Hello forum! I’ve had quite massive ignition problems lately with my 2nd car, a V40 model year 2004, 1.8, 90 kw -122 hp automatic circuit. I had due to strong noises of the hydro plugs let the engine clean with Mathy-C, the engine in the oil area. Then the used oil hot as it was drained, old oil filter off, new Olfilter bolted up. New engine oil from Castrol 10W40 A3/B2 cast 5,4 liters pure. Then the V40 50 to 100 km driven at different speeds. The noises from the hydro plugs are still no longer there. The cleaning was a success. But there for quite massive ignition problems. Sometimes the V40 only jumped on the third time. Here it was also very cold. I had the alternator suspected that it was the battery badly lad. Measured at the scald engine, good values. Battery 24 hours on charge again and then it jumped again. Then it was probably the battery, so I thought. There was a lot of snow, from the snow was not cleaned on the road.