Car hesitates on 2005 Pontiac Montana

I just put a new fuel pump on my car.but when I go to start my car it still hasitate to start up.what could b wrong with it? my mechanic told me it could be some kind of security system once I putI put the key in the ignition wait until the security lights go off and start it that true?

by in Lakewood, OH on March 11, 2013
2 answers 1 comment
ANSWER by , March 11, 2013
what is the fuel preesure and does it bleed off fast after eng is turned off. could be fuel pressure reg issue
ANSWER by , March 11, 2013
has mechanic checked ignition system? had simular problem, turn out to be alternator. review when last tuned up. could be a fuel issue also.
COMMENT by , March 12, 2013
Okay thanks guy's. I just bought the car last week and having trouble with it already. I don't know when was the last time it had a tune-up.I thought if it was alternator that my lights Will b dull?