740 gl rex regina - the o2 sensor is insane to remove - I limped to a muffler shop and the boys there did the coolest thing. they torched it got my old o2 sensor out and rethreading the bung hole and let me install my new one from groton - for free kaboom - yep I tipped them so all were happy.
740 gl b230 f now runs almost perfect a little hesitation from standing stops and 2 tries to start. New plugs ngk's, new ect sensor, from the junk yard a replaced IAC, me thinks the map sensor is stodgy or wrong.
I cannot find the recommened replacement map anyplace but car is much better.
Doing all of this in frosty Chicago so will have to be patient with a throttle body cleaning but man so happy to have wheels.