96 Geo Metro

car starts some times then not, checked the starter ,alternator,fuel filter don't know why she starts and runs fine for a couple of days and the next wont turnover any help??

I had the same problem with mine.. it seems that the rotor button on these is really sensitive... clean it off really good or replace it see if that works

Could also be a bad starter. If the starter doesn't crank fast enough, the computer won't get enough data from the engine to fire up.