My car started having this problem of starting hard several weeks ago. It turns over but faster than normal. I recently had the fuel pump in the gas tank replaced along with a new fuel filter. I thought I was having a leaking fuel injector because sometimes there would be a puff of gray smoke coming out of the exhaust that would smell like gas. I got the fuel rail out and turned over the engine, but no fuel injectors leaked so no luck there. Could a faulty ignition module cause this hard starting problem? I do have 80K miles on this rebuilt motor maybe spark plug wires and plugs are due, along with distributor cap and rotor. Any help would be appreciated. Thanks in advance.