There are sensors all over the engine, transmission, exhaust, axles, etc.
ETC = eletronic throttle control
.001 inches. Makes a difference depending on what you are shooting, how old the barrel is, etc..
Usual locations - dealers, classifieds, eBay, Craigslist, etc...
Condition, caliber, etc.
Pop off the engine cover and air cleaner assembly. It's right on tophttp://ahanix.org/etc/dodge/engine-rebuild/100_0263.JPG
The "bus" is the communication system for the computers on the vehicle. "no bus" means that communication is not happening. It could be a computer, wiring, fuse, ground, etc issue.
Need a DETAILED descripton of ALL markings, caliber, stock, sights, caliber, barrel length, etc..
Depends on the caliber, type of barrel, whether it is on a handgun or rifle, etc..
Caliber, maker, serial number, proof marks, etc..
Shotgun with buckshot, 30 caliber rifle, etc.
Usually, 'cluster', refers to the instrument/gauge cluster or instrument/gauge panel that the driver looks at, containing the speedometer, fuel gauge, etc.