What did you expect from the Forum, here’s our problem: Volvo 940 with B230FB engine Launched and always ran perfectly, no jerking or any signs of a malfunction 4 weeks ago, the engine went off after 15 seconds and can’t be started again Investigation of the TCS (Swiss ADAC) came to the conclusion, it must be either the ignition module or at most the crankshaft sensor defective Both components we replaced one after the other, no success. New ignition coil, the same image. Candle from the distributor directly to mass: candle of ignition coil directly to mass: It arises when starting (key position 3) a single (weak) ignition spark and then no more?? On key position 2 (operation) the candle constantly sparks. Voltage at the ignition coil on key position 2: 12.7V Voltage at the ignition coil on key position 3: 10.5V ignition cables are measured, OK. Candles OK, electrode distance is running 000. Fuel pump is running. This situation was right before we replaced with a crankshaft sensor and ignition coil the car did not want to be perfect?