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  #16  
Old 02-14-2016, 10:36 AM
300sflyer 300sflyer is offline
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Ok so here we are almost a year later, and its acting up again in cold weather. -25C here last night. Obviously all the parts replaced last year did not solve the problem. The truck ran perfectly all summer. Bring some frigid temps back, and here we go again....

Tired of throwing parts at it, and hoping it is the right one!

Thanks for your thoughts!
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  #17  
Old 02-14-2016, 01:08 PM
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speakerfritz speakerfritz is offline
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Quote:
Originally Posted by 300sflyer View Post
Ok so here we are almost a year later, and its acting up again in cold weather. -25C here last night. Obviously all the parts replaced last year did not solve the problem. The truck ran perfectly all summer. Bring some frigid temps back, and here we go again....

Tired of throwing parts at it, and hoping it is the right one!

Thanks for your thoughts!
Cold weather start problems are basic spark, fuel or mechanical issues. My checklist would be

A. Is the oil 0w20
B. Is the battery delivering the right amount of amps
C. Is there water in the fuel filter that froze and is blocking fuel delivery.
D. Spark plugs could be a factor of never changed in 100k miles.

If the battery spins up the motor quickly get a spray bottle and skirt some fuel in the intake while someone else turns the key and if it starts for a few seconds my money is on water being froze in the fuel filter or lower fuel lines. Dry gas is your friend.
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Old 02-14-2016, 01:58 PM
300sflyer 300sflyer is offline
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Originally Posted by speakerfritz View Post
Cold weather start problems are basic spark, fuel or mechanical issues. My checklist would be

A. Is the oil 0w20
B. Is the battery delivering the right amount of amps
C. Is there water in the fuel filter that froze and is blocking fuel delivery.
D. Spark plugs could be a factor of never changed in 100k miles.

If the battery spins up the motor quickly get a spray bottle and skirt some fuel in the intake while someone else turns the key and if it starts for a few seconds my money is on water being froze in the fuel filter or lower fuel lines. Dry gas is your friend.
A B C D have all been checked. It will start up and continue running the first time its started. Its when you turn it off for a few minutes, and then try to restart the problem occurs. But ONLY when its very cold outside! As stated at the beginning of the thread, it turns over just fine, but wont fire the second time. Wait another 10-15 minutes, and it starts and runs fine again all day long.

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  #19  
Old 02-15-2016, 11:48 AM
300sflyer 300sflyer is offline
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Anyone else have any ideas? My local mechanic is baffled too. There are no codes stored when it happens. Of course it won't do it when he has it at his shop.... He suggested maybe taking it to the local Ford dealer. I dread the thought of that...
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  #20  
Old 02-22-2016, 01:46 AM
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Crank sensor could cause a no start condition, but usually it would do it every time.

You can hear the fuel pump priming? You checked fuel pressure?

Air, fuel spark.

If all those look good, the crank sensor is the only sensor I am aware of that would not allow you to start your truck up.
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  #21  
Old 01-06-2018, 10:10 AM
300sflyer 300sflyer is offline
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I know this thread is a few years old, but I'm still having issues.

Had to get a brand new battery this past week as it has been very cold, and I was having cranking issues. The new battery solved that.

Anyway, it was -28C here this morning and it fired right up. Moved the truck in the driveway to blow out the snow. Came back 10 minutes later to move it back, and it won't start. Cranks over perfectly, but will not run. Let it sit for 10 min, tried it again and it fires right up again...

The crank sensor was changed 2 years ago, so I'm still baffled by this intermittent problem! As stated before, it only acts up when its really cold.
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