my car first started off not wanting to start until i tried cranking it a couple times then it would crank,i had my rack and pinion replaced by my mechanic and he told me that the fuel pump was going out and the day he got done with the rack and pinion it wouldnt start and he said it finally went out.so i replaced the fuel pump(Ebay part) and it still wont start,what could it be?the pump,main relay????please help i havnt had my car running in like a month and i want to drive my car im payiong for!!!lol