5.4 problems

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May 25, 2008 | 09:59 AM

mstiles19

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From: the woodzies

5.4 problems

my engine isnt running right. It seems to be sputtering and running bad at low rpms and idle. When going at 50mph in overdrive the truck shakes reall bad but if its out of OD it runs better. I just cleaned my motor, what could i have gotten wet that i shouldnt have.

May 25, 2008 | 10:20 AM

78fordman

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From: Jefferson, Iowa

you probably got water underneith one or more of the cops. Have you changed your plugs yet? Take out all of the cops, replace the plugs if you havn't recently. Inspect all of the boots, make sure there are not any burn marks, if there are replace, if not wipe them down with some silicon spray and place back in the hole. Never wash under the hood of a triton with the cops, you will have this problem most of the time.

May 25, 2008 | 02:49 PM

mstiles19

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From: the woodzies

what are the cops? how do i get to em?

Thanks for the help!

May 25, 2008 | 03:11 PM

DAFBFD58

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From: Here and there

On top of each spark plug there is the coil pack. Instead of the rotor type system from the older trucks your's is computer controled. So each plug has a pack. You more then likely got water around the boot and its grounding to the block not the plug, hense your problem. Trust me on this. I had this problem when I washed mine and when I had to change the block temp sensor. I got coolant all over the place and half the plug holes were filled with it. It took a shot of compressed air into each hole to clean them out. Pull the coil packs, I think you will need a 5mm socket to take the screw out and either stuff rags in there or if you have and air source blow them out. Also don't forget to dry the coil pack boots and add a little of that junk you put on your sparkplug boots. Here are a few pics of what I am talking about. Here are the coil packs, bottom right of picture.

In this picture you can see the holes that are filled with coolant. Just to the out side of the intake ports. Its a picture from my sensor job. But you can see the round holes to the right side of the picture filled with coolant.

May 25, 2008 | 06:48 PM

mstiles19

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From: the woodzies

DAFBFD58, thanks! is it possible i messed up a coil? can i check them somehow?

May 25, 2008 | 09:14 PM

MohaveMike

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Joined: Apr 2008

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From: Oak Hills, Ca

A friend of mine had the same thing happen on his 5.4. Sounds like your motor is doing the same thing. He went through a rain puddle that was real long and deeper than he thought, check engine light came on, so I popped the hood, and sure enough there was evidence of water under the hood. plugged in an obd reader, and it read: cylinder six misfire. pulled the coil pack, and there was water sitting in the plug hole. The guys that have posted above me are right on. Good luck!