Slight miss after long highway run? - Ford Powerstroke Diesel Forum
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Old 11-19-2012, 04:16 PM
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Slight miss after long highway run?

This past weekend i went to IL to pick up a truck for a friend of mine, it was about a 5 hour trip one way. About half way in the trip we hit traffic and came to a stop. After about 2min of sitting there in traffic i noticed that the truck had a slight miss. I mean ever so slight but i could feel the truck kind of shake? or twitch. I had no CEL and no codes on my scan gauge. All my temps were in check EOT was 189* ECT was 193* running 70mph with an empty car hauler.

I shrugged it off to my mind playing trick on me. when we arrived at the guys house to get the truck i noticed the same thing again. but still no codes no loss of power or anything. No abnormal smoke on start up nothing...

Fast forward to driving to work last night i didnt notice it at all?

Thoughts?

Truck is stock, 4in exhaust, blue spring and that's it. T6 15w

im headed up 3 hours north for thanksgiving towing my buddies wheelin rig and thought i would see if there is something im missing or should be worried about before i go up

Sorry for the story book.. Thanks, Mike

EDIT: ON THE TRIP UP NORTH MY TEMPS WERE EOT 198* ECT 188* at 70mph FICM voltage has never dropped below 47v ever.

Last edited by 03XL6.0; 11-24-2012 at 07:46 AM.
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Old 11-20-2012, 05:21 PM
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i thought i noticed something similar after running 2 hours down the interstate at 70 with a loaded car hauler, around 7,000lbs. i pulled up to the fuel pump and was doing an idle cool down and i thought i felt something, but wasnt sure.
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Old 11-20-2012, 05:25 PM
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I did notice that mine was doing it today when I got home from work. But i don't know if its normal idle for these trucks or if I'm just bein over paranoid about it. Still no codes or loss of power.
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Old 11-20-2012, 05:47 PM
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Mine was doing that I changed my icp sensor and it went away.
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Old 11-20-2012, 06:21 PM
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Mine will do that from time to time. Mainly when after driving for a bit, then in a drive through and kill the motor to order and restart it will seem to have a miss for a minute or so then go away
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Old 11-21-2012, 03:23 PM
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Well I made the trip fine. Truck did great all temps checked out. But still had the miss after 3 hours on the highway. Sounded like the injector was racing almost? Had a really fast paced sound at idle. Shut the truck off and let it sit for 10min and fired it back up and sounds fine. WTF!
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Old 11-23-2012, 03:07 PM
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Update

So got back in town last night and had the issue all the home. But it got worse as the EGTs were gettin a little high even after I unhooked from the trailer just driving they were high.

So I changed the fuel filters tonight and holly crap they were terrible!!

Replaced them hoping it would change something but no change. I have a funny idle and what seems like a slight miss at idle after the truck gets up to temp. But now does it just driving around town.

I'm starting to think I messed up an injector.... But no codes... Help

Fuel filter pics

Last edited by 03XL6.0; 11-24-2012 at 07:08 AM.
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Old 11-23-2012, 07:44 PM
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*4 degree delta towing a hauler?

I'm jeleous!!
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Old 11-23-2012, 07:46 PM
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Quote:
Originally Posted by 03XL6.0 View Post
So got back in town last night and had the issue all the home. But it got worse as the EGTs were gettin a little high even after I unhooked from the trailer just driving they were high.

So I changed the fuel filters tonight and holly crap they were terrible!!

Replaced them hoping it would change something but no change. I have a funny idle and what seems like a slight miss at idle after the truck gets up to temp. But now does it just driving around town.

I'm starting to think I messed up an injector.... But no codes... Help

Fuel filter pics

Check the icp, ficm and egr valve..
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Old 11-24-2012, 06:49 AM
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When mine does this I usually change the fuel filters and it goes away. I got a bad batch of fuel recently and I've been changing filters every 2-3,000 miles. After changing them, I can hear the difference as soon as I crank up. Hope you get it figured out!
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