Registered: May 2005
Location: Pinconning,Mi
Posts: 1323

2001 f150, had a tune up done, new plugs and new coil pack on clinder 3 and still runs bad, if it gets up to 45 mph and I let the rpm come down and then lighty accelerate the truck shakes, what could be wrong

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Steve Beson
Pinconning MI

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Registered: Jun 2003
Location: Washington, NC
Posts: 3315

Check your drive shaft u-joints.

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Registered: Aug 2009
Location: North Central, Mo
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Is the check engine light on?

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Registered: Sep 2005
Location: ohio
Posts: 764

Is it misfiring at all?You said you had a tune up done.But one of the plugs could be bad.Or if it is a 4x4 you front drive shafts could be going bad.

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Registered: Sep 2008
Location: Michigan
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I would just buy a Chevy!!

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Registered: Aug 2010
Location: guys mills ,pa
Posts: 2192

u joint if it shakes thru ur butt, through the steerin wheel check tie rod ends, cv-s etc. trust me, need more info though is it actually runnin smooth at an idle, and at speed. difference in shakes.

'Pr' branchville mtn banjo man

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Registered: Aug 2010
Location: guys mills ,pa
Posts: 2192

more info, motor shake, check the air filter, wont let enough air thru to the injectors to run right. fuel filter, missin. go to a advanced auto or somewhere where they will put on computer for free and have it checked. could be a sensor.

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Registered: Aug 2010
Location: guys mills ,pa
Posts: 2192

quote:

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Originally posted by RRbluehound
2001 f150, had a tune up done, new plugs and new coil pack on clinder 3 and still runs bad, if it gets up to 45 mph and I let the rpm come down and then lighty accelerate the truck shakes, what could be wrong

---

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Registered: Aug 2010
Location: guys mills ,pa
Posts: 2192

quote:

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Originally posted by Aaron Hackenber
I would just buy a Chevy!!

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Registered: Dec 2004
Location: Harrison GA
Posts: 836

tune up man possibly put plug wires on wrong also need to replace distibutor cap. Have seen hair line cracks in them do exactly what your talking about

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Registered: May 2005
Location: Pinconning,Mi
Posts: 1323

had a new air filter put in, it is a 5.4 motor each clinder has its own coil pack, dont think that the wiring could be wrong, It only shakes 40 to 45 mph, I can feel it through the pedal, I almost think that the coil pack that was replace is bad also, but I called the mechanic back to look at it again, just hope it isnt something expensive to fix

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Steve Beson
Pinconning MI

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Registered: Nov 2008
Location: Pinckneyville, IL
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quote:

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Originally posted by Aaron Hackenber
I would just buy a Chevy!!

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Registered: Apr 2010
Location: afton tn
Posts: 52

rotate and balance tires can u feel in steering or just pedal

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Registered: May 2005
Location: Pinconning,Mi
Posts: 1323

tires should get balanced, but it only does it when rpms are low, and then accelerate and the motor doesnt feel as strong

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Steve Beson
Pinconning MI

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Registered: Apr 2009
Location:
Posts: 251

quote:
--------------------------------------------------------------------------------
Originally posted by Aaron Hackenber
I would just buy a Chevy!!
--------------------------------------------------------------------------------


For what so could have even more problems?

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Registered: Oct 2008
Location: Behind a scope and under the meat WV.
Posts: 222

did it shake before the tunup

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Registered: May 2005
Location: Pinconning,Mi
Posts: 1323

they truck ran fine than out of the blue was running ruff, took it to get a tune up, took it home, samething, brought it back, he said the computer said the coil pack on clinder 3 was bad, he change it and now it is still running bad

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Steve Beson
Pinconning MI

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Registered: Dec 2008
Location: S.W. Wisc.
Posts: 721

Water in fuel, Try a can or two of Heat.

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IF HE PAYS TO HAVE EVERYTHING REPLACED OR REPAIRED THAT YOU SUGGEST ON HERE HE MIGHT AS WELL JUNK IT AND BUT A NEW TRUCK OF HIS CHOICE.

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Registered: Sep 2008
Location: Poplar Bluff,MO
Posts: 128

Make sure the plug wires are snapped on good,had a 97 with a plug wire that felt like it snapped in place but it would vibrate back off .

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Registered: Mar 2010
Location: Lexington, IN
Posts: 272

I have the same truck and mine did the same it was the limited slip clutch in the rear end it's common in that year 97-03 have someone look under it when you put it in gear you will see the drive shaft will turn sevral turns before it grabs, rear end need rebuilt remeber tell the person looking not to lay under the truck they can see it without being under it lol. they realy aren't slipping like a tranny would they just have clutch chatter(vibration when deacceleration or vise versa)

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Allen Rosenbarger

Last edited by AllenR on 08-17-2010 at 10:57 PM

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Registered: Jun 2003
Location: Sylva, North Carolina (the far Western Tip of the State)
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COULD IT BE SOMETHING FUEL RELATED?

IS IT AN AUTOMATIC? COULD THE TRANNY BE SLIPPING? THAT COULD BE WHY IT GETS TO A CERTAIN SPEED/RPM IT SHUDDERS.

MAYBE YOUR TIMING IS OFF?

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Registered: Apr 2006
Location:
Posts: 6548

quote:

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Originally posted by AllenR
I have the same truck and mine did the same it was the limited slip clutch in the rear end it's common in that year 97-03 have someone look under it when you put it in gear you will see the drive shaft will turn sevral turns before it grabs, rear end need rebuilt remeber tell the person looking not to lay under the truck they can see it without being under it lol.

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Registered: Jul 2007
Location:
Posts: 3075

call me i have worked for ford for 29 years/ i will walk you through the repair. to try to get it resolved. the best advice on here was get a chevy so faar. yes i was a die hard ford man but the fact of the matter is aafter around 93-94 it has all been junk and i will not drive another until they do something about it. not tryinng to start anything just telling the truth/if you saw what i did day in and day out you would have the same opinion/anyone that needs help feel free to call 571-233-5819

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