Below 0F, Cold no start *sometimes* - Ford Powerstroke Diesel Forum
 
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post #1 of 3 Old 01-30-2014, 05:43 PM Thread Starter
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Angry Below 0F, Cold no start *sometimes*

I have an 06 PSD with 166k, bone stock, that's having issues starting in the cold but it is sort of intermittent. I drove it 4 days ago in 10 degree weather, started fine. Then yesterday morning when it was -8, it would crank and crank but doesn't fire until about 5 seconds in but still doesn't start. I end up cranking so much that the batteries start getting low.

My starting process in the cold goes -
key on, wait until glow plug light goes off, cycle key off then on and wait for glow plug light to go off again (i just read that this wasn't necessary), then crank.
On the day it was 10 degrees out, the truck started within 2 secs of cranking.

I don't know if i have the inductive heating flash since I'm the 2nd owner but I've checked a few things.
FICM voltage is 49V, Injection control pressure was at 1499 psi during cranking *or before cranking, don't remember now*
After it started, the icp went down to about 1000 or so.

One thing I noticed was that the battery voltage was at 12.9 before key went on, then it dropped to 11.6 while waiting for glow plug light to go off, stayed at 11.6v once the light went off. I heard a little buzzing also...could this be the injectors cycling?

Running 15w40 oil also if that matters.
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post #2 of 3 Old 01-30-2014, 05:59 PM
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Does it have a block heater? 15w-40 oil is like molasses at -8*.

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post #3 of 3 Old 01-30-2014, 06:14 PM Thread Starter
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Yes it does, but i'm not convinced it works. checked resistance between the two prongs to read ~15 ohms, left it plugged in for 4 hours and i didnt feel any heat anywhere on the engine. Stuck my hand up to touch the connector at the block but it was barely warm if at all.
Should I think about switching to 5w40 when it comes to the winter?
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cold start , ficm , icp

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