The firing order for the 2007 Jeep Grand Cherokee equipped with a 3.7-liter PowerTech V6 is 1-6-5-4-3-2. This sequence determines which cylinder fires first and continues in that order around the engine, a detail you’ll need when wiring spark plugs or troubleshooting misfires.
The 3.7L PowerTech V6 is a 60-degree V6 used in several Jeep and Chrysler models from that era. Knowing the firing order helps with maintenance tasks such as replacing ignition components and diagnosing ignition-related problems.
What the firing order means for maintenance
Ignition components—spark plug wires on older systems or individual coil packs on newer setups—must be connected to the correct cylinder in the exact firing sequence. Any misconnection can lead to misfires, rough running, or reduced power. The following order applies to the standard installation as most collectors and service manuals illustrate it for the 3.7L V6 in this model year.
Below is the standard firing order for the 3.7L PowerTech V6 used in the 2007 Grand Cherokee, shown in terms of cylinder numbers as labeled on the engine.
- 1
- 6
- 5
- 4
- 3
- 2
When performing maintenance, verify the cylinder numbering on your vehicle’s specific engine and consult the factory service manual for guidance, as production revisions or regional specs can affect numbering or wiring layouts.
Cylinder numbering and practical mapping
In a typical 3.7L V6 configuration, cylinders are arranged in two banks of three. The order above corresponds to how technicians trace ignition runs across the two banks and ensures the spark events occur in the correct sequence. If you’re replacing spark plug wires or coils, always map the order against your vehicle’s exact VIN and service documentation to avoid cross-wiring.
Summary
For a 2007 Jeep Grand Cherokee with a 3.7L V6, the firing order is 1-6-5-4-3-2. Correct wiring according to this sequence is essential for optimal engine performance and reliability. Always confirm cylinder numbering and wiring layout against the official service manual for your specific vehicle before performing ignition work.
What jeeps have a 3.7 engine?
While the base sports model of Jeep Liberty used a 2.4L engine, upgrades to a 3.7L engine were also available in the earlier sports models from 2002 to 2004. In fact, it was also standard in Limited and Renegade models in the first generation Jeep Liberty produced before 2005.
Where is cylinder 1 located on a 3.7 Jeep Grand Cherokee 2005?
Side 1 35 so the closest one to the radiator is cylinder number one and the farthest one and the closest one to the firewall. Is cylinder number five so one 35 on the passenger.
Is cylinder 1 at the front or back?
In a straight engine the cylinders are numbered from front (#1 cylinder) to rear.
How much horsepower does a 2007 Jeep Grand Cherokee 3.7 have?
210 horsepower
At 210 horsepower, reviewers find the 3.7-liter V6 engine weak but adequate.