Hi I was wondering if anyone can answer a couple questions I have a 04 XC90 Volvo SUV 2.5 Turbo 5 cylinder the check engine light started flashing it said low coolant that never came back on but it's check engine light still stayed on and it said misfire cylinder one and three I took cylinder one and three out and I replaced them with two and four and it's still misfire on cylinder one and three and two and four I'm not sure what else I can be looking for

 

A engine needs compression, correct amount of fuel and spark at the right time.

What is the compression?
Are all injectors firing? What is the fuel pressure?
You swapped coils or plugs or both? How old are the spark plugs? And what brand are they?