Hard start '98 buick skylark

I have a hard start problem…starts and dies…diagnosted as anti-theft problem…can wait 10 minutes and car may (may not) start…tech said common to this model is a bad cluster…sent it to be tested and repaired…they tested it said it was good…reinstalled it also checked ignition passock voltage…VTD…reads 2.3volts always…installed an ignition by pass kit…still has same problem…only thing different from the begining of the problem is now anti theft icon on dash lights up, gear position selector shows only park and car rarely stays running…apparently the anti-theft system is working as it is intended but what is telling it to shut down the fuel to the engine.??? HELP!! HELP!!