I have a '98 Mustang 3.8, V6, 5 speed. When I turn the key, the car will try to crank for about 20-30 seconds before it starts. It will start every time, though. We changed the spark plugs, and checked the starter. We have asked a few people what it might be, and we dont want to have to pay to get it hooked up to a computer, so I was hoping you could help. Any comments would be greatly appreciated. Thanks.