P0304 code; ecm replaced

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sdhow

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After new timing chains, sensors, solenoids, coils, spark plugs, etc, I cleared all the codes and then got an intermittent P0304 code. I then pulled the injectors and replaced #4, then even took it to the dealer and had it diagnosed...and they told me it was the ECM. After another $1,200 ($650 for the computer and $500+ to have it diagnosed and flashed), it still throws the same code and intermittently idles rough. No issue under load.

It is flooding the #4 cylinder and I'm getting gas in the oil. The service manager looks at me stupid and wants to pull the head...at my expense, of course.

Any thoughts?
 

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