1999 struggle to start - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 01-14-2009, 08:32 AM Thread Starter
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1999 struggle to start

I have a 1999 F250 7.3 powerstroke with 160,000 miles. I have replaced glow plugs and checked power to them. Below 20 degrees F it struggles to start if not plugged in. Sometimes have to try several times. Hypertech code reader does not show any bad sencors. What could it be?
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post #2 of 4 Old 01-14-2009, 02:22 PM
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Could be the GPR. How long do you wait to crank- at least until the light goes out I hope? Below 20 you may want to wait a little longer to give the cyls more time to pre-heat, the GP's stay on for about 90 seconds (much longer than the light).
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97 F350 CCLB 4x4 PSD
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post #3 of 4 Old 01-14-2009, 02:30 PM
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I also had problems. Change my glowplugs with motorcraft glowplugs found brand new on ebay. Change the Glowplug relay, found on ebay also. Now it starts right up even when it was zero degrees outside one day. Used to have to plug in everday every winter. Now never. Try the glow plug relay

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post #4 of 4 Old 01-14-2009, 02:40 PM
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u could try cycling the gp's a couple times.... seems to help

1999 Powerstroke Diesel
K&N Intake, 4" downpipe to 7" Stacks, Edge Juice chip(with Attitude display), Bully Dog shift kit, X-wheel
352 HP
678 TQ (w/stacked EVO)
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