joined: Jan 2011
Posts: 1,709
Likes: 4
From: 8600 ft in Colo
No, they don't stay on for minutes. The wait to start light comes on with the plugs for 10-15 seconds, then the wait to start light goes out (at which point you should start it), and the controller cycles the plugs on & off for another few seconds to help keep it running. After that, they're off. Watch the volt meter, and you can see the voltage drop when the plugs are energized...
Posting Guru
Joined: Dec 2005
Posts: 1,528
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From: Peterborough, Ontario
Don't argue then. 10-15 seconds, then about 2 seconds on and 2 seconds off for 20-30 seconds after it starts to help it warm up a bit faster.
Anything longer than 10-15 seconds constant on will start burning out plugs.
Anything longer than 10-15 seconds constant on will start burning out plugs.
Fleet Mechanic
Joined: Jan 2011
Posts: 1,709
Likes: 4
From: 8600 ft in Colo
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New User
Joined: Feb 2011
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From: Seguin
Thinking back to my farm boy days...When the mercury was above freezing, I held the glow plug switch for a 10-second count before cranking. When it was below zero, a 15-second count usually did the trick.
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