found a '93 today for $1700 with 100k on it. It just gives me this error when i plug the engine checker in "223: distributorless ignition system, loss of dual plug inhibit (DPI) control. 224: and erratic IDM input to processor, or 224: (trucks only) spout circuit ground/coil 1,2,3, or 4. it idles a little rough, when i give it gas and let go itll bog down for a couple of seconds, but it revs perfect. other than that it is perfect. and it starts quick and strong, so the compression seems good. any ideas guys?