Why my car do not start? on 1991 Buick LeSabre

I've tested the starter and the alternator out at the mechanic shop, but they said that it's working fine. I also changed the battery and still my car don't start.

by in Oakland, CA on March 22, 2010
2 answers
ANSWER by on March 22, 2010
Check the ignition switch as this car is old enough to have worn it out
ANSWER by on September 02, 2010
bad coil packs or modulator under coil pack
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