u need to figure out if ur not gettin spark or fuel....seems like u really dont know...just ur car wont start...make sure ur gettin fuel at the injector...make sure ur gettin spark at the plug...once u figure out if its not gettin spark or fuel..then u can go from there...and yes if could be the main relay...i found a site that shows how to fix them a long time ago when my car had this problem...u take it out and apart and make sure all the lines and solder are still together and not cracked etc..if they are u resolder them together ....but that wasnt my problem..mine was the coil..which u replaced along with the ignitor so u might have problems else where...but figure out exactly what ur not gettin first...and then we can help u diagnose the problem