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V10 engine running rough

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Old Sep 28, 2019 | 11:53 AM
  #31  
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Well then you should be good. The first thing I do when I get a new vehicle is a tune up just because I dont know when it was done. Mine had a thread repair in a cylinder that had worked itself loose. Now I'm back to firing on all 10 cylinders and it runs way better
 
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Old Sep 28, 2019 | 09:18 PM
  #32  
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Boots arrived today, several days ahead of schedule. Looks like I get to start on it in the morning.
 
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Old Sep 28, 2019 | 09:22 PM
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Good luck! Do 5 first and work towards the front on the passenger side. Then do 10 and work towards the front on the drivers side. Itll make you feel better doing the hard ones first. And if you have a ladder, for the love of all things holy, make a topside creeper with it! I have never been so comfortable working on a truck!
 
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Old Sep 29, 2019 | 10:19 AM
  #34  
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Easy part done, 5 coils removed from passenger side. Though dirty, I have not found anything suspicious yet.


 
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Old Sep 29, 2019 | 10:23 AM
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Did you use an air compressor to blow the dirt of the holes before you pull the plugs? There is usually a bunch of crap in there. At least it looks like you have all motorcraft coils so that's a positive!
 
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Old Sep 29, 2019 | 10:33 AM
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#1 plug
 
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Old Sep 29, 2019 | 10:34 AM
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Damn! You were overdue for a change!
 
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Old Sep 29, 2019 | 10:43 AM
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Originally Posted by afmedic
Did you use an air compressor to blow the dirt of the holes before you pull the plugs? There is usually a bunch of crap in there. At least it looks like you have all motorcraft coils so that's a positive!
Yes, going to do 1 hole at a time so as not to blow crap into and contaminate the others. Hardly anything came out of #1 though.

What is the recommended gap? New plugs are at 0.053 already.

Old plug is at 0.089 :-p

 
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Old Sep 29, 2019 | 10:50 AM
  #39  
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That's perfect. I believe it is .050 to .055
 
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Old Sep 29, 2019 | 11:04 AM
  #40  
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New Denso coil measures about 1.0 ohms, the #1 coil measures about 1.5 ohms. Old boots and spri gs look good, flexible, but as I have new ones, might as well use them.
 
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Old Sep 29, 2019 | 12:17 PM
  #41  
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It's always a good idea to do the boots with the plugs. Sometimes the issue isnt visible. If the wall of the boot is deteriorated or thinned in an area, itll allow the spark to arc to the cylinder head and reduce the amount of spark at the plug causing a misfire or rougher running. Sounds like you're getting it licked hopefully it solves your problem!
 
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Old Sep 29, 2019 | 12:24 PM
  #42  
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Thinking these plugs could be the cause of the rough running. Passenger side done. Off to the drivers side.

 
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Old Sep 29, 2019 | 02:33 PM
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Drivers side plugs were just as bad. Replaced them the boots and springs. It runs smooth at idle, but starts shaking under load.

I have 2 new coils. Guess I'm going to change them out 2 at a time and see if I can find a bad one. If not, I'm not sure what to do next.
 
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Old Sep 29, 2019 | 02:58 PM
  #44  
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Originally Posted by ShelbyHauler
Drivers side plugs were just as bad. Replaced them the boots and springs. It runs smooth at idle, but starts shaking under load.

I have 2 new coils. Guess I'm going to change them out 2 at a time and see if I can find a bad one. If not, I'm not sure what to do next.
Found it, #10 coil. Running strong and smooth under load again.
 
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Old Sep 29, 2019 | 03:04 PM
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Awesome! Glad you're back to normal!
 
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