Random jerking at highway speeds...? - Ford Powerstroke Diesel Forum
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post #1 of 14 Old 04-22-2014, 06:57 PM Thread Starter
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Random jerking at highway speeds...?

I bought my truck about 5,000 miles ago and about 3 times now, it has had this random surging/jerking when I am cruising down the highway. It feels as though the RPMS are jumping by 25, then going down 25, etc... for about 1-2 minutes and then it goes away. Just enough to notice it really.

Any ideas as to a possible cause for this issue?
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post #2 of 14 Old 04-22-2014, 07:22 PM
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What year truck?

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2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
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post #3 of 14 Old 04-22-2014, 07:41 PM Thread Starter
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It's a 2001.
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post #4 of 14 Old 04-22-2014, 08:45 PM
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Where are you located? If youre in the Winona MN area I can run it through some tests with AE and check it out

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Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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post #5 of 14 Old 04-23-2014, 09:10 AM Thread Starter
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Aww man that is a shame. I went to college at Winona State but am now back in Green Bay.

Thanks though!
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post #6 of 14 Old 04-23-2014, 10:06 AM
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Where are you located? If youre in the Winona MN area I can run it through some tests with AE and check it out

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Damn Dave i never realized you were that close to me Every come down to to QC area?

Quote:
Originally Posted by winona78 View Post
I bought my truck about 5,000 miles ago and about 3 times now, it has had this random surging/jerking when I am cruising down the highway. It feels as though the RPMS are jumping by 25, then going down 25, etc... for about 1-2 minutes and then it goes away. Just enough to notice it really.

Any ideas as to a possible cause for this issue?
My OBS does this and im thinking its my TC slipping a bit but im not 100% it could be fuel pressure related. Any way to read your FP?

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Originally Posted by access_max View Post
With the issues fixed a 6.0 can run circles around a 7.3.
2000 F-350 7.3L ZF6
Standard 7.3 mods
SCT tuned
8" Fabtech lift 13" total
5:13 Gears
46" Goodyear MVTs Military takeoffs
Bushwacker Cut-Out Fender Flares
Ranch Hand front and rear bumper
On-board air W/Semi horns

1995 F-350 7.3L E4OD DRW
Standard 7.3 mods
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post #7 of 14 Old 04-23-2014, 11:50 AM Thread Starter
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I have a fuel pressure gauge installed but it is a the Glowshift one and doesn't work properly sometimes. I'll have to check next time the jerking happens.

Could the TC be a problem even if the 4x4 isn't engaged?

I had something similar happen to my 2002 trailblazer I used to own when I blew a transmission fluid line, but that jumped up and down 100-125RPM every half second. Not sure if the two could possibly be related.
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post #8 of 14 Old 04-23-2014, 12:03 PM
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Quote:
Originally Posted by winona78 View Post
I have a fuel pressure gauge installed but it is a the Glowshift one and doesn't work properly sometimes. I'll have to check next time the jerking happens.

Could the TC be a problem even if the 4x4 isn't engaged?

I had something similar happen to my 2002 trailblazer I used to own when I blew a transmission fluid line, but that jumped up and down 100-125RPM every half second. Not sure if the two could possibly be related.
TC as in Torque Converter, sorry for the confusion. But i would check fuel related issue before jumping to conclusions about the trans. Doubtful the issues are related. If you blew a trans line you would have trans fluid everywhere and the temp of the trans would shoot through the roof.

Local Jackass member Pat

Battle cry of every 6.0 owner out there
Quote:
Originally Posted by access_max View Post
With the issues fixed a 6.0 can run circles around a 7.3.
2000 F-350 7.3L ZF6
Standard 7.3 mods
SCT tuned
8" Fabtech lift 13" total
5:13 Gears
46" Goodyear MVTs Military takeoffs
Bushwacker Cut-Out Fender Flares
Ranch Hand front and rear bumper
On-board air W/Semi horns

1995 F-350 7.3L E4OD DRW
Standard 7.3 mods
PHP Hydra W/Tony Wildman tunes
160/0 Injectors
T-500 HPOP
E-fuel Conversion
West Coast mirrors
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post #9 of 14 Old 04-23-2014, 07:22 PM Thread Starter
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Quote:
Originally Posted by Rammstein1224 View Post
TC as in Torque Converter, sorry for the confusion. But i would check fuel related issue before jumping to conclusions about the trans. Doubtful the issues are related. If you blew a trans line you would have trans fluid everywhere and the temp of the trans would shoot through the roof.

Ah okay, thanks for letting me know.
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post #10 of 14 Old 04-23-2014, 07:36 PM
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Quote:
Originally Posted by Rammstein1224 View Post
Damn Dave i never realized you were that close to me Every come down to to QC area?



My OBS does this and im thinking its my TC slipping a bit but im not 100% it could be fuel pressure related. Any way to read your FP?
Once in a while yeah. I will message you next time I do

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Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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