Last summer my truck started missing a little and I could mainly feel it cruising down the hwy. I opened the hood one night and spayed a little mist of water on the ignition system. Found that my coil was arching a little. Well I bought a coil and finally installed it this last weekend. When I went to start it the truck would crank but would not start until I let off the key. Well I drove it like this for 3 days. It ran better down the hwy but it wouldn't start properly. Then yesterday it wouldn't start at all. It is a 1998 Chevy 2500 5.7 Vortec with 157,000 miles on it. Any suggestions.