ok, I bought a 91 caprice 305 and I put a new fuel pump in it....the guy that tried to fix it said that the pump is fine because he ran a test on it but its not pumping any gas through the carburetor...... he said I have a wiring problem, could this be true ? or could the that pump is on backwards ? electrical ? any spark plugs I might need and I know for sure its not the battery please help!!!!!!!!!