Hm.. I've downloaded some Uno manual and it covers mono-jetronic engines as well. So my question: how do I know, if the engine coolant temp is ok (I think that is the blue conected one on intake manifold). I'm still trying to solve the problem, why is car tuging in low rpm. I've changed distributor cap and the spark should be fine now and accelerations are good. When engine is hot, IDLEing becomes little variing (800-900,800-900) RPM. Since air/fuel mixture is automaticly ajusted, I read that malfunctioned sensors can cause troubles. I've measured lambda probe and values were between 0.2V-0.8V changing every second (I think that's ok). Which ones sensors can I check more? If I disconect coolant temp sensor, engine won't run. So how do I know, if it's OK ? What can couse car tuging in 1. and 2. gear, when RPM are between (1000 and 2000 ) ? It seems like there is not enough power, when I put the foot of the throtle in 1. or 2. gear. Otherwise, car goes like a jet