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Feb 26, 2013 | 12:00 PM

#11

greenheadkiller98

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Joined: Sep 2011

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Mine did the same thing until a change the trans fluid and filter. Runs like a dream now

Feb 26, 2013 | 02:38 PM

#12

98ford5.4

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I just did the tranny fluid and filter I had the same thought as you but id like to be able to pin point the problem before I start throwing parts at it

Feb 26, 2013 | 02:47 PM

#13

98ford5.4

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Would the headers and cai cause this due to the change in air volume/flow?

Feb 26, 2013 | 04:28 PM

#14

greenheadkiller98

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Quote:

Originally Posted by 98ford5.4

Would the headers and cai cause this due to the change in air volume/flow?

Nah i highly hightly doubt it. If it aint the tranny its probably the coil packs

Feb 26, 2013 | 07:49 PM

#15

98ford5.4

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Ok finally got a cel its a front o2 sensor slow to respond and a lean code is this related at all?

Feb 26, 2013 | 07:53 PM

#16

MrMerica1776

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Joined: Jan 2013

Posts: 77

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From: Stillwater, Ok

Quote:

Originally Posted by 98ford5.4

I got a 98 5.4 and am haveing a shurging/vibrating/shaking problem when in od if im cruzing and give it any more thottle that what im cruzing at itl buck and surge all the way up to about 1/3 throttle then itl down shift and be smooth again it idles fine and accelerates fine just when gradually trying to speed up itl also vibrate at 80% throttle upon acceleration but if I let of a little bit itl stay at the same rpm but accelerate smoothly I am stumped
New motorcraft plugs no codes
I intalled a new motor and tranny about a month ago to the best of my ability (im only 17) but a local shop said it was all ok. Anyway its got a cai and longtube headers everuthing else is stock
I dont know if it air/fuel timeing or what?
Thanks for the help

I have a 00 5.4 and mine was doing the exact same thing for 3 days and about a week ago I had enough time(im 18 ) to check it out so I unplugged and checked the coils and what not till i found the one that was given me trouble the spring inside the rubber "boot" was all messed up so I wiped it down and shoved it back in there and good as new ever since. Idk if it wasn't making a good connection or what but it worked and I didn't have to spend any money on new coils hahaha. Or it might be like an air sensor or something too.

Edit: My bad haha didn't see that ya had it figured out

Last edited by MrMerica1776; Feb 26, 2013 at 07:55 PM.

Feb 26, 2013 | 09:42 PM

#17

jprevat

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Joined: Sep 2011

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From: South Carolina

Quote:

Originally Posted by khodgens

COP's don't always throw a code. Clean the tops of them. If any have a white thin line across the top it is bad, replace it. As previously stated clean real good and put a liberal amount of dielectric grease in the cap and reinstall.

What thin white line? I have had to change out a few coils and havent noticed this. Not saying it is there but I havent seen it.