Leaded/Unleaded

[martin at mgass.demon.co.uk]

Anybody have ideas on the consequences of the following actions  ?:

a) On a GM vehicle, 2ltr 16V, ECU,  CAT, EGR, knock sensor etc.
   Removing the CAT and running on Leaded fuel (higher octane rating).
  Would ECU be able to tell ?, would any sensors (eg lamda) get 
damaged ?

b) At some later time reverting to unleaded then replacing the CAT, 
after allowing a suitable time/mileage to 'flush' out any lead 
deposits.

c) What would be a suitable time/mileage...i.e. how long would any 
lead deposits linger in the engine ?

Martin
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martin at mgass.demon.co.uk
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