First things first...Is your check engine light on? Can you check the codes?
Now...
You need three things to make your car "Go." Air, Spark, and Fuel. Sounds like you have taken care of the Spark part of the equation. You need to address the Fuel part by checking the fuel pressure. This is achieved by finding the fuel pressure test valve on the fuel rail.(Not all cars have a test vale and require specialized test gear to test the fuel pressure) It looks like a bicycle air inlet and might have a plastic cap on it. The shadetree mechanic ways to do this is by using a paper towel or rag depress the center of the check valve and, if there is pressure in the system it will put out a small amount of gasoline in a rapid fashion. You may also want to check the fuel pump and filter. The fuel filter is located WITH the fuel pump AKA fuel module is what Mitsubishi calls this bundle, to access remove rear seats where you will find the cover to the assembly. The Fuel pump and Fuel Filter are integrated and cost around $90 to replace. You might also have clogged injectors. As far as the "Air" part goes, check you air filter and that's about all you need to do on that front.
Answers & Comments
First things first...Is your check engine light on? Can you check the codes?
Now...
You need three things to make your car "Go." Air, Spark, and Fuel. Sounds like you have taken care of the Spark part of the equation. You need to address the Fuel part by checking the fuel pressure. This is achieved by finding the fuel pressure test valve on the fuel rail.(Not all cars have a test vale and require specialized test gear to test the fuel pressure) It looks like a bicycle air inlet and might have a plastic cap on it. The shadetree mechanic ways to do this is by using a paper towel or rag depress the center of the check valve and, if there is pressure in the system it will put out a small amount of gasoline in a rapid fashion. You may also want to check the fuel pump and filter. The fuel filter is located WITH the fuel pump AKA fuel module is what Mitsubishi calls this bundle, to access remove rear seats where you will find the cover to the assembly. The Fuel pump and Fuel Filter are integrated and cost around $90 to replace. You might also have clogged injectors. As far as the "Air" part goes, check you air filter and that's about all you need to do on that front.
Good luck!