All ActivityMost RecentMost LikesSolutionsIdeas? help? First motorhome , fuel issue, 81 P30 454So, I knew when I bought her that I would have to put a substantial amount of money toward issues I would come across, she is old. That being said I have a very general question regarding the process and where I should begin to diagnose and fix a problem that has arisen. When I bought the 81 p30 454 pace arrow (80K), she ran great all the way home, 260 miles, outside temp 5degrees Cold!. Then, a week later I fired her up to drive to a shop 70 miles away, I did let her warm up for a half hour, (outside temp 22degrees) as I was driving immediately I could tell she was misfiring, I could break 55mph, then she got worse and felt like I lost another cylinder, couldn't break 45mph. My question is where should I start, from the tank forward, or start with typical plugs, wires, cap and rotor? does anyone have experience with these old rigs and my issue? anty advice would be helpful.Re: Help! What size wheels are these? Im a newbie...Thanks all, I had a suspected they were the 19.5's. Dodge Guy is correct, I am searching for my first RV and from what I have learned reading all of the great info on this site, I may as well just expect to put new tires on all around. Also good to know there is possibly 225/70/19.5 option, I will check the spacing to see if it can work! Thanks again!Help! What size wheels are these? Im a newbie... Cant pinpoint the size, feeling uneducated regarding Motorhomes, but trying to learn. thank you