How hard is it to change the coils in a 99 expedition and could someone tell me where the fuel filter is on this truck.Thanks

 

Fuel filters are usually located near the gas tank. You must depressurize the system before changing it. Coils are moderate work. With a vehicle that's higher off the ground usually it's handy to have a step-stool or small ladder to get up in under the hood for some of the work.

 

4.6 or 5.4?

Fuel filteris located on the drivers side frame rail midship/driver area (#8)... requires a release tool...

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Yeah. With the introduction of fuel injection (80's) came the introduction of a new tool. It's kind of a pain. Some toolboxes end up in the thousands-of-dollars range because they can't figure a simpler way. I wonder why they put the fuel filter in different spots (from the front all the way to the back). It's like they run out of space or (more likely) they can't make up their minds.