I have a 2004 4.7L Tundra. I have some issues with the Knock Sensors. I've tried all I could at home without pulling the engine apart. I think its time for the dealership to rip me off,I mean rip the intake manifold off and change the knock sensors or tell me what's wrong with the engine. Truck runs great until the CEO comes in. I've had the truck at the dealership in 09 for this problem and they changed 4 O2 sensors and 2 CATs.... Still have the knock sensor code.
So my question is... While they have the top of the engine apart, what else can I have them do... Gaskets, knock sensors/wires, and.... Truck has 140k and I hope for it to be my weekend toy for many more. Any suggestions of proventative maintenance to get the most out of the labor costs?