Experts...I just acquired a 91 300e 3.0 in great shape. I've replaced the fan and fan clutch due to being frozen and the fan being chipped (if anyone needs to know how, let me know...did it in 10 minutes). I also had a fairly rough idle and read on here to replace plugs and O2 sensor which definitely improved idle consistency and stopped pulling me forward at stoplights. Only problem I still have is a slightly rough idle in drive while at stop (around 575 rpm and need 600-650 rpm). Ordered new OVP relay and still waiting for it to arrive. Car shifts great (although I don't see the modulator adjustment per documentation and discussions on my trasmission for hard 1st shift on the driver side adjustment underneath), everything else seems to be as good as can be for an old gal. Oh, also, after I replaced O2 sensor, my MPG almost doubled (20-24 mpg now and used 95 or earlier Ford Mustang O2 Sensor from Kragen). I see I do not have an idle control valve adjustment as it is computer controlled. Will the OVP possibly resolve the ide or what else should I check? Thanks guys! Awesome forum so far!