Re: '03 Aviator won't stay on after changing spark plugs
Verify your wires are connected in the correct firing order and firmly in place. You'd be surprised how many have sworn that they all ready did, then found out they really didn't. Make sure the clip isn't loose on the end of the plug. By the way, which plugs did you put in?
'Scuse me, while I scrape this Honda outta my treads.