Surging when hot and under load

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May 29, 2005 | 09:05 PM

jimtx

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Surging when hot and under load

I own a 2002 crew cab 4x4 powerstroke 70,000 miles stock. While towing 12,000 lb horse trailer at 60 to 65 mph going up a small grade, I put my foot in the throttle. The motor started surging like the transmission was shifting back and forth even though I was picking up speed. It did this 6 or 7 times until i let off the throttle Any Ideas ? It will be hard to replicate it for the service tech.

Thanks in advance
Jim

May 30, 2005 | 08:37 AM

IB Tim

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From: 3rd Rock

Is this a 6.0 or 7.3 engine?

May 30, 2005 | 08:42 AM

kw5413

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From: Great State of Texas

Long night Tim?...an '02 PSD would have to be a 7.3 wouldn't it?

May 30, 2005 | 08:49 AM

IB Tim

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From: 3rd Rock

Kind of figured that....hehe

MOVED and member notified

May 30, 2005 | 09:39 AM

Kwikkordead

Fleet Owner

Joined: Jun 2004

Posts: 25,090

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From: Rio Rico, AZ.

Quote:

Originally Posted by jimtx

Hmmm. Could you go into a little more detail? Auto or manual? When was the air and fuel filter last changed? Fuel level in the tank at the time? % of grade? 4%? 5%? 6%?
There'll be lot's of people chiming in with good ideas, but without a lot of good information about your truck it's mostly guess work.

May 30, 2005 | 11:08 AM

jimtx

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Hi Kwik,

Its an auto transmission, filters changed 3000 miles ago, tank 3/4 full 2% grade, trailer was around 10,000 lbs

May 30, 2005 | 12:34 PM

Kwikkordead

Fleet Owner

Joined: Jun 2004

Posts: 25,090

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From: Rio Rico, AZ.

Did you also get a sound coming from the intake like a fluttering tornado?

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May 30, 2005 | 02:03 PM

Fire Rooster

Posting Guru

Joined: Feb 2004

Posts: 1,873

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From: Phx, AZ

fan clutch engaging in and out, normal, will do it at a lower speed if you lock out the O/D. then goes away once you reach the top of the hill etc? Sounds like the fan clutch, no big deal.