Constantin
Member
So i got a 2003 passat, AWX engine. That is 1.9 tdi PD.
Since january whenever i start my car after in the morning (or basically happens whenever i leave my car off for over 8 hours), no matter hot or cold weather, i would get huge clouds of white smoke that smell like diesel accompanied by RPM play. This whole thing lasts for around a minute, then the smoke disappears, the RPM get stable. Then, if i switch the car off, i have to wait for another 8+ hours for this to be able to happen again. If I start it sooner there's no white smoke or RPM play. The car cranks instantly, there are no start-up problems. Also the white smoke doesnt smell like oil or antifreeze, just diesel. I went to do some diagnostics - the guy said everything seems fine. Not sure what he checked tho, but he constantly pushed the gas pedal to 4k RPM during the tests.
Any idea what might be causing that smoke?
I read it could be the injectors. But i dont see a reason why they would be dipping inside the cylinder since its a PD - there should be no pressure on the injectors once the car has been turned off. Or am i following some false logic here?
I also read it could be sucking some air into the fuel lines. Not really sure how that could impact the RPM and the smoke.
Since january whenever i start my car after in the morning (or basically happens whenever i leave my car off for over 8 hours), no matter hot or cold weather, i would get huge clouds of white smoke that smell like diesel accompanied by RPM play. This whole thing lasts for around a minute, then the smoke disappears, the RPM get stable. Then, if i switch the car off, i have to wait for another 8+ hours for this to be able to happen again. If I start it sooner there's no white smoke or RPM play. The car cranks instantly, there are no start-up problems. Also the white smoke doesnt smell like oil or antifreeze, just diesel. I went to do some diagnostics - the guy said everything seems fine. Not sure what he checked tho, but he constantly pushed the gas pedal to 4k RPM during the tests.
Any idea what might be causing that smoke?
I read it could be the injectors. But i dont see a reason why they would be dipping inside the cylinder since its a PD - there should be no pressure on the injectors once the car has been turned off. Or am i following some false logic here?
I also read it could be sucking some air into the fuel lines. Not really sure how that could impact the RPM and the smoke.
Last edited: