i have a 1990 300zx with 165,000 miles on it. i've been having difficulties getting my car started. i would go turn my accessories on and everything would be ok. i'd go to start it, and my car would be completely dead! no click, no turn over......dead. it was suggested to me that i should change my battery, but my battery has tons of juice. i had it hooked up to another car to see if it would start, nothing happened. some people say it could be the ignition switch, others say its a faulty alternator. might not be either. could anyone shine some light on this situation for me?