what is the 08 jeep wrangler 3.8 firing order find diagram now

The firing order for the 2008 Jeep Wrangler equipped with the 3.8L V6 engine is 1-6-5-4-3-2.

Cylinder Identification

When facing the engine from the front of the vehicle:

• Right Bank (Passenger Side): Cylinders 1, 3, 5 (Front to Rear)
• Left Bank (Driver Side): Cylinders 2, 4, 6 (Front to Rear)

Cylinder 1 is the frontmost cylinder on the passenger side.

Firing Sequence

The spark plugs fire in this exact sequence: Cylinder 1, then Cylinder 6, followed by Cylinder 5, then Cylinder 4, next Cylinder 3, and finally Cylinder 2. This sequence repeats.

The ignition coils are typically mounted directly on top of the spark plugs (coil-on-plug setup). The firing order sequence dictates the order in which the Powertrain Control Module (PCM) triggers these coils.

Diagram Representation

Visualize the cylinder banks and firing order like this:

Front of Engine

Left Bank  Right Bank

(Driver)   (Passenger)

2             1   <----- Fires FIRST (1)
4             3
6             5

Firing Sequence Arrows: 1 --> 6 --> 5 --> 4 --> 3 --> 2

Critical Notes

• Distributorless: The 3.8L engine uses individual coil packs, not a traditional distributor.
• DO NOT Guess: Using the wrong firing order can cause severe engine damage, misfires, and poor performance. Always confirm cylinder positions and the 1-6-5-4-3-2 sequence.
• Service Manuals: Reputable Jeep Wrangler repair manuals or official service information systems (like Mopar tech docs) provide definitive diagrams and procedures for ignition system work.