filter

My 89 Cherokee has had a hard start and rough idle since I started driving it about a month ago. Today it started chugging real hard. It's doesn't die, but when you hit the gas the RPMs move up and it lurches forward, but doesn't move very far. The hard start is intermittent. It's hardest on...

I bought the haynes book jeep at auto zone, it tells me that I don't have to change the fuel filter until the check engine light comes on for it. Would it be a good idea to change it anyways? And is my fuel line pressurized? Or can I just switch it out myself?