Help! Took the sled (2009 Tundra LT V800) for a drive and the exhaust became red entirely in only a couple of kilometer not pushing it. I did change the muffler on it since I was also having problem leaving the sled on idle and not shutting down. The muffler really help... Seem to run better now and easier to start but as soon as I drive it the muffler turn red completely... Check the spark plug and one of them as gaz on it. Put new spark plug to see and it does the same thing...Spark plug turn more black then brown like suppose too and one of them as gaz on it... I did check for a blocage somewhere in the exhaust system can't find nothing wrong. I do have the manual for the sled but there is no instruction on how to do a compression test only a leak test and I don't have the proper tool to lock down the camshaft to perform that test...Is there another way to lock the camshaft without the locking tool? What could be my problem here? Beside that sled seems to run fine.