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P0263 INJ Cylinder #1 contribution/balance Power cylinder, valve train or injector
Already had the injector replaced but maybe I also got a bad rebuilt injector . Have been told that engine needs to be replaced but was hoping that I can still fix it without replacing the engine thanks in advance
 

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I have no first hand knowledge on this one, but I believe it was stated here (by TKO, I think) that failing injectors seldom throw codes but a bad FICM may throw injector codes. You might want to look at that.

Also, of course, make sure the injector harness is not damaged and all of the connectors are plugged in tight.

Before engine replacement, it would be nice to know what is wrong with it, compression issue or???
 
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