I have had the injectors cleaned at the shop 2 X, replaced the fuel filter, cap and rotor, wires, plugs and still no success. The codes change constantly the only one that stays consistent is the fuel injector on cyl. #5. Several of the plugs get such a white deposit built up on them that the entire plug end is covered - no spark. This occurs over short periods of time. No one has answers except pay me money to clean the injectors!
Other symptoms - the idol is inconsistent, when stopping the vehicle tries to lurch forward, when starting or setting the idol will periodically jump from 1000 to 1500 the vehicle smells like unburnt fuel. When you step on the gas there is no hesitation it has plenty of power - holding it back seems to be more of the problem.
It has 135,000 miles, 4X4, 350 vortec
any help would be greatly appreciated