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    Bulldoggers's Avatar
    Bulldoggers Posts: 1, Reputation: 1
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    #1

    May 11, 2012, 06:32 PM
    2005 Ford F-250 Diesel hard starting when cold?
    My pickup has a 5-10 second delay when starting cold. Once the pickup reaches running temperature, it starts normal. I changed the fuel filters about 7000 miles ago. I thought I might have a bad glow plug or a weak one, so I plugged the pickup in and it started normal. Then I had the pickup tested for bad or weak glow plugs and the computer indicated nothing wrong. Any help would be greatly appreciated.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    May 12, 2012, 05:41 AM
    . Remove and charge both batteries. Most auto parts stores will do this for free. Your F250 requires two strong batteries.

    . Use full synthetic 5W-40 heavy duty diesel engine oil. Diesel engines start much better with synthetics, plus they help save your battery, turbo, and starter motor. It makes a huge difference. Ensure the oil is up to the Full line, since it can affect fuel pressure.
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