Ignition Wire Looms

[88mjblue]

On my other 4.0L's I've had these built-in spark plug wire looms (see below).

On my new renix MJ, I don't have these and don't see any sign of there ever being any.

I know there are aftermarket spark plug wire looms, has anybody had success with them? How do you mount them, to the valve cover bolts?

Thanks, I want my wires to be nice and organized.

 

 

[91Pioneer]

Hit up a junkyard

[gogmorgo]

Google zip-tie wire separators.

[Eagle]

I've never seen looms like that on an XJ or MJ. I don't even like the concept -- the more you run the wires parallel, the more you create the possibility of cross-fire.

[91Pioneer]

My 91 MJ has that plastic separator.

[ScottJeep]

Had those separators on my 97' XJ.  

[HOrnbrod]

They used those wire separators from 1991 - 1999.

 

[88mjblue]

I've never seen looms like that on an XJ or MJ. I don't even like the concept -- the more you run the wires parallel, the more you create the possibility of cross-fire.

 

 

I have heard that before, but these are OEM looms designed to prevent crossfire.

I have another idea: what about getting cut-to-length ignition wires and cutting them as short as possible from distributor to spark plug?

[FrankTheDog]

Get the oem looms and run them like the picture with oem wires.

I've only had one HO XJ that arced out and it was @ 145,000 on the original wires.

[Blue XJ]

You should have any issues running them like that.  The EMI field that might come out of them if the insulation is damage will interfere with others less than compared to crossing each other perpendicularly. 

[88mjblue]

You should have any issues running them like that.  The EMI field that might come out of them if the insulation is damage will interfere with others less than compared to crossing each other perpendicularly. 

 

Perpendicular cross is bad, right? I see hot rods running long stretches of parallel wires all the time...

[Blue XJ]

Yeah, I mistyped on my first post, he shouldn't have any issue running them parallel to each other.  That is prefered, criss cross would be bad, assuming the insulation failed.