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1998 F150 4.6 Missing Under Acceleration

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1998 F150 4.6 Missing Under Acceleration

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  #16  
Old 08-04-2018, 04:33 PM
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Clicking noises and missing could be loose spark plugs!
 
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  #17  
Old 08-04-2018, 05:18 PM
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Originally Posted by glc View Post
Clicking noises and missing could be loose spark plugs!
That's what I thought. We will not be driving the truck until I change out the plugs tomorrow, my grandfather doesn't have to work until Sunday I think. This time, I'm replacing them with genuine Motorcraft Plugs, and torquing them down correctly. Also, the plug wires keep coming loose. Most likely caused by loose plugs, not sealing correctly in the well. Hopefully my woes will be over soon, then maybe this truck will last me to get my license.
 
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  #18  
Old 08-05-2018, 06:12 PM
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So, after breakfast, and some careful thinking, I started work on the plugs. Sure enough, plug 8, the one I noticed coming off more, was VERY loose. All 8 plugs were switched out with Motorcraft ones, and, not to my surprise, the truck runs like it's brand new from the factory. Thank you all for the help, now I have to wait for my hands to heal.
 
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  #19  
Old 08-05-2018, 06:52 PM
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Congratulations!
 
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  #20  
Old 08-05-2018, 08:29 PM
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Did you use a torque wrench?
 
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  #21  
Old 08-05-2018, 09:46 PM
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Originally Posted by glc View Post
Did you use a torque wrench?
Yep, torqued down to 28 ft lbs!
 
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  #22  
Old 08-06-2018, 10:39 AM
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Good job.
 
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  #23  
Old 08-08-2018, 09:22 PM
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Ok. So, plug wire number 7. My grandpa did that bank, I did the passenger bank. His plug, 7, the wire is popping off. Could lack of dielectric grease do that?
 
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  #24  
Old 08-08-2018, 11:49 PM
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Yes. Double check that the plug isn't loose, and look inside the boot to make sure the terminal hasn't spread open or gotten pushed back. Always use a small amount of dielectric grease in the boots.
 
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  #25  
Old 08-09-2018, 01:33 AM
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Originally Posted by glc View Post
Yes. Double check that the plug isn't loose, and look inside the boot to make sure the terminal hasn't spread open or gotten pushed back. Always use a small amount of dielectric grease in the boots.
OK, will check when I get the chance. Number 7 is the only one that has been having problems, otherwise the truck runs just fine. I really need to get this fixed soon, it needs to be smogged by the end of the month.
 

Last edited by Untrained; 08-09-2018 at 01:36 AM.
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  #26  
Old 08-09-2018, 09:53 PM
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Ok, when my grandpa got home I took off the wire, which was loose, took a microfiber cloth wrapped around a small screwdriver and wiped it out. Sure enough, all that was in there was a little bit of black gunk. I looked in the wire and everything seemed straight, so I put some grease in the boot and put it back on, making sure it was snug. So far, everything seems to be running good, I'll come back with any updates if anything happens again.
 
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  #27  
Old 08-09-2018, 10:50 PM
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I would pull the other wires, clean them out, and use some dielectric grease.
 
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  #28  
Old 08-10-2018, 02:40 PM
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Originally Posted by glc View Post
I would pull the other wires, clean them out, and use some dielectric grease.
I cleaned out the wires, put some dielectric grease, and it runs great. No more wires popping off after a mile or two. Put about 30 miles on it this morning, and nothing happened. Then I took it to get it smogged, and it passed. Thanks to everyone who helped me out!
 
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  #29  
Old 08-10-2018, 03:24 PM
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Good job!
 
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  #30  
Old 08-10-2018, 10:21 PM
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Nice to hear this!
 
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