2010 XLT 4L
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Joined: Apr 2020
Posts: 61
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From: Bartlett, il
2010 XLT 4L
Hi I’m coming up on 90k and time to replace the spark plugs. Do folks recommend replacing the wires and coil pack at the same time or just leave well enough alone? Thanks for your input.
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Joined: Sep 2019
Posts: 1,220
Likes: 185
From: Hackensack, Nj
I'd inspect the wires' insulation for degradation. The wires in my '05 look 'soft and subtle'.
The few times I've replaced wires, operation improved BUT I likely changed the plugs too.
Coil packs last a long time. I'd inspect for cracks and any evidence of tracking (carbon burns)
STORY:
I secretly replaced plugs, cap, rotor and wires on my sister's Jeep Cherokee at 100k.
The next time I saw her, she asked, "WHAT DID YOU DO TO MY TRUCK?"
She was pleased.
The few times I've replaced wires, operation improved BUT I likely changed the plugs too.
Coil packs last a long time. I'd inspect for cracks and any evidence of tracking (carbon burns)
STORY:
I secretly replaced plugs, cap, rotor and wires on my sister's Jeep Cherokee at 100k.
The next time I saw her, she asked, "WHAT DID YOU DO TO MY TRUCK?"
She was pleased.
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