I have a 2001 volvo s60 t5 and the check engine light indicated that I had misfires, so I changed spark plugs and ignition coils, and now car cranks but won't start, the battery is 9/12, I replaced it with my daughters car Hyundai elantra battery 3/16 but not sure if it enough voltage to start car as the battery is a lot smaller in size, have no idea what the problem could be

 

you need to check if you have both spark and gas in order to make a kaboom in the cylinders. Is there fuel pressure at the rail?

 

How would you recommend I do that?