Ya got two symptoms to pick from. One is the starter cranks the engine but the engine will not start or run. Although not common, that would be cause to suspect the coil pack. The second symptom is the starter does not crank the engine. That could suggest the battery or starter.
If you hear a single kind of loud clunk from under the hood each time you turn the ignition switch to "crank", but it doesn't spin the engine, suspect worn solenoid contacts inside the starter motor. They can be replaced for around 20 bucks but most people just replace the entire starter. The additional clue is it WILL crank the engine eventually if you turn the ignition switch enough times. This problem always starts out as an intermittent problem and will get progressively worse over weeks and months.
If you do not hear that loud clunk, more in-depth diagnosis will be needed but a likely suspect would be the neutral safety switch.
Tuesday, June 21st, 2011 AT 6:12 AM