Changed spark plugs = MISFIRE
#1
Changed spark plugs = MISFIRE
Okay here's the story, I changed my plugs this weekend, those were still the original ones, with 53k on em, I changed the old ones (AGSF-24N-6H) by the ones the dealer sold me (AGSF-24N-8G). Note that I also removed that.... silencer thing in the airbox at the same time.
The truck was running fine before, but now i get occasionnal misfires, sometimes it's worse, sometimes I can barely feel it. At some point it was so horrible, the CEL was blinking.
I think it could be 3 or 4 things....
-these are'nt the right plugs (6H/8G)
-the gap is too great (Note that I assumed it was okay, I just compared with old ones, and to my eye, it looked correct)
-I didnt put ..... you know that grease that I'm suppose to put on the connection wire/plug
-Could it be linked to the silencer that I removed ?? (that one is less probable)
What are your toughts guys ! It gets really annoying.
The truck was running fine before, but now i get occasionnal misfires, sometimes it's worse, sometimes I can barely feel it. At some point it was so horrible, the CEL was blinking.
I think it could be 3 or 4 things....
-these are'nt the right plugs (6H/8G)
-the gap is too great (Note that I assumed it was okay, I just compared with old ones, and to my eye, it looked correct)
-I didnt put ..... you know that grease that I'm suppose to put on the connection wire/plug
-Could it be linked to the silencer that I removed ?? (that one is less probable)
What are your toughts guys ! It gets really annoying.
#3
Well I compared real quick when i saw the number was different, but they looked exactly the same.
Note that the cel only blinked for....1 min, when it misfired so much ! I pulled over, let it idle for a moment while i was takin a look under the hood, got back on the road..... and the cel is off since that moment.
Note that the cel only blinked for....1 min, when it misfired so much ! I pulled over, let it idle for a moment while i was takin a look under the hood, got back on the road..... and the cel is off since that moment.
#5
#6
I replaced my stock plugs with E 3's and found that the #1 plug wire didn't seat to the plug. The plugs are the same length but the seat is higher on the E3 so the plug sits lower in the plug well. Hold them side by side and you'll see what I'm talking about. The boot wont go far enough down the well so I had to trim it down. Not what I wanted to do but it worked.
#7
#8
I'll have a look at this when I get some time thi weekend. But your problem with the E3s is'nt applying to my case, as I replaced them with motorcraft ones. I'm planning on taking them out, see what they look like, Gap them correctly (still need to know the right gap, and buy that gapping tool), put some stuff for the connection, then road test it ! Hope that solves it.
#9
#10
#11
I did them this year, 22,000 mile (29,000 miles now) because I felt a rough idle with the a/c and the lack of pick up too. They looked clean to me when I took them out but the electrode seemed to be worn down. I never seen what the looked like new but the electrode was real thin.
#13
#14
A thin center electrode means it's a Fine Wire Platinum plug. Rangers have come from the factory with FWPs for the past few years and now they are also the recommended replacement for several years before that.
#15
Thread
Thread Starter
Forum
Replies
Last Post
klc317
4.0L OHV & SOHC V6 Tech
14
05-15-2012 01:57 PM
dixie_boysles
4.0L OHV & SOHC V6 Tech
25
02-29-2012 04:21 PM