Harry Yarnell I see you in the Cadillac forums. Think wrenching on a Reatta is bad, get yourself a Northstar Eldorado and scar up your knuckles. You can put bags of groceries in front of the radiator, but good luck to you behind the radiator. 2000 Eldorado with 13,000 miles, still new car smell...... Of course it was not the O2 sensor, so now I am going to change plugs and put in AC Rapidfires. I know plugs and wires would typically be the first route to take, but I had done that just a couple months ago and added a premium oversize silicon wire set.