Check Engine Soon :(

[Patton]

Hey Fellas,

Just got back from over seas, stored vette (94 ZR1) by the book. She sat for 8 months and initially after I brought her out of hibernation there were no problems at all. Alittle sluggish at first but what woman wouldnt be after 8 months of neglect! So anyway, the problem started about a month after my return. The check engine soon light poped on, and limited my revs to 3000rpms. I went straight to a dealer and the dealer pulled these DTC's 0031 - CAM Sensor Circuit, 0056 - Secondary Inlet Valve, and 0061 - Port Throttle.
So, the mechanic tells me he is scared to death of LT5s and wont touch it any further, he was the resident vette expert. Is this something i can fix easily by maybe replacing a relay somewhere and this guy just didnt know it? Has anybody ealse experienced this problem?? The engine runs totally fine otherwise but I can definetly notice that it isnt at "full" and the 3k rpm limiter is very annoying but kind of nice now that milk is cheaper than gas. I went from 12mpg to 18mpg average. Any help would be greatly appreciated!!!

By the way, anybody know a mechanic in the Sacramento area that works on ZR1s?? If not I need to buy some books and have some serious studying to do before i go tearing plenums off and whatnot. Thanks abunch in advance!