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The firing order for the 2015 Subaru Forester 2.5i is 1-3-2-4. This means that the spark plugs will fire in the following sequence: first cylinder, third cylinder, second cylinder, and fourth cylinder.
The firing order of an engine refers to the sequence in which the spark plugs ignite the fuel in the cylinders. The firing order is determined by the engine's design and is important for ensuring that the engine runs smoothly and efficiently.
In a 4-cylinder engine like the 2015 Subaru Forester 2.5i, the cylinders are typically numbered from left to right, starting at the front of the engine. The firing order for a 4-cylinder engine is typically 1-3-2-4 or 1-2-3-4, with the spark plugs firing in a sequence that alternates between the left and right sides of the engine.
Please define "fire power". Is this just the power from the battery swinging the engine, or did you check if there is a healthy spark on the plug wires? If an engine dies without warning, the chances are very good it is the crank angle sensor in which case there will not be any spark on the wires even though the starter will swing the engine quite lustily without starting.
Firing order refers to the order in which each piston in an engine reaches the start of its power stroke and the spark plug fires. For example a typical firing order for a V8 engine might be 18436572, meaning first the #1 cylinder fires, then the #8, then the #4, and so on until the #2 cylinder fires and the process starts over with the #1 cylinder. Firing order is not necessarily the same for all engines.
Find out which cylinder is not firing. Before it starts firing pull the plug and see if it is wet. If it is I would say that the injector was stuck open.
Here are the firing order diagrams for those engines and I hope that they will help you solve the problem that you are having. For some reason Ford has listed the same firing order for both engines starting in 1995.
Firing order is
1-3-7-2-6-5-4-8 Passenger side of engine starting at front and going
back is 1-2-3-4 Driver's side starting at front going back is 5-6-7-8.
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