If you have the wrong leads going to the wrong spark plugs, then you will have a spark when the cylinder is somewhere other than where it should be, which is at the top of the compression stroke ready to drive the piston down and provide power. If you can start your car, it will be running very rough, have no real power at all and your gas mileage will be measured in gallons per mile. You are also running the risk of serious internal damage to the very expensive valves, so I suggest you fix it immediately.
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The firing order is stamped into the block, usually on the front side.
Hi The firing order is: 1-5-3-6-2-4
The firing order should be 1-5-3-6-2-4.
firing order for a 2002 Mitsubishi montero sport with 3.0 engine is 1-2-3-4-5-6. Odd numbered cylinders, 1-3-5 on passenger side and even numbered cylinders, 2-4-6 on driver's side.
All 6 cylinder inline engines carry the same firing order: Too young, too old, just right. 15 36 24