Car gives a pop sound before I start???

[Dugi]

Yesterday When I turned the key to on I heard a popping sound. It does this occasionally. Might my injectors be leaking and when I switch my key to on it will ignite the fuel?? sometimes when I drive hard I can smell the fuel. my mods are microtech ems, FMIC, fuel pump, 12 psi boost.

[Tartan]

Check for exhaust and intercooler leaks

[Dugi]

Wouldn't that make my car run bad or idle bad?? cause the car runs fine. it's just before I crank the engine it gives like a pop sound in the rear. occasionally that is.

thanks

[The Mic]

Are you sure it's the rear? If it's from the front, inspect your spark plugs.

[Dugi]

yeah I can hear it coming out of the exhaust. thanks though

[The Mic]

If it's misfiring, your car is running rich. Check your o2 sensor and get it tuned up.