Harold is proabably right, you have more than just 1 problem. I would get the fuel system cleaner out, the car won't run right with it and it is hard to adjust the mixture screw with the cleaner in there anyway. Get fresh fuel in and have the mixture screw adjusted, it is VERY sensitive so you really only make very minor adjustments. Once set it usually never needs to be adjusted again unless you touch it. It should only be adjusted after you replace all the worn parts. Too many times it is adjusted to try to correct a problem in the system like dirty fuel injectors, dirty air filter, bad 02 sensor, vacuum leaks, etc. The hard hot start could be the very common "bad accumulater syndrome". Just switch the cold start and CPR plugs to verify when starting hot. On an automatic you have an additional vacuum line down to the front of the transmission. Check the hoses at both ends. Vacuum leaks will make any problem you have worse so go over the entire car for them. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "freakybeetle" <freakybeetle@xxxx> wrote: > Thanks for the ideas so far! > > I might help if I give you a little more background on the problem. > When I first bought the car it was running very, very rich. The CO > had already been adjusted (plug was removed) when I drove the car > home day one. I have since then replaced the plug with the DMC >