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Old 03-21-2013, 06:02 AM
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Surging Cold Start

Past couple mornings I've been starting my truck to let her warm up before heading to work. I usually let her run for 10-15mins to warm up. The past mornings its been between 20*-28* around 0730-0830 and the truck seems to ramp up to High Idle within 2 mins of starting. However yesterday and today I've noticed while at Hi idle the truck starts surging and it seems to come and go until I tap the pedal to lower it down to normal Idle.
Not really sure if this is a big problem.

-2010 F350
-Just had the Fuel Filters changed

thanks.
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Old 03-21-2013, 06:41 AM
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Re: Surging Cold Start

Mine has done the same thing when its colder out. Its weird but mine usually does it before high idle then when it does high idle its fine.

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Old 03-21-2013, 06:54 AM
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Re: Surging Cold Start

My 6.0 did the same thing a couple weeks ago. Was around 10-15* and it was certainly strange, no plug in. Literally ran out to push the brake in and hasn't done it since. It was changing pitch all over the place like it was trying to do a vane sweep before oil got up to temp.
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