Glow plug clicking - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 27 (permalink) Old 02-12-2014, 11:37 AM Thread Starter
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Glow plug clicking

On my 93 IDI when I turn ignition on to warm up glow plugs there is a clicking for several seconds and then it stops so I start it up and runs just fine. Someone told me it shouldn't click like that, so is this normal?

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post #2 of 27 (permalink) Old 02-12-2014, 02:49 PM
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I had a '93 IDI and mine did not click. The glow plug relay goes on when you start the engine. When cold the Glow Plug Relay should stay on for about 30 seconds. As you loose glow plugs (dead ones) the relay will stay on for less time. Have you checked your glow plugs? Use a Volt /ohm meter and check each one. If they are open (very high ohms) they are bad. Use only Beru or Motorcraft glow plugs when replacing them.

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post #3 of 27 (permalink) Old 02-12-2014, 02:52 PM Thread Starter
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I turn ignition on wait till clicking stops and it starts right up very smooth and powerful running engine. So it can't b glow plugs. It starts good warm or cold.
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post #4 of 27 (permalink) Old 02-12-2014, 02:55 PM Thread Starter
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I pull a 3 ton chris craft barge very strong 7.3 never misses or a bunch of smoke and very good on fuel.
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post #5 of 27 (permalink) Old 02-12-2014, 03:54 PM
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As long as it starts in the cold, you are good to go.

Dave

2004 Ford F-350 Regular cab with 6.0.
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post #6 of 27 (permalink) Old 02-12-2014, 05:12 PM Thread Starter
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This f350 hauled chickens on a ranch here in east texas it's whole life. 180,000 miles
On him. It has set in a pasture for 3 years. I put fuel and new batteries and oil changes he fired up and I haven't did to much to him. The rancher has log on everything that was
Done to it since new. I asked the rancher how much he wanted for him he said 400.00 so I took it. But I have a/c issues, speedometer and tach problems, but I will get it, thanks
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post #7 of 27 (permalink) Old 02-12-2014, 05:58 PM
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For that price, you can afford to 'play' with it.

Dave

2004 Ford F-350 Regular cab with 6.0.
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post #8 of 27 (permalink) Old 02-21-2014, 10:28 PM
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From memory the mag switch is in the valley of the engine, get someone to activate the solinoid and you put a test light or voltmeter to the terminal that activates it. one small terminal will be a ground the other one activates the solinoid. check the ground, and tug test the wires, while testing, check the power is stable. The solinoid itself could be the problem as could the relay to it.
Just a thought!

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post #9 of 27 (permalink) Old 02-22-2014, 12:30 AM Thread Starter
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Johnp3, I'm not following about mag switch. ?
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post #10 of 27 (permalink) Old 02-22-2014, 01:56 AM
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There are 4 terminals on the mag switch two bigger ones, one of them has constant battery power, the other bigger one goes to the glow plugs.
The two smaller ones, one is ground you check that with an OHM meter to be sure it has a good ground anything above .1 is not great. The other small terminal comes from the glow plug switch that is what activates the mag switch. That is the terminal you test to be sure it has constant voltage. If it has constant voltage and the ground is good and the mag switch is intermittent then the mag switch is junk.
Just a thought!

1988 ford van fresh overhaul, 1991 nissan pick-up 1993 Caprice 2000 GMC S10 Blaser 2007 nbs 3500 GMC 4x4 crew-cab long box 17 inch single wheels Duramax Alison. BW turnover Ball. Furakawa FL35 loader. Retired, HD mechanic, worked on engines all my life. Fabricator welder. electrician. in the process of finishing my new shop. Live in Rock Creek B.C. Wife has a fruit stand.
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