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Dan, Peter, & Carole, Thanks for the cold welcome. Would have said warm but it appears you're all in a frozen state. Dan, It appears you are getting some pretty cold winter storms in Georgia this year. Happy time for the 4-wheelers and not so much for Jags. Peter, Brummagem? First time I have heard that term. Is it slang or have a hidden meaning? Carole, Palm Springs has it's advantages during the winter. It's averaging 80F here now. During the summer it averages 118F. Way too hot to drive in a convertible. During the summer it stays garaged. I take it out about once or twice a month for a quick spin and it's back in the garage. I have had this car going on two years and have only put on 300 miles. The top stays down all time, I do raise and lower it about once a month. Afraid of the dreadful green shower, so use it sparingly. Spent last summer replacing all the plastic parts on the engine, and next summer will do the suspension. Have always been a fan of British cars, with the exception of Lucas. When Thatcher was PM, she should have declared Lucas a national disaster. Might have helped save the British auto Industry.

Sorry Russ, that should have read "stoichiometric ratio index" which I have since researched to mean the ratio of mass air flow to mass fuel flow, the result then divided by 14.7. Apparently, the ideal ratio of air to fuel in a petrol engine is 14.7 (when hot) and thus if we achieve the ideal and then divide by the constant 14.7 it will end up as 1.0 as an index which the MOT calls Lambda. Less than 1.0 means too little air for the amount of fuel (i.e. rich mixture) and greater than 1.0 means the opposite (i.e. lean). I guess I am teaching my granny to suck eggs for many of the contributors on this forum but I want to air my thoughts of what's going on and invite correction so that I get it right. Good news! I have renewed the upstream O2 sensor on Bank 1 (as per code P1646 description) and all is well! The old sensor was easy to remove (luckily)and now I have sensible O2 readings and the fuel systems go to "CL" (closed loop) mode with active fuel trimming. I have cleared the old code and the MIL lamp stays off. Relief! Got MOT re-test later in week so fingers crossed and will let you know the result.

Oh dear, I may have accidentally ordered a mesh grill and leaper...I was going to leave her absolutely standard but the previous owner added chrome headlight and rear light trims and after seeing Peter's car...