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Old 12-07-2008, 10:51 PM   #1 (permalink)
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Cold Start

My truck just does not want to start in the cold. I plugged my truck in this morning for about an hourit was about 20 degrees out i went to start it after being plugged in for an hour and the light took forever to go off. I took about 5 tries to finally get the truck to stay going. I went to work from 2-9 got in waited for the light to go off and started it. It would start and shut off. It did that 10 times. So the only way to get it to start was i had to give it throttle. It was about 20 degrees outside. I dont no what the deal is with it. Any advice
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Old 12-07-2008, 10:57 PM   #2 (permalink)
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i think your fuel filter or ur fuel is gelled up...most likly u have summer fuel in it yet..dosent take much....try that.
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Old 12-08-2008, 12:40 AM   #3 (permalink)
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Double check that BOTH grid heaters are functional. Mine was a real pig when only one was working, even when it wasnt very cold at all (-10c). Now with both working, it flashes right up @ -30c no problem. Easy test, just throw a multimeter on the wires at the manifold. cycle the key and check for voltage, then do the other one. dont cycle the key more than a couple of times without letting it sit for a minute or you could risk cooking the grid heaters.

Also make sure that the block heater is functional. Test it with a multimeter, should show resistance between the hot and neutral prongs and open from ground to either one.
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Old 12-08-2008, 07:31 AM   #4 (permalink)
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I have to give mine fuel to, with a 12v thats just the nature of the beast. Mine hates the cold it was 18* here yesterday and it sat for 7hours, slow to crank but it did. An hour on the plug doenst help mine to much it needs more than that. I plugged it in for 6hours the other night before, went out opened the hood and the block was warm to the touch she fired on almost a half a crank with alil fuel. For mine 3 hours seems to get it pretty warm.
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Old 12-08-2008, 09:03 AM   #5 (permalink)
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These things are all mechanical. NO computer to do the starting. Giving it a little pedal to start is NOT a problem. I do that all the time regardless of weather conditions because it starts instantly when I do.
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Old 12-08-2008, 12:25 PM   #6 (permalink)
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Originally Posted by Btp 2332 View Post
I have to give mine fuel to, with a 12v thats just the nature of the beast. Mine hates the cold it was 18* here yesterday and it sat for 7hours, slow to crank but it did. An hour on the plug doenst help mine to much it needs more than that. I plugged it in for 6hours the other night before, went out opened the hood and the block was warm to the touch she fired on almost a half a crank with alil fuel. For mine 3 hours seems to get it pretty warm.
I think you need to look into some thinner oil and/or figure out why it cranks so slow. Starting should not be a problem without the plug in that kind of weather.

Leaving the truck plugged in for only an hour isn't going to do much of anything to thin out thick oil IMHO, which sounds like what your problem is.

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These things are all mechanical. NO computer to do the starting. Giving it a little pedal to start is NOT a problem. I do that all the time regardless of weather conditions because it starts instantly when I do.
That's even what the sun visor even suggests so Chrysler/Cummins thinks it is normal operation. IMHO needing to give the truck a little pedal to start is normal.

I just finally plugged my truck in for the first time last night. We have had temps down to 0 degrees F already and it always fires right up. 5w-40 oil and a truck in good working order will not have any problems starting and running even without starting aids even at temps well below zero. My truck has sat for over a week before in -15 degree F weather without a block heater and fired right up and it sits for 8+ hours a day at work without being plugged in and has never had a problem starting even in -30 degree F (or even colder) weather.
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Old 12-08-2008, 01:00 PM   #7 (permalink)
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It doesnt matter how long you leave it plugged in the block heater is not going to do anything for the oil!

Its sitting in the pan well below the water jacket of the block, if you want to warm up the oil you will need to install another heater in or on the pan.
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Old 12-08-2008, 01:55 PM   #8 (permalink)
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It doesnt matter how long you leave it plugged in the block heater is not going to do anything for the oil!
I went around my truck on a nice even 0F day with an infrared temp gun after being plugged in for 8 hours. Engine hadn't been started for a couple of days.
Bottom of the oil pan was 40F
Top of the valve cover and intake horn were 74
Top radiator hose 112
Center of the steering wheel 24
The heated coolant actually circulates pretty well due to convection when the heater is plugged in.
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Old 12-08-2008, 01:58 PM   #9 (permalink)
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It doesnt matter how long you leave it plugged in the block heater is not going to do anything for the oil!

Its sitting in the pan well below the water jacket of the block, if you want to warm up the oil you will need to install another heater in or on the pan.
Yes it will.

The heater may not directly heat the oil, but the oil will most certainly be warmer due to the heater than it would be otherwise.
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Old 12-08-2008, 02:34 PM   #10 (permalink)
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Mondster I agree. You think that after draining the batteries so many times that there just not cranking to there fullest? I drive my 07 everyday so the 12 sits sometimes for a week at a time and the batts go dead I have to put them on a charger. Changed all the battary cables last year so there good. Also just got my alt rebuilt so its fresh.
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Old 12-08-2008, 02:51 PM   #11 (permalink)
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i guess when you are down south where you guys are it may heat the oil slightly from radiant heat from the block.... (because the block will heat up faster and get hotter)

But up here, it does nothing for the oil, especially if their is a breeze. My truck hasnt ran since the other day but its been plugged in the whole time and their is frost covering the entire block except for a small patch around the block heater. (ive been checking it as i suspected the heater was hooped but it was the plug)

Its only -36c right now, cant wait for the cold weather to come...

Got it pulled into the shop now to thaw out (e-brake is froze and when i went to pull it in the shop the door latch froze up and the door wouldnt close ). Going to be installing my oil heater and throwing the canvas belly bag on her. Took over 20sec to get oil pressure this morning with 5w40 synthetic, definately have to do something before she blows up!
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Old 12-08-2008, 06:34 PM   #12 (permalink)
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Mondster I agree. You think that after draining the batteries so many times that there just not cranking to there fullest? I drive my 07 everyday so the 12 sits sometimes for a week at a time and the batts go dead I have to put them on a charger. Changed all the battary cables last year so there good. Also just got my alt rebuilt so its fresh.
Your batts could be junk from the abuse they have seen. Starting batteries do not like to be left discharged for very long and if they are damage will occurr.

ykdave, it gets plenty cold here but not as cold as it sounds like it gets where you're at (we see -30 to -40 degrees F for a short period of time but see temps in the -15 to -20 degrees F regularly). Either way, even up here the oil will warm up enough that it will flow better than if the block heater was not being used. Worst case you could stick an oil heater in or on the pan to get it warm as well but for 99% of the US at least I don't feel it is necessary.

Last edited by mondtster; 12-08-2008 at 06:37 PM.
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