Originally Posted by ExeterAlfa
It has recently failed the MOT on emissions - high CO2, high lambda and high hydrocarbons. When it has been on a long run, there is a smell not unlike an open can of paint... Any ideas?
I think you mean CO as opposed to CO2. CO is Carbon Monoxide, CO2 Carbon Dioxide.... Can you confirm?
CO is uncomplete burning of hydrocarbons, due in part to lack of oxygen, timing or incorrect air/fuel mix.
High Hydrocarbons is unburnt fuel... due to fuel being released unburned.
High Lambda is one that gets me though... I think that it measures too much O2 in the exhaust as heing 'high lambda', and too little as being 'low lambda'.
So, Having a lot of unburnt fuel in the exhaust may have caused damage to the CAT, check this. Also check for leaks in the exhaust as this can cause high lambda readings (but noyt the cause of the fuel problem). The cause of the rich/unburned mix could be blocked air filter, AFM not reading air flow, or air thermometer faulty.
After that, plugs and lambda sensor are suspect...
The squeeling when turning lock to lock is the power steering pump under pressure. Ignore, it's nothing to wory about!
Could the bearing be gone in the offside rear? Otherwise, check the wheel for kinks and also kinks on the disk. One way of doing this is to start rolling downhill slowly, and pull-up the hand-brake slowly, see does the car jolt.