V12 harshness diagnosing
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V12 harshness diagnosing
My 90 XJ-S V12 is nice and smooth LacedMy 90 XJ-S V12 is nice and smooth when cold and pulls well. When warm it when cold and pulls well. When warm it doesn't idle as well, does not pull quite as doesn't idle as well, does not pull quite as strong and gets harsh from 3000 rpm. I strong and gets harsh ftom 3000 rpm. I do not want to change parts willi nilli. do not want to change parts willi nilli. What are the best way of diagnosing for What are the best way of diagnosing for an owner without the really dpecialised an owner without the really dpecialised tools? I replaced coils, rotor, cap, plugs tools? I replaced coils, rotor, cap, plugs and plug leads a couple of years ago. The and plug leads a couple of years ago. The O2 sensors are original. O2 sensors are original. From the above my money is on From the above my money is on overfuelling? Would that have such an overfuelling? Would that have such an effect? How do I diagnose this with effect? How do I diagnose this with simple tools? simple tools?
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FS[Western US]: XJS V12 Convertible
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09-29-2015 12:41 PM
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