Hi Folks, Sorry to bring this up again, but I have been flatchat at work and only now got to checking items out. The misfire has progresively beocome worse, so here are deatils of what I have done / observed. When cold, you could almost say everything is normal. Once warmed up, the running has progressively got rougher, and now, holding any constant speed results in lots of pops, and the car bunny hopping / running rough. The exhaust is very sooty when idling and does not pick up smoothly when revved (Bogs down). Accelerating through the gears does not show the problem, but the overall power is significantly down on usual. Here is what I have done. Checked Spark Plugs - Seem OK Checked and cleaned all earths - Seem OK Removed Lamda sensor (Very sooty, Cleaned up all contacts and reinserted) - Running without the Lamda sensor connected the car ran really rough, so Not sure if that eliminates it as a problem, or confirms it. Checked and cleaned MAP sensor and ECU connections. I'm not sure how to use EasyMap, so I will google that today and see what to do there. What should I be looking for on Easymap to see if the Lamda sensor or MAP sensor is stuffed? Thanks in advance for advice. Carl