Since I own my 93 Eldorado Northstar the car runs in "Service engine soon" mode. It has a rough idle and poor performance, especially acceleration. The exhaust has a bad fuel smell and gas consumption is much too high. I read out codes and erased them several times. The "history" codes change from time to time, but the "current" codes are always present. It´s "PO 80" (fuel system rich) and since some time also "PO 83" (Crankshaft to Ignition Module Failure) I changed spark plugs, plug wires, oxygen sensors, EGR and PCV valve as I thought it would be good anyway as the car has 200 K now, but nothing changed. I don´t know what to do anymore. Where is the Crankshaft to Ignition Module and how can I check/ change it? As acceleration is really bad and the car blows out clouds of unburnt fuel under hard acceleration I think the ignition doesn´t advance in "SES" mode. I love that car, but that really drives me mad. Please help!!!