Calling all high mileage 5.4s...
#1
Calling all high mileage 5.4s...
Preferably more the 97-03s. There is an old thread on here about high mileage 5.4s without blowing plugs. I just wanted to start another more updated one.
I have 117,000 on my 2000 and haven't had a problem. I came VERY close. But no blow outs yet. Changed em twice so far!
let's go!
I have 117,000 on my 2000 and haven't had a problem. I came VERY close. But no blow outs yet. Changed em twice so far!
let's go!
#4
272,000 miles w/no problems. Once their broke loose, -disconnect the ratchet and spin them out w/the extension. Always installed or reinstalled plugs with a scrap piece of 3/8 air line. Spin down to snug, then 1/2-3/4 turn after seat. Directions were on the plug box (if you use iridium's). That turns out to be between 23-30 ft lbs. I did check that once, - honest
#5
Senior Member
#6
#7
152k on my '03 and no issues with blown plugs. When I had a low-grade misfire, found one plug that was finger-tight but it didn't blow out. Since then I followed jbrew's means & methods and went with the iridiums and runs better than I ever remember. Def. recommend the iridiums for the 2v 5.4's.
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#10
Hey I have a 99 Supercab 5.4- I'm at 188,350 miles, got my truck when it had 120,000 on it- It's been in the family since it had 1 mile on it so I know it's never had a plug blow out but i don't know if they've ever been changed- i get 11 miles a gallon and people tell me it's because i need new plugs- What are the iridiums you guys are talking about, what brand are they and should i buy them? Have been planning on changing them but don't know which ones to buy, seeing this thread finally got me to ask u guys about it- Any info you ugys could shoot over to me would be greatly appreciated- But yeah 188 and no blown plugs-
-Bruce
-Bruce
#13
You mean why would I choose a different plug than the original? Or why would I change them at all? (Sorry if that's a stupid question just needed to make sure exactly what you meant)
Really wanna change them because of the 10-11 miles/gallon
Really wanna change them because of the 10-11 miles/gallon