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    swimsrobert's Avatar
    swimsrobert Posts: 2, Reputation: 1
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    #1

    Jan 20, 2011, 06:56 PM
    2001 dodge ram 1500 5.9liter will not start if freezing outside
    All other times the truck starts and runs great. However if it reaches freezing or below it just won't start. I have cranked on it for 15-20 minutes before it begins to sound like it is going to start. Any ideas??
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Jan 20, 2011, 07:08 PM

    This link should help:

    https://www.askmehelpdesk.com/cars-t...ml#post1415281

    . Remove both batteries and fully charge. Most auto parts stores will do this for free.

    . Ensure the glow plugs work properly.

    . Change the fuel/water separator filter, if it hasn't been done recently. This link will provide additional insight on diesel fuel when the temperature drops:

    https://www.askmehelpdesk.com/cars-t...ml#post1985158

    . Use SAE 5W-40 full synthetic HDDO, since diesels are cold running beasts.

    . Install an engine block heater, if the problem persists.
    swimsrobert's Avatar
    swimsrobert Posts: 2, Reputation: 1
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    #3

    Jan 20, 2011, 11:08 PM
    This is a gasoline engine... after you get it started (if you do) it will run well and restart until it gets really cold again.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #4

    Jan 21, 2011, 07:11 AM

    Sorry, I assumed you had the 5.9L Cummins diesel, which I had been working on during the day with a Texas disaster response team.

    . Check/replace the Engine Coolant Temperature (ECT) Sensor, which affects fuel injector pulse width. The ECT Sensor is a temperature dependent resistor (thermistor), whose resistance decreases as the engine coolant temperature increases. It provides a richer mixture when cold, leaner mixture when hot. They become corroded, due to not changing the coolant frequently enough, flood the engine, and waste a tremendous amount of fuel.

    . Use SAE 5W-30 full synthetic engine oil (e.g. Mobil 1 or Pennzoil Platinum).
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