Hard cold starts...GPR? Or whats the proper way to heat GP's in cold? - Ford Powerstroke Diesel Forum
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Old 02-03-2011, 11:08 AM
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Hard cold starts...GPR? Or whats the proper way to heat GP's in cold?

I just bought this 7.3 F-250 a week or so ago and i think I know why the guy had it for sale

Anytime its about 25 or colder out the truck is a BEAR to get started (not plugged in) but it does start takes a few minutes. With very minimal diesel knowledge when I was looking at the truck it was plugged in ~20 degrees outside and it fired right up. I talked to the shop that always maintained the truck and he said glow plugs were put in about 3 years ago. I thought this thing would start a little better on it's own with newer glow plugs. Is it possible the GPR is going south? Also what is the "proper" way to heat up the glow plugs in the winter? Do you just keep the ignition on several minutes after the wait to start light goes out or do they quit heating up after the light goes out and you have to cycle the key?
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Old 02-03-2011, 11:17 AM
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The GPR could be going out yes. Someone with more expertise in that will have to help you.
You should always allow the GPs to heat a min. of 30-45 seconds (longer in some cases) in that kind of cold. Give that a try and see if your situation improves.
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Old 02-03-2011, 12:02 PM
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The GPs remain on for almost 2mins (when very cold) after the WTS goes out.

If you can, I'd be plugging it in when ever it's going to be real cold. Mine's on a Radio Shack Digital timer set to come on at 4 so it's ready by 7. The truck will start So Much easier and that's SO MUCH EASIER on your truck! Your Batteries, Starter, and engine will thank you.....

Here's All you need to know to diagnose and repair cold starting woes

Winter Operation, Hard Starting, Hissing Sound Etc...

Troubleshooting GPR & GP's
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