2000 S70 Replaced Cam Seal, now P0141 and P0304 Topic is solved

[tfowler11]

Removed timing belt to replace front cam seals, used locking tool and had to deal with VVT. Broke a vacuum hose while doing it. The hose was from under injector cover to I believe temp sensor on intake air after MAF and before ETM. After putting back together car would start then die, no codes. Would run if MAF was unplugged, repaired hose now will idle with MAF plugged in but very rough, smooth when driving around block. Getting P0141 from O2 sensor and P0304 from a misfire on cylinder 4. Could I have fouled plug or o2 sensor test running it without MAF/broken air hose? I'm worried I bent a valve or burned one. Anything else I should check?

[tfowler11]

Update for anyone in the future, took plug #4 out looked ok, wiped it off a bit reinstalled and no misfire now. Cleared O2 sensor code and rough idle went away. Pending code comes back but if I clear it after warming up and driving a bit it doesn't come back until another start. Going to check wiring continuity and maybe take out O2 sensor next.

[abscate]

Heck the #4 fuel injector plug, maybe it dislodged during hose service

[tfowler11]

Somehow the O2 sensor was unplugged while working on hoses and intake, that took care of the P0141. The P0304 was taken care of by a new spark plug, old one had broke and the central electrode moved back and forth. No codes now and smooth idle!