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Old 11-22-2013, 03:26 PM   #1
Join Date: Nov 2013
Posts: 12
electical wires

i have 2 questions,
first one i want to know how much spark plugs effects the power of the engine?
second one is the jeep have a really big wiring issue, there is wires coming out from everywhere and the dash board lights,radio,front and rear lights are not working right. so is it possible to change all the wires i mean can i buy a full wiring pack for the yj?

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Old 11-22-2013, 05:56 PM   #2
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Join Date: Apr 2013
Location: Plymouth, CT
Posts: 384
Spark plugs will definitely affect power and response. They are cheap, change em and make sure they are gapped properly. Also your distributor and rotor should be checked.

When I did my plugs I felt a big improvement. I later did the CRT hei swap. Which again got me some more improvement in throttle and smoother idle.

As for the harness, painless wiring makes a replacement. It's very spendy though. I personally would straighten out what you have, or get one from a junk yard. You see em on eBay too, but be careful. They might be hacked up and missing connectors.

Good luck!!

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Old 11-22-2013, 05:58 PM   #3
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Old 11-24-2013, 08:15 AM   #4
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Join Date: Jul 2012
Location: JAX, FL
Posts: 635
Buy a FSM and learn how to use a soldering iron. Wiring is easy just tedious.
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Old 11-25-2013, 10:31 AM   #5
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Join Date: Oct 2009
Location: Southeastern Az
Posts: 86
You didn't say what year your wrangler is, but I bought a complete harness for my whole jeep off ebay for $250.
The ebay store that I used is no longer there, but if your YJ is an 87-91, I found this for you
87 90 Jeep YJ Wrangler 4 2L 6CYL Engine Wire Harness Under Dash to Tail Lights | eBay

Plug and play.....
My driveway IS a Jeep Trail.
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