not really a solution, but i know cylinder 8 is the most common failed injector, i know this from experience!
i know from word of mouth, i wouldnt drive it with a bad injector, could hydrolock and blow the motor
Originally Posted by firefighter317
P0284 is for cyilnder 8 contribution/balance fault. P0284 can be caused by bad rings, failed injetor, valves, push rod, rocker arm bolts, or connecting rod. Did the mechanic do an injector "buzz" test (electrical test)?
injector buzz test are what the dealer can do to test if the injectors are any good, individually narrows the problem. takes the dealer 1 hour, but must be done when the motor is 100% cold.