Hmmmm... well their are a couple of things that could have done this for you... one is the fuel pump low pressure diaphram... here the un-metered pressure is going to drop down a little... and cause you to lean out a bit... but, looking real close at the fuel flow/pressure guage you should have seen a change... another item is a plugged injector on the side... that was runing lean... and while you said that the spark/mags were checking out ok... you could have had a plug that was fouled...out in flight... but, the fact that the egt is reading high... and the oil temp is high indicates that your running lean... on that side.... or both... first to check the fuel system... check the gas corolator... and make sure its not leaking .... air in... not fuel out... when was the last time it was serviced... you might want to use a new set of o rings and clean it and check it out at the same time... first... as any air leaking into it... is going to make the engine run lean... its located in the wheel well and it is/has been a source of the rear engine runing hot... if it leaks air in... while its good enough to keep the fuel from coming out... look for the tale tale gas stain.... on the top where the pull rod goes in and around the body where the cup goes up into the housing...
what to check.. check for gaskets leaking at the intake.. check for the rubber connection hoses to be leaking... air in... check for cracks around the intake pipes... check for leaking spider tubes and their fittings from the top fuel distrubutor... and then remove the injectors and clean them... thats about as far as you can go... without them mechanic doing the next items... on the fuel system... to check...
now for the bad news... it could have been a valve hanging up... and you were leaning out the mix especially if it were a intake valve.. that was sticking... and a person who can test to that is Skyking... he knows what you should put in the oil to get them un-stuck... but, its not a avation product so I can't recomend it... smile... you didn't mention what type of oil your runing... but, anything less than aeroshell 100w is not good... at them temps... if its a valve... you can do a comprssion check... or pull the engine thru and you should feel the cyc that is leaking or the valve is sticking open... probably a intake... if it is...
Ok... let us know what you find out... G.M>
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