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post #1 of 3 Old 08-17-2013, 07:29 PM Thread Starter Rookie
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Winter tips for older diesel

I bought a 1999 F250 (7.3L) with 125k miles on it last summer, and had tons of starting issues last winter. Ended up replacing the glow plug relays, but even after that it was hit or miss when temps got below freezing. I found a way to keep it plugged in and all was good. However, I've moved from KY to NJ so expecting a much harsher winter, and as of now I don't know if plugging it in will be an option. I've just bought 2 new batteries so that will not be an issue. Is there anything else I can do to make starting in the cold less of an issue? This truck is not my daily vehicle and I know I'll have to drive it much more frequently in cold temps, but how frequent are we talking? Once, twice a week, or should I just start driving it every day? Are there any additives I can buy that might help? Thanks for the help!
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post #2 of 3 Old 08-18-2013, 06:16 AM
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First off NJ doesn't get THAT cold comparatively, it isn't Manitoba.

If you replaced the glow plug relay and it still was dicey below freezing than something else is wrong. I would check to make sure that relay didn't crap out, check the UVCH and ohm the glowplugs. At 14 years old it might be time for some new glowplugs. Are the injector o-rings original as well? They might be due to be changed at somepoint as well, especially if you already have the valve covers off for the glow plugs.

Synthetic oil or a diesel rated 10w30 will help but in balmy Jerz that isn't required IMHO. I live in Mass and with a stancor relay my truck would fire no problem with Wally World 15w40 even in near zero degree weather.

Some good links for you:
Winter Operation, Hard Starting, Hissing Sound Etc...

Troubleshooting GPR & GP's

Welcome to guzzle's Stancor GPR replacement Mod Web Page

2002 F-350 4X4 ECLB 7.3 4R100 6637 filter w/ RiffRaff cover, 08 diff cover, 203* T-stat, HPX, Stancor Relay, 6.0 trans cooler, Zone leveling kit, 8'6" Western Ultramount
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post #3 of 3 Old 08-18-2013, 05:43 PM
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It can get cold in NJ. Usually not for extended periods though and it depends on the location in the state as well. Good tips above and synthetic all the way.

1984 F-350 XLT 4x4 4spd. 6.9 (project)
1996 F-250 XLT 4x4 5spd. 7.3
2001 Excursion XLT 4x4 Auto 7.3
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