Standing at the front of the engine facing it. The number one plug is on the left side (near your belts)
In the engine ... usually on both sides or inline on the top.
In the cylinder head.
0.043
The 2.4 liter engine spark plug gap is .044"
If your engine is a V6 you will have 6 spark plug wires , the engine is V shaped , there will be 3 spark plug wires going to the front and 3 going to the back of the engine : X-----X-----X X-----X-----X front of Toyota Camry If your engine is a 4 cylinder , you will have 4 spark plug wires , the engine will be : X----X----X----X front of Toyota Camry
spark plug
0.043
go to part store get Spark Tester then take home and hook to end of spark plug wire and engine block.
.044
two spark plugs are located to the right side of the engine and the other two spark plugs are located on the left side of the engine.
There is a numerous number of reasons. Starting from piston rings and spark plugs and ending by tires, quality of gas and engine oil...
Number 3 is passanfer side 3rd one back, number 4 is first one on the drivers side