I just took the catalytic coverter out to put in a new one, so I trireid starting it while it was out and all is does is crank. Battery is good ,cranking hard. I did notice car was out of gas so I put a couple gallons in. It started fine with bad Cat in, could having it out affect something? I can smell fuel on right side driver side of motor but Im not sure where the fuel oumo or any relays are. Could it need to be primed somehow?. Any help is appeciated.