corrado-ek 10 Posted January 9, 2014 Hello, When i unplug my O2 sensor/lambda sensor the car runs perfect, when i plug it back in it gets horrible. No stable idle, chocking and unburned fuel (black smoke) in exhaust. (O2 sensor is new, Brand : BOSCH) Quote Share this post Link to post Share on other sites
corrado-ek 10 Posted January 10, 2014 Changed vac hose to ecu, much better at idle now but still black smoke when i hit the throttle Quote Share this post Link to post Share on other sites
