Engine Looping
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Freshman User
Joined: Jul 2005
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From: Yuma, AZ
Engine Looping
I have recently noticed that my engine is looping when I let of the gas and start coasting. It only happens when it is in overdrive and between 1600 to 2000 rpm’s. I am running a tune from a stock tune from DP-Tuner and a 4 inch turbo back exhaust. Truck seems to be running fine. I plugged my Tuner in and no codes were found (it is a SCT). Has anybody experienced this? Does anybody know what could be the cause?
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From: SoCal, SD CO. East
Are all of the vitals other than no thrown codes OK? Oil, coolant, air, fuel filters? Does it feel like maybe it's the converter having issues with free/lock conditions? Kinda' odd. I've got nuthin' but questions on this one. My truck has tow/haul, no OD so I've no frame of test reference either.
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Freshman User
Joined: Jul 2005
Posts: 34
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From: Yuma, AZ
I have the tow/haul. no codes. Just changed the fuel filters. The only thing that I can think is that the torc converter is locking up. Ford did a powerflush on my tranny and that is when this started. I did yank the cat of but I didn't notice any change's untill after the tranny flush.
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From: SoCal, SD CO. East
Originally Posted by birddogs462
It only happens when it is in overdrive and between 1600 to 2000 rpm’s.
Originally Posted by birddogs462
I have the tow/haul. no codes. Just changed the fuel filters. The only thing that I can think is that the torc converter is locking up. Ford did a powerflush on my tranny and that is when this started. I did yank the cat of but I didn't notice any change's untill after the tranny flush.
Last edited by OZX1; Mar 24, 2007 at 07:14 AM.
Cargo Master
Joined: Jan 2006
Posts: 3,009
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From: SE. MA
i have the occasional loping, but its only at idle and it has never happened while driving, its very intermitint so it doesnt really bother me. it only happens when im at a stop and the engine revs just jump a little? like maybe 100 rpm's or so? im not to worried about it, and i cant seem to pinpoint it on anything?
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Posting Guru
Joined: May 2004
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From: Northern Utah
slowmans, Sounds like a faulty ICP. I had a similar lope on my 03 which didn't really bother me for quite awhile until one day it was about 400-500 rpm lope. The dealer replaced the ICP and no more lope
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Joined: Dec 2004
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From: Weatherford Texas.
If you have the torqueshift you have over drive and tow/haul. overdrive is not selective when you put the tranny in (D) you are in overdrive. All tow/haul does is change the shift timing ,causes it to shift up later or down earlier. If you put the tranny in 3rd thats the gear you stay in no matter the speed, the same with all the other shift positions except (D).
Posting Guru
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From: Northern Utah
Originally Posted by birddogs462
what is a ICP?
Last edited by utahtom; Mar 24, 2007 at 06:55 PM.
Posting Guru
Joined: Mar 2006
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From: SoCal, SD CO. East
Originally Posted by slowmans
anyoneknow where the icp is on an 06?
http://dan.prxy.org/Truck/6L_bible_h.../Page_042.html
Senior User
Joined: Mar 2007
Posts: 127
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From: NE Ohio
This site rules! I have an 04' that has all of these symptoms. It started 6 months ago, so i unplugged the egr. It had never acted up again, until I had the batteries diconnected last weekend (installing gauges! ). I have read the battery installation file in this section, and I didn't hook my batteries up correctly. I'm heading out to the garage now to reconnect my batteries correctly. But I think it might be this ICP sensor.
). I have read the battery installation file in this section, and I didn't hook my batteries up correctly. I'm heading out to the garage now to reconnect my batteries correctly. But I think it might be this ICP sensor.