Chain rattle in engine but no trouble codes

[CoreyKiddVZ]

And I don’t believe I can unplug injectors 1 at a time as the plugs are under the intake manifold and I will have to take that off to get to the injectors

 

[Immortality]

Too true. Bloody alloytec engines...

If O2 sensors are really bad then they could potentially cause rough running issues. Could also be a sick injector or poor ignition. Actually -25% stft means it pulling out fuel. So either poor ignition or stuck open injector.

 

[CoreyKiddVZ]

Spark plugs are new. May be a bad coil pack. I’m gonna look into injectors tomorrow. I’m guessing because bank 1 is richer, the (stuck open) injector May be on the drivers side. I’ll look into it. Thanks for the help. I’ll keep you updated