Like it says, from time to time usually when I romp on it to pass cars *past 4 times now* I get that lil fancy orange light with a P0336 crankshaft position sensor A circuit range/performance. The truck had the CPS replaced once b4 I bought it by the previous owner *friend* for the same problem and it still rears it ugly head. But I clear the code with the Smarty and it stays clear until whenever it decides to throw it again. From time to time it does sound what I think is timing rattle down low in the rpms and at idle. Any insite on this, its starting to get alil annoying.