RocketBird

Hey guys so my LS1 firebird was leaking pretty bad so I decided after 3 years to replace my oil pan gasket, i dropped the K member on a rotory lift & supported the engine with a under hoist jack & placed it on the crank balancer. When i got done i filled it up with oil & spilled some of the oil on the headers so i sprayed brake clean on the headers. I’m using 5w30 synthetic valvoline oil & after a short drive it started missing really bad & it never stopped after 4 DAYS! my oil pressure gauge doesn’t work so I’m using a “CTS insight digital gauge” to monitor my cars rpm, speed, engine temps etc so idk if my oil pumps is going bad or it’s something wrong with the wiring engine light has been on a while & it’s showing P1133 O2 sensor code but the O2’s are 2 years old 🤷🏾‍♂️ The car is modified with cam, exhuast injectors etc.

PLEASE HELP

RPM WS6

iTrader: (3)

I'm not exactly clear on one point...did this misfire start immediately when you fired up the engine for the first test drive (after reassembly of the pan), or did it not start until the end of that drive? In other words, did it ever run properly, even for a short while, after you put it back together?

jetech

Do you have access to a live data/graphing scanner? If the MIL has been lit for a while you probably have a B1S1 bad O2 sensor.
see this

RocketBird

I think i do I’ll have to check it out. How do i know if O2 sensors are bad with a multimeter?

RocketBird

the misfire started once i cranked it up. Before i did this job it was running great

jetech

O2 testing w/VOM Maybe wires or connector in the O2 circuit were damaged while performing the work?

RocketBird

Nope but it has oil on it bc of the oil leak but i cleaned it off

jetech

If it is missing really bad you should have a DTC P0300 or a specific cylinder DTC. Not just a O2 dtc