Injection problems

Injection: It refers to the fuel injection, which is the system through which the fuel is rationalized and then enters into the engine.
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Engine light comes on at 75 mpg, doesnot run rough

Chevrolet Silverado 2006 pick up  65000 miles
The light comes on at 75 mpd, code P0300, changed wires, air filter, added fuel injector cleaner(twice), runs fine, no change in performance. What else should I do? or not worry about it?
Kurt from United States 8 years ago  
KU
8 reports 
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