Can anyone help me. The 'Toxic fume monitoring warning light' has come on and stayed on.The car is very chuggy and seems to be mis firing from the exhaust. I have checked the coils by taking the lead to them off and seeing if the engine runs any different. I also have a set of brand new coils which i have fitted but this has made no difference. Can anyone give me any advice on what the other problems might be??? Somebody said spark plugs but i dont want to change them if there not needed.