Engine cranks but will not started on my 2005 mazda 6 2.3

SOURCE: Mazda 2005 RX-8 wont start... ran yesterday, lights on & sounds

I have a 2004 that had the same problem. It sounds like the engine might be flooded. The best thing to do is to remove the fuse to the fuel pump. It will be listed under the fuse cover under the hood. Mine was a 20 amp but check to be sure. With the fuse removed, crank the engine for a minute to remove any fuel flooding the engine. Replace the fuse and crank the engine in 10 second intervals without touching the gas or you will reflood the engine. This process can sometimes take awhile and will drain your battery, so have it connected to an additional power source ( i.e. another car battery or jump box). When the car finally cranks over there will be a huge cloud of smoke so don't be alarmed when it happens. Lastly some words to the wise. This process CAN ruin your starter, but is essentially the same process that the dealership will you except that they will remove the spark plugs to drain the fuel and then charge you for new ones. If this process doesn't work then you probably need new spark plugs which is going to cost quite a bit. I was quoted upwards of $525 to fix this problem until I talked to a Mazda mechanic and found out how to do this myself. Just make sure that the engine is up to running temperature before turning the car off and you shouldn't encounter this problem again. I hope this helps you, and remember that if all else fails the dealer can fix it. It won't be cheap, but they will get it done.

I almost forgot, you HAVE to get the oil changed as soon as possible because there is probably gas in the oil now.

SOURCE: Loud acceleration noise in my 2003 Mazda 6 2.0 auto

one thing to check is rear engine mounting i have had a stone wedged in one and it causes a nasty noise when accelerating

SOURCE: Looking for the fuel filter in a 2005 mazda 6

It is attached to the fuel pump. Both are located in your fuel tank.

SOURCE: I have a 2005 mazda rx8. After running for a few

sounds like it needs to be taken to a madza approved repairer for then to be plugged in for a dianostic annalisis, too many warning lights for one fuse.

SOURCE: serpentine belt diagram mazda 6 2005

Here are links to the diagram...

If your engine is the 2.3L 4 cyl... http://www.gates.com/common/part_locator/view_diagram.cfm?id=S7042

If your engine is the 3.0L V6... http://www.gates.com/common/part_locator/view_diagram.cfm?id=S6036