Here are the facts. 1989 740GL sat inoperative for seven years. Efforts since have made car run well, cruises at 75 and gets 24 MPG with no smoke or problems except it will not pass NOX. Cleaned tank and new pump in tank, new gas filter, new pressure regulator and pump relays, plugs, wires, cap and ...

Hello Blubrick, I am also in S.F. BAY AREA and have a 740GL that passes smog except for NOX [Gross polluter numbers like yours]. I keep getting 232,231 codes. Were you able to cure your NOX problems and pass smog? I would appreciate you sharing your magic as I have spent way too much time and money ...