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Feb 18, 2010 | 07:04 PM

hammer65

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From: Morehead, Ky.

Need opinions on surging

Recently in 20 deg. weather, I have found it necessary to take off without letting engine warm up enough. Maybe a minute. At about 40 to 45 mph it started to surge. Never had done this before with 2 or 3 minute warm ups.
After a couple of miles it stops. Is this considered normal, or do I need to have something looked at.
Thanks to all who reply. Jim

Feb 18, 2010 | 07:15 PM

Kwikkordead

Fleet Owner

Joined: Jun 2004

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From: Rio Rico, AZ.

When was the last time you changed your oil?
These engines are very dependant on good clean oil for the injection system to function properly.

Feb 18, 2010 | 07:48 PM

DieselCamper01

Fleet Owner

Joined: Mar 2007

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From: BLT, MN

Any chance it's fuel related? Like a clogged fuel or air filter?

Feb 18, 2010 | 08:18 PM

bobpick

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Joined: Feb 2010

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From: Meta,Missouri

My 1999 7.3 is doing the same thing.Oil and fuel filter changed last week and still surging until it warms up.

Feb 19, 2010 | 01:16 AM

FreeDevin

Tuned

Joined: May 2008

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From: Pearl River, LA

Is the check engine light coming on? If so, do you have any codes?

Does the truck keep doing this after it warms up?

Describe the surging more. Do the RPM's climb with no pressure on the gas pedal?

Feb 19, 2010 | 05:24 AM

hammer65

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From: Morehead, Ky.

#1 2500 miles on the oil and Filter.
#2 Could be fuel filter.
#3 No check engine light. The surging came in at around 40 miles per hour, and lasted about a minute or two before going to steady rpm. I haven't noticed anything with my foot off the throttle.
I have noticed a slight surge for a few seconds when I start the engine cold and it then quickly smooths out. It will idle up to 1000 rpm while sitting and warming up. If I touch the brake it will idle back down to 6 or 700 rpm. Thanks guys Jim

Feb 19, 2010 | 06:22 AM

flatbeder

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From: Tonoph,AZ

Jim in colder conditions the truck will idle at 1000rpm to warm itself up. so no worries there mine does that her in AZ if it gets chilly enuff. when you are aproaching the 40 mph mark are you holding the accelerator pedal very lightly is that when the surging occurs? The reason I ask this is because I have the same problems at 40-45 mph. If I speed up the surge will sieze and it will run fine. I spoke with John Wood of John Wood automotive in CA about this problem thinking it could be the t/c. He said look towards the throttle pedal it could have a dead spot on the TPS. I would try to find someone with a AE plug it in and drive it alil and see if you got any codes! Plz keep us posted with any results, for you are not the only one on this forum having this problem it seems a few of us are in the same predicament as yourself.