after having my 4g64 rebuilt after a spun bearing i spun a bearing again... after less the 300 miles... so long story short i was driving my car when all a sudden my car acts like it doesn't want to boost.. and a engine check light comes on, i also heard some noises coming from my lifters. i ended up parking it and letting it sit for a couple of weeks after sitting for a while i did an oil change and replaced the lifters. the original CEL code was a P0340. so while i was taking taking the car for a test drive the oil light cam on so i instally turned the car off and when i tried to re start the car it started to knock. after talking to a mechanic he told me that the cam sensor was at falt.. can anyone shed some light on my issue