Mitsubishi Repair: car wont start, little cars, good shape

Question
I own a 1999 Diamante I change the starter and the battery and had the alternator tested.  It started a couple of times after I changed the battery but know again it doesn't.

Answer
Jorge: Are you sure you hooked the cables on the battery up right? The red, pos cable to the red pos (+) side of the battery, and then black, neg cable to the black neg (-) to that side of the battery? Are the cables in good shape all the way from the battery to where they hook up, you need to follow them and make sure. Are they tight on the battery? These little cars like them tight on the battery. Are you sure the starter is hooked up right, all the wires where they should be and are those wires tight? Are you sure you got a good battery sometimes you get one with a weak cell in it and so it does not have the power to turn the engine over. You should get the battery tested to make sure. Things to check... God bless: Linda