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Feb 19, 2009 | 04:49 PM

Guitarpub

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From: Edna

info needed

I have a 2004 5.4 3v with 69000 miles that runs ruff at idle only. I have taken it to the dealer and was told that 1, 3, and 7 show weak spark. then advised to get new plugs. The question is could it be the coil packs and not the plugs or both.Also I have what seems like a slight slip when taking off only at start up and leaving my driveway. Any advise or sim. problems on this would greatly help me out

Feb 19, 2009 | 05:57 PM

WhëëlMå1

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From: MA

Welcome to FTE. Well spark plugs are cheaper than the COPs... so I would start there with a fresh set all around (if they have not been done recently). Are you talking about a drivetrain slip?

Feb 19, 2009 | 06:00 PM

Guitarpub

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From: Edna

Thats the thing its like a rear end slip but hard to tell " kinda like wet pavement ". It only does it one time when i first start up and leave my house after that its fine

Feb 19, 2009 | 06:02 PM

ggwash21

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x2 on the plugs, and on the slip. do you feel a small vibration with taking off? almost like hitting rumble strips or is it just a slip

Feb 19, 2009 | 06:06 PM

Guitarpub

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From: Edna

there is a slight vib long enough to feel then its like the tires caught dry pavement

Feb 19, 2009 | 06:29 PM

ggwash21

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yup i had the same issue, just had ford do a tsb that was for the limited slip in the rear end
Heres the post the vibration doesn't last long at all but long enough to know something it different.
https://www.ford-trucks.com/forums/8...vibration.html

Feb 19, 2009 | 06:31 PM

Catmonkey

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I'd check the fluid level in the transmission and make sure I'm not low on fluid. Have you ever changed the transmission fluid and filter? At 69k, you're past due for one. You might also want to check for codes.