Plugs and wires 01 Expedition 5.4
#1
Plugs and wires 01 Expedition 5.4
Hi friends.
Searching forums but no good answers.
Bought this recently and it's missing so I'm going to replace plugs and wires.
Can you recommend some great plugs and wires?
Why do you like them?
Motorcraft iridiums?
Worried about breaking one off so going to spray some liquid wrench in there and let em soak.
Any tips and tricks? Some dielectric grease for the tips and anti seize for the threads?
Would love guidance for this first go around.
Hope you all are doing well. We deserve the best.
Appreciate any help and guidance.
Andrew
Searching forums but no good answers.
Bought this recently and it's missing so I'm going to replace plugs and wires.
Can you recommend some great plugs and wires?
Why do you like them?
Motorcraft iridiums?
Worried about breaking one off so going to spray some liquid wrench in there and let em soak.
Any tips and tricks? Some dielectric grease for the tips and anti seize for the threads?
Would love guidance for this first go around.
Hope you all are doing well. We deserve the best.
Appreciate any help and guidance.
Andrew
#2
Motorcraft platinum plugs. Skip all the gimmick crap.
The 5.4 doesn't have plug wires, it's a coil-on-plug (COP) arrangement. Plan on a replacement boot/spring for each cylinder. You'll probably find you need one or two COPs, so it's usually best to troubleshoot the misfire BEFORE taking the rest of the stuff apart. Too often, the misfire is caused by the coil itself any there's no point in not addressing it first. No, do not replace all 8 COPS, it's a silly waste of money done by those who cannot troubleshoot.
The 5.4 doesn't have plug wires, it's a coil-on-plug (COP) arrangement. Plan on a replacement boot/spring for each cylinder. You'll probably find you need one or two COPs, so it's usually best to troubleshoot the misfire BEFORE taking the rest of the stuff apart. Too often, the misfire is caused by the coil itself any there's no point in not addressing it first. No, do not replace all 8 COPS, it's a silly waste of money done by those who cannot troubleshoot.
#3
When I replace shocks, I replace them at least in pairs. When I replace wheel bearings, I do them in pairs. Brake pads.... again, in pairs (sets really). Tires..... you'll never guess....
#4
I'll have a couple coil packs at the ready. Don't really want to shell out for 8 if I don't have to. Might just do the 2 in the back to get started.
Best way to troubleshoot? Not seeing any obd codes but surely it's missing and my pre purchase inspection mentioned it.
However it's been awhile since I've done a scan.
Long day. Knew I had coil packs.
So how would you diagnose?
New to the Expedition. Explorers were my thing but couldn't pass up the deal.
Thanks.
Best way to troubleshoot? Not seeing any obd codes but surely it's missing and my pre purchase inspection mentioned it.
However it's been awhile since I've done a scan.
Long day. Knew I had coil packs.
So how would you diagnose?
New to the Expedition. Explorers were my thing but couldn't pass up the deal.
Thanks.
#5
Or by those that figure if a couple are bad, then others can't be far behind.
Using such faulty logic, if you had to have a root canal, you'd do them all because the rest must obviously not be far behind.
Shocks, bearings, tires, and brake pads are all wear items, their replacement is expected when they wear out. Replacing them in sets, especially tires, shocks and pads, is done to try and ensure that performance and remaining life remains balanced. Coils are not wear items (they're not expected to "wear out" from normal use) although the plugs are. Hey, it's your money, feel free to spend it as you choose to.
Best way to troubleshoot? Not seeing any obd codes but surely it's missing and my pre purchase inspection mentioned it.
Until the misfire rate exceeds a calibrated threshold, the PCM will not post a DTC or turn on the MIL. Such low-grade misfires can only be effectively troubleshot by digging into the computer's data. Ineffectively, by either guessing or just shotgunning it.
#6
Go with the OEM plugs. Since they're good for 100K miles there's a pretty good chance you'll never change them again. Trust me, after changing the plugs one time you'll do almost anything to not have to do them again.
#7
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#8
#9
If you've got a code thrown, yes.
If the coil is still firing but it's not getting cleanly to the spark plug, will not show up as a misfire- because the coil is still firing. New boots may fix the issue- the plugwell may be filled with oil from a leaky valve cover gasket (or water from a recent engine wash).
If the coil is still firing but it's not getting cleanly to the spark plug, will not show up as a misfire- because the coil is still firing. New boots may fix the issue- the plugwell may be filled with oil from a leaky valve cover gasket (or water from a recent engine wash).
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