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Old 10-09-2015, 02:17 PM   #1
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Spark Plug Wires

My 4.6 4V has gone through plug wires, only lasting about a year.
MSD set went bad soon after installing them. Installed FRPP wires and they lasted 2 years.
I installed a cheap set until i can figure out how to obtain a quality set.
Anybody else experience similar troubles?
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Old 10-09-2015, 02:29 PM   #2
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Nope. That is odd that that is happening. Stock coil packs? Maybe a good excuse to buy a Red Monster harness and go with COPs?
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Old 10-09-2015, 02:57 PM   #3
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What is happening to your plug wires that is causing you to have to replace them so frequently?
They normally last 100k+ miles.
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Old 10-09-2015, 05:00 PM   #4
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this is odd. the only think i can think of that would blow out wires is too much electrical flow over too much resistance in the wires. maybe too low voltage causing a huge amperage? what exactly are you observing happening to them that they go bad? burns? falling apart? anything visible?
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Old 10-10-2015, 12:29 AM   #5
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Misfire, CEL codes indicating misfire, sputtering during idle and acceleration. Yesterday the misfire codes followed the wires moved around. So I replaced them with a chaep set and it is running great. Prior to that, I replaced plugs, swapped out the original coil packs, fuel filter, and even a secondary O2 sensor.
When I bought the car 2.5 years ago, it had an OEM coil pack and one generic aftermarket coil.
I installed 2 WeaponX coils, new plugs and wires.
Could be just my bad luck.
I did have some grounding issues and had to install a new alternator. Don't think that could be attributed.
Ford Racing wires are the "go-to" sets to have installed, correct??
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Old 10-10-2015, 05:21 PM   #6
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No actually they are not. You want the black OEM Motorcraft wires. Rockauto has them for $50 last time I checked. Also re check all your grounds and I would replace the stock main grounding strap with an 8 gauge cable and clean the **** out of the attach points.

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Old 10-10-2015, 05:53 PM   #7
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like the throw out bearing, use oem only!
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Old 10-11-2015, 11:10 AM   #8
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Quote:
Originally Posted by scottydsntknow View Post
No actually they are not. You want the black OEM Motorcraft wires. Rockauto has them for $50 last time I checked. Also re check all your grounds and I would replace the stock main grounding strap with an 8 gauge cable and clean the **** out of the attach points.

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Thank You!
I will most certainly do that. I will order the wires.
If you could, please provide an example of an easy location to attach the ground wire on block and frame, thanks.
I just recently replaced positive and grounding wires throughout the engine bay, cleaning up every connection spot. I added a ground wire from the wire loom attachment bolt above alternator to frame in front of car.
Thanks again!
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Old 10-11-2015, 11:26 AM   #9
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What does this mean? Keep the 2 wires as far apart as possible????
Because cylinders 6 and 5 fire consecutively, these two plug wires need to be
routed away from each other. Placing any length of these two cylinders wires parallel to each other,
invites inductive cross fire, which could be quite destructiv
e.
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Old 10-11-2015, 03:59 PM   #10
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It means precisely what it says.
Those two cylinders fire one after another, so you want to try to route those two wires so that they are not touching each other, and are separated by using strategically placed spark plug wire looms.
Since those two cylinders fire so close to each other in the firing order, and they are right next to each other in the block, you can potentially have the spark from one of the cylinders firing the other cylinder at the wrong time. This can cause a misfire, or detonation, in one or both of those cylinders.
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Old 10-12-2015, 06:51 AM   #11
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thats part of where running oem wires comes into play. they are going to have better shielding than the cheap wires, but that is still a lot of power running through those wires. You dont want interference.
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Old 10-13-2015, 12:52 PM   #12
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Got Ya.
Done, did it.
Thanks.
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Old 10-13-2015, 04:48 PM   #13
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And just fyi, FRPP is not OEM. The Motorcraft wires are going to be the best quality wires and are a nice stealth black. And say cheaper than the gimmick MSD/Spiro/whatever wires.

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