P0305 and P0303 after new O2s installed

[ensign83]

Ordered oem back O2 sensor from PP, and after careful installing I have a rough idle and misfires,

my new=to=me '07 2.7 w/ 81k miles is missing and stumbling after warmup. I've only had it a month, and replaced O2 downstreams on both banks iaw P0431, only got worse...


Now get P0305, P0303, and P0300, and got blinking CEL as I got home and shut her down.

Gonna check plugs and coils even tho posters say it is rarely that; I was careful putting those new oem Bosch downstream O2 sensors in. Dirty Maf? If plugs look fine, what is usually the next suspect? Tank is half full of Shell V-power. Oil Level is at the top, above the upper thin line marker. I do not see a lot of smoke after warmup. I searched the forum, but this seems strange for a coincidence...

VVS Vanos, variocamicon solenoid, Valve lifter solenoid all mentioned here; are they the same thing, that 9A1... part#?
Should I replace the 9A1... sensors, or punt and tow to the busy indie, missing Xmas at Mom's?


Thanks for any input! Otherwise I love this Cayman...

[bell]

You need to see what the fuel trim adaption is doing, if it's adding fuel and going out of range them it is most likely a vacuum leak.....
Do you have a way to scan and look at live data?
Chances are your old o2s are fine. ...

[ensign83]

Drained ~2 qts before level got to high mark.

Removed cover and saw mostly dirt; haven't checked a plug yet and it's chilly.


Look for oil in the MAF area and intake next?