what can you tell me about the motor/running gear and electronic's on this car? interested both in the 300c and 300c hemi. Haven't owned a chrysler product in years but know the base car components can't all be redesigned? ,,, or, are they? Any issues to be aware of with anything built into the car or componenets used? thanks

:) My problem started about a month ago. I have a 1997 Pontiac Grand AM SE. 4 cyc., Auto Trans, 2 door The timing chain and all 3 gears were replaced. It is an interfer. motor so I ended up replacing one valve as well because it was bent. Since then the O rings for the injectors, the spark plug boots have both been replaced as well because there's a skip on cycl's 1 and 3. NOW when the computer is hooked up you can notice this skip but it doesn't register anything on the computer as being a problem. What could be causing this skip? It comes and it goes but when it comes it'll shake you right out of the car. When the RPM's are up it stops.... suggestions? Please help I'm running out of ideas and am becoming very frustrated. Thanks