Maybe better to post a new thread. This one is 8 years old.

 

you might want to include more info, what you have; what initial problems were, what codes you had before, what codes you have now, etc. hard to venture any guesses without more info.

 

Sounds like you should probably change the spark plugs and the rubber boots on the ignition coils.
a shudder when passing to me sounds like misfires at an educated guess.

 

This issue concerns me. Mine is a 2004 and I've never changed the module. I'm wondering if I should? It's never had a fuel issue. I often go way up in the hills and far away from civilization so I try to prep for emergencies as much as I can. I try to think of the ONE thing that can fail and leave me stranded and keep a spare or work-around. Like a fuel pump... not easy to change when you're in Bigfoot's back yard, but it can be done by lifting the bed.

I was also wondering if a person can connect an EXTERNAL electric pump if you had to? Say - pop the lines at the fuel filter and plug it in there (make your own quick-connect hoses, etc.). Anyone tried this? I'm not sure if fuel can pass through your tank pump when it's not working. I did something similar on my boat engine, but it has a carb, not EFI.
I bolted an electric pump on the front of the engine and made a special hose to connect it from the carb to the tank. Cheap insurance and WAY cheaper than a new electric pump. Hopefully I'll never have to use it.

I suppose I could drop the spare tire and take a peek at my module. What exactly am I looking for as far as damage? Or just swap it regardless? Sounds like I should. Locally they want $105 for the Dorman 590-001, but Amazon has it for $52. My town of B.F.E. NOWHERE loves to jack parts through the roof! Maybe I'll order one anyway and keep on hand.

Here's the link to the module on Amazon. $52.13 (as of 6-24-21);

 

they are super easy and quick to change. Could you tube it, or just lower tire and look up above for it. Keeping new one under seat would be good idea. If you check around some have lifetime warranty some don’t (think Forman does not).

 

My truck is also a 2004 and it has what appears to be the original fpdm (no standoffs) I think it depends a lot on your climate (humidity and salty roads are going to attack it faster). You don't have to drop to spare to take a peek at it and see if it has the standoffs already just to remove it and work on it.
I think I'm going to ok install some plastic spacers and longer bolts to prolong it's life, maybe carry a cheap one as a spare in case it ever craps out.
If you want a cheap ford one of there era the crown vics of the same vintage used the same one but it is mounted inside the truck so it's not victim of corrosion and I assume could be had cheap from a pick n pull or eBay.

 

i agrees with all these points in theory. But for a part that can leave you dead on road (sometimes w/out warning) I think a spare is money well spent. New w/ Lifetime warranty replacement (at any Oreille In country) made it easy choice for me.