ok guys sorry this is not hot rod related but my brother in law has a '91 suburban and it wouldnt start at the gas station last week.....thought it was fuel pump....so he put a new pump in it and it started a few times but then wouldnt start again....so he put a new filter in it and it started once and nothing!...then he changed the injectors and it started a few times and after shutting off NOTHING! if you crank it it wont start but if you pour gas down the intake it will start and run fine.......... i'm stummped by this point...any help?????