My 1990 gmc tracker was doing fine all of a sudden the check engine light would go on and off for a couple days then I was driving it the other day and it died now it wont start anymore, there is gas at the carbs and there is spark but it wont start could it be the ecm computer/.
IF you have fuel and spark, it should run unless the spark is too weak or the fuel pump pressure is too weak. Check for a hot blue snapping spark at the plugs. Also, check fuel pump pressure. If the check engine light was on, there should be a trouble code stored in the computer that will direct you to the problem. Most parts stores will scan it for free, but since it doesn't run, ask if they will rent or lend you a scanner.