0.2 Bars pressure without engine running.
I saw a video last night on youtube, reviewing an Alfa 159, Without engine running, there is no pressure on gauge, but in my car, if I turned the electricity on, pressure gauge climbs to 0.2 bar. I checked the pressure sensor on the inlet manifold, cleaned it, but still same. Does it get the pressure value from somewhere else ? Also after I cleaned the sensor with low pressured air gun, car runs good, but at lower rpms, car doesnot want to run smooth, Its like waving the throttle, so I have to give more throttle to make it smooth. I press like %5-%10 more. And It started to give visible black smoke -( I mean clouds like ) from the exhaust, when heavy load, or heavy acceleration. So, what should I do,
PS: I realised also when I travel at 100km/h, I get my foot off from the acc pedal, but car says Its is burning 2lt/100km still. Is it a problem?