View Poll Results: Lower mile plug change
It's not broken yet, just drive it
1
33.33%
Old plugs regardsless of miles, change ASAP then drive till there is an issue
1
33.33%
Old plugs change now and every 40k after
1
33.33%
Voters: 3. You may not vote on this poll
2004 with 52k, plug question?
08-26-2015, 06:51 AM
#1
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2004 with 52k, plug question?
Hey, I purchased a 2004 F150 with the beloved 5.4 and it's got 52k miles. Should I address the plugs now? It's running fine, no CEL etc. Do plugs wearout based on miles or age? Will older but low miles be as carbon fouled in general?
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Last edited by bigcanoe; 08-26-2015 at 06:56 AM.
08-26-2015, 07:14 AM
#2
Well they can get fouled at any age depending on other problems the engine might have had before you got it, and if you don't know if they've been changed before, it'd probably be easier to change them now than when you have 75,000-100,000mi on it.
08-26-2015, 07:37 AM
#3
I would change them now, I changed mine at 87,000 miles and I thought I was being proactive and still broke three plugs. Cylinders 1,6, and the dreaded #8 right underneath the dash by the steering column. If I could offer any advice I would say cut off a section of garden hose about 2-3 feet and tape it to a shop vac. The hose fits perfectly down the plug well and helps to get rid of any loose porcelain and left over penetrating fuel. Also, I would try and clean up the threads around the head to loosen any carbon deposits but DO NOT DROP ANYTHING INTO THE CYLINDER. It's not an entirely difficult process but does require some time, I would set aside at least 3-4 hours in case you break any. Remember, time is your friend...let the plugs soak in penetrating fluid and work them back and forth. You're definitely ahead of the game doing it now. Good luck!