I've found couple thread regarding this issue. I washed my 80 the other day with a pressure washer (not too high). Afterward, it started fine. After a little while it idled a tad rough. I drove it for about 30 miles. Still running rough. I parked the 80 and then drove it for about 100 miles within two days. Still running rough. I noticed when the rpm is around 2K, she's really hesitated. Once past 2k, she's going but still a little rough. I checked the diz and it looked ok. I was thinking the plugs, but have not check them. I have not run the obd2 yet. Could it be the plugs? I've washed her in the past and after about 10 miles or so she's back to normal. Hate to see her coughing. Suggestions please. Thanks.