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I already changed the spark and lead with new ones on cylinder 1 , still have exactly same roughness and rotten egg smell. so next step if it not a faulty coil will be compression and injector test, right? my previous data reading were made at 720RPM

thanks, I will make some check. just in case I am preparing some spare injector Bosch 0280155787 is the correct part? is it possible that the cause of the roughness in cylinder 1 detected by the ecu was actually provoked by an other cylinder (cylinder 8 for example)??

level 5 for roughness on cylinder 1 is at idle. the engine vibration and rotten egg smell is strongly felt in the cabin when driving. I have no fault regarding the injectors?..., and the plug (picture attached) removed from the cylinder 1 was corroded on the wire side but not wet despite the...

Suddenly my pet develop vibration and rotten egg smell from the pipe. after checking and replacing the spark and HT wire on the cylinder 1, nothing change... I keep the roughness in cylinder 1 and NO FAULT CODE. do not know what to do.. here is the diagnostic screenshot please advice. Thanks