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coltThis is the 90? What engine?
How can I tell if late or early yearWhich engine, 2.3L or 2.9L? Had a tune up lately (plugs and wires and distributor cap and rotor if 2.9L)? If late enough in '90 to have a MAF sensor I would get some MAF cleaner and clean that and if the oxygen sensor(s) haven't been changed I would change those, '90 is a split year, early models had 3 wire and later had 4 wire...