Hello. Colleagues, what could be the reason for such smoke when the engine is cold? When starting a cold engine, it produces smoke which disappears after a while and then. Additionally, you can hear strange knocking noises. The injectors were removed and checked and are in very good condition. The first video engine starting at -5 degrees and car standing overnight, the second video 8 degrees in garage and the car stood for several days. Later there is no smoke.
Thank you and best regards
danielq
Joined
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11,325 Posts
Looks and sounds like a failing injector. I would suggest an injector leak off test on a cold engine.
You will most likely find one injector is not leaking off as much fuel as the others as the pintle in the injector is sticking and dumping excess fuel into the cylinder causing the knock and smoke
You will most likely find one injector is not leaking off as much fuel as the others as the pintle in the injector is sticking and dumping excess fuel into the cylinder causing the knock and smoke
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