Low speed loping, any input??
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Senior User
Joined: Mar 2006
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Low speed loping, any input??
Anyone else noticed this scenario?
I noticed it two nights ago and was able to recreate it again tongiht.
After driving a bit, (8-10 miles), I have to slow to 45 mph, drive 1 mile, then I have to slow to 30 mph for town then 1/2 mile for a stop sign. To slow from 45 to 30, I turn the tow/haul "on" tap break and Torqshift to slows to 30 mph. Once I am at 30 mph, I still have the tow/haul on and try and maitain same speed. While trying to hold it constant at 1750 rpm or 30 mph, this thing lopes lopes like a 60's muscle car waiting for its next red light. It shows approx. 100 rpm fluctuations on the tach. It idles fine when I get to to my stop sign. I can't seem to get it to do it (yet) when I start moving again.
Truck info - 04 f350 CC DRW short bed 3.73 32000 miles
Has latest program (cycle injectors for 30 before and after startup and shut down) I believe?
Truck is bone stock and has never been chipped or modded.
I am only driving the truck and not pulling anything when this is happening. Previous owner said something about this problem as well and only noticed it when pulling hard. Could be he never had tow/haul on to notice it in other cases?
I noticed it two nights ago and was able to recreate it again tongiht.
After driving a bit, (8-10 miles), I have to slow to 45 mph, drive 1 mile, then I have to slow to 30 mph for town then 1/2 mile for a stop sign. To slow from 45 to 30, I turn the tow/haul "on" tap break and Torqshift to slows to 30 mph. Once I am at 30 mph, I still have the tow/haul on and try and maitain same speed. While trying to hold it constant at 1750 rpm or 30 mph, this thing lopes lopes like a 60's muscle car waiting for its next red light. It shows approx. 100 rpm fluctuations on the tach. It idles fine when I get to to my stop sign. I can't seem to get it to do it (yet) when I start moving again.
Truck info - 04 f350 CC DRW short bed 3.73 32000 miles
Has latest program (cycle injectors for 30 before and after startup and shut down) I believe?
Truck is bone stock and has never been chipped or modded.
I am only driving the truck and not pulling anything when this is happening. Previous owner said something about this problem as well and only noticed it when pulling hard. Could be he never had tow/haul on to notice it in other cases?
Postmaster
Joined: Sep 2005
Posts: 2,725
Likes: 3
From: Florence,SC
you do not need to run tow haul with an empty truck. ford does not recomend this at all. do you have a early build engine? if so it could be the icp sensor shorting out due to the sensor starting to leak.
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Senior User
Joined: Mar 2006
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Build Date
3-31-04 I believe, Is this early?
What other symptoms result form the ICP sensor failing/leaking?
Oh by the way what is ICP? Still trying to get up to speed on the tech end of this engine.
What other symptoms result form the ICP sensor failing/leaking?
Oh by the way what is ICP? Still trying to get up to speed on the tech end of this engine.
Postmaster
Joined: Sep 2005
Posts: 2,725
Likes: 3
From: Florence,SC
no it is the late build. havent seen to many icp issues with these, but that doesnt mean it cant happen. icp is the injection control pressure-basically it tells the computer what the hpop is putting out.
Elder User
Joined: Nov 2005
Posts: 726
Likes: 1
might be your EBP ( Exhaust Back Pressure ) sensor. Our Excursion had the romp you described also and that was the cause.
I have also seen oil that has the anti foam agent beat out of it by the 6.0 do a similar thing. How many miles you have on your oil?
I have also seen oil that has the anti foam agent beat out of it by the 6.0 do a similar thing. How many miles you have on your oil?
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