2000 7.3 will not start unless plugged in - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 02-08-2014, 10:51 AM Thread Starter
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2000 7.3 will not start unless plugged in

My truck will not start (turns over) unless I plug it in for a couple hours. When it fails to start, it seems to be trying to run on less than 8 cylinders and produces white smoke. When plugged in, it starts and runs fine.

I replaced the gpr with a Stancor. I checked the glow plug resistance. All of the GPs have resistance between 1.8 and 2.0 ohms. Is that too much resistance? The connector outside the valve cover looks ok (not melted or discolored).

I would appreciate advice

Thanks Scott
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post #2 of 15 Old 02-08-2014, 11:49 AM
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Have you confirmed that the GPR is activating? That is, you have voltage on Both large terminals when they should be on?
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post #3 of 15 Old 02-08-2014, 01:14 PM Thread Starter
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Yes. After I installed it, I had 11.7 on the always hot side and a little less (11.5 v) on the other side when the key is on (zero when it is off). I couldn't get it started right after installing the gpr, so I plugged it up to Ac and put chargers on the batteries. The batteries were purchased a little over two years ago (11/2011).

Thanks
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post #4 of 15 Old 02-08-2014, 01:47 PM
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this sort of stuff is usually associated with bag glow plugs or relay but maybe your icp sensor is bad. pull the connector off the icp and if theres oil replace it.

99.5 f250 7.3 4x4 255k
PHP Phoenix, S&B, 4" Diamond Eye, Hpx, Stancor, RR Billet Wheel, RR AIH Delete, Autometer Gauges, Pro Comp leveled, Transgo Tugger, Billet TQ Converter, Warn Hubs, Int'l Up-Pipes, RR IC-Boots, Non-Ebpv Pedestal, High Flow Outlet, Hucorey's HPOP Lines, RR High Flow Fuel Fittings, RR OCR, Barder 360 Thrust Kit, 08 Tow Mirrors.

Dad-2000 7.3 108k miles, Autometer Gauges, Superchips 1705, RR AIH Delete, 6637, 4" Diamond Eye, BD Billet Wheel, TruCool Max
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post #5 of 15 Old 02-09-2014, 11:33 AM Thread Starter
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I pulled the icp connector off and inspected it - looks good, no oil. I am trying to eliminate what I can before replacing the glow plugs. Do you think I should test/inspect other things?

Also, are there any brands or places I should avoid when buying new GPs, valve cover gaskets or GP wire harness?

Thanks -Scott
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post #6 of 15 Old 02-09-2014, 11:46 AM
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motocraft plugs only.

motorcraft or interational injector harness only.

valve cover gaskets never wear out on these, occasionally one will get melted but thats pretty rare.

99.5 f250 7.3 4x4 255k
PHP Phoenix, S&B, 4" Diamond Eye, Hpx, Stancor, RR Billet Wheel, RR AIH Delete, Autometer Gauges, Pro Comp leveled, Transgo Tugger, Billet TQ Converter, Warn Hubs, Int'l Up-Pipes, RR IC-Boots, Non-Ebpv Pedestal, High Flow Outlet, Hucorey's HPOP Lines, RR High Flow Fuel Fittings, RR OCR, Barder 360 Thrust Kit, 08 Tow Mirrors.

Dad-2000 7.3 108k miles, Autometer Gauges, Superchips 1705, RR AIH Delete, 6637, 4" Diamond Eye, BD Billet Wheel, TruCool Max
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post #7 of 15 Old 02-09-2014, 11:58 AM
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Try actually unplugging the ICP and try to start it. Just because there is no oil in the sensor doesn't mean it isn't bad.

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post #8 of 15 Old 02-09-2014, 12:11 PM Thread Starter
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Ok. It starts with the icp plugged and unplugged. Unplugged gives a check engine light. Plugged icp back in and the light is out. (It is warm today, 60 - started without being plugged to AC)
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post #9 of 15 Old 02-09-2014, 12:13 PM Thread Starter
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Thanks, I'll stick to Motorcraft
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post #10 of 15 Old 02-09-2014, 12:17 PM
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unplugged will give a CEL, yes. But the next time it is cold and you are having problems, unplug it and give it a shot. If it starts up, you know to replace the ICP sensor.

2001 F250 ECLB 7.3 PSD 219,000 miles
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ISSPRO EV2 Boost, Pyro, Trans
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glow plug , glow plug relay , white smoke , will not start cold

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