Just finished rebuilding the lower end of a 93 lumina 3.1 with a cam sensor (makes a difference). Now I can not get the 1. lifters to pressurize, 2. check coolant light to go out, 3. idle once it warms up. Don't have a clue what to do. I have checked all vacuum lines, electrical connections, bled the air out of the water lines, changed plugs & wires. what else? HELP