can some one please list all the thing which make a c20let ignition timing retard or make it run lean............. my cavs still not running right ive got oil in the water but no cylinder leakage and no exhaust gas in the header tank which indicates a pourous head, but this would not effect performance would it ?? also ive just got my turbo back from AET and they told me oil was blowing past the seals due to pressure build up (it was a brand new turbo) but ive checked all my breathers are clear and the oil feed and return are also A1.
I have replaced
turbo (SEE ABOVE)
hot start valve
engine temp sensor
i only use esso super
it just doesnt sound right and my exhaust gas temperature gets dangerously high when making it pull although air fuel readings are just touching in the red by two bars its normal also the closed loop is working as the guage reciprocates therefore lambder is ok, ive got no fault codes stored, no one knows what the problem is but i know my engine and it just doesnt sound right it sound if its retarding off but i have no idea why????
also if anyone has a cos cast head for sale please let me know.
any help would be greatly appreciated, im hoping someone can help give me ideas with logical explanations cos i cant afford to just keep replacing things as ive just bought a house (doh!).