240 Not Running 100%

[Nismo_Freak]

Alright... motor just isnt running 100% I dont think... heres what I got.

Numbers:

Ran Codes... came up with Primary 02 sensor and something else123k on the clock ...167 167 162 167 compression - motor is cammed so it will read lower psi at the cranking RPMJust replaced primary 02 sensor... then the secondary fell out! Secondary 02 fell out causing a nice hole in my pipe. Pulled Plugs and they are grey (overheating plugs ?)

I have the following:

Stillen Cams 245 duration / .390 lift Custom 2.5" Exhaust with straight through MufflerHotshot HeaderInjen Intake w/ Extension (clean filter) Weapon R Fuel Pressure Regulater (43 psi idle - 53 psi WOT) Random Tech Hi-Flow CatNew Primary 02 SensorAdvanced Timing (4-6 degrees) NGK Plugs (fairly new) Secondary Butterfly Removed

[PabloHoney]

Umm...replace the secondary O2 sensor??? I thought that would have been a given. If your secondary O2 sensor is telling the computer that it's not getting the right kinda air, it's gonna mess with how the engine runs, but you probably all ready know that considering the mods you have done.

[Nismo_Freak]

Plugs, yeah looked them up in the Faq... as for the secondary the fitting misthreaded so im screwed until meinike puts it back together and gets me a new secondary 02. The other code was for Evap. Core... when it wasnt on the car.

[Aries]

Once you get it back, change your plugs and go drive the car hard. Come back and pull #1, and #2.Since the motor fires 1&4, and then 2&3, you will be able to tell if you are having a fuel problem or if it was simply the O2 problem from this weekend.Either way, it will let you know exactly what's up with your motor.