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Eric, Automotive Repair Shop Manager
Category: Jeep
Satisfied Customers: 30830
Experience:  20+ yrs. experience as repair shop manager and technician.
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I'm having a miss on my 2009 Jeep Liberty 3.7l, and want to

Customer Question

I'm having a miss on my 2009 Jeep Liberty 3.7l, and want to verify the firing order/coil pack wiring diagram. I think the cylinders start front left #1, #2 to the right, middle left #3 and so on. Can you tell me which cylinders the packs on 2,4 and 6 also fire?
JA: Has there been any recent electrical work done on the car?
Customer: I changed the plugs
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: yes, I'm not surr if its a bad pack or wires
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Jeep Mechanic about your situation and then connect you two.
Submitted: 8 months ago.
Category: Jeep
Expert:  Eric replied 8 months ago.


Driver side is 1-3-5 front to rear

Passenger side is 2-4-6 front to rear

1feeds 6

3 feeds 2

5 feeds 4

Customer: replied 8 months ago.
Thanks I'll see if that cures it. I think it's wired correctly, It may be a bad pack or wire. It has a miss
Customer: replied 8 months ago.
Ok, that diagram is the reverse of what I have UNLESS #2.4.6 are the drivers side (which is what I thought) then 1 feeds 6 and so forth. the only wires that could be switched are the ones up front. I did them one by one, so I'm pretty sure what I have is correct.
Expert:  Eric replied 8 months ago.


attached is diagram showing coil locations on left of engine and labeled as 1-3-5

2009 Jeep Truck Liberty 2WD V6-3.7L

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ENGINE FIRING ORDER - 3.7L V-6 1 - 6 - 5 - 4 - 3 - 2 Lead Cylinder ................................................. No. 1 Left Bank

Expert:  Eric replied 8 months ago.

I noticed we have not yet resolved your concern you asked about. I would sure appreciate it if you would reply so I can offer my skills and knowledge and repair guide access to help as best I can.

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