SM105K
Streetlight Grand Prix Champ/ IG @fafomotorsports
New o2's are in the car. What a pain in the ass for the front two. It tried my patience but I got it done. Couple of things to help you if you decide to change yours.
You will need a 7/8 or 22 mm combo wrench, dikes, and 3 foot shoe string.
The front sensor is easier to get too if you loosen the 3 bolts on the turbo heat shield. I actually cut the wires on the my old ones so I could get my box end around the sensor itself. You will not be able to remove the shield completely, I just worked around it.
For the rear sensor, it is accessible by removing the passenger side tire. Use a jack stand, safety first. I cut the wires again and got my box end around the sensor and removed it. I lowered the car on the jack, and took off the engine cover. I reached into the engine bay and un-clipped the wiring harness from the stud on the engine and then un-clipped the o2 connector clips from the mount. If you look at your new o2 sensor you will see the clips for the mount. Since the wires were cut, I pulled the harness up and unplugged it.
I installed the new o2 sensor. This is where the shoe string comes to play. I made a slipknot (not the band) and fed it down through the engine compartment to where the o2 sensor connector is. I looped it around the connector and pulled it up to where it connected and tied it off so it couldn't fall back down. From there I connected the harness and 02 connector and mounted them in the correct place. I unlooped the shoe string and it was done. Two hours later mixed with some colorful language, I am pretty sure my neighbor thinks I have tourettes.
Hope this helps.
I then went and ran some logs for Brad for some finalized tuning for the dyno. On my 1st-4th gear pull she was riding! At the top of 4th gear (yeah I know, save it for something who cares) I heard an interesting sound. Sounded like something let loose and was dragging. I instantly thought side skirting...but nope. Damn skid plate came undone. Grr....now I need to go buy some new clips and reinstall it. So yeah. Fun.
Intercooler works damn good. I am seeing 20 to 25 degrees over ambient at the manifold. Also my car is having trouble holding more then 15 psi of boost. It keeps tampering off in the high rpms, even with the gates at 100%. So maybe the turbos are getting tired. Going to talk to my turbo guy and see if rebuilding them and adding a set of billet wheels is worth the money. Dyno runs tomorrow at 9 am.
You will need a 7/8 or 22 mm combo wrench, dikes, and 3 foot shoe string.
The front sensor is easier to get too if you loosen the 3 bolts on the turbo heat shield. I actually cut the wires on the my old ones so I could get my box end around the sensor itself. You will not be able to remove the shield completely, I just worked around it.
For the rear sensor, it is accessible by removing the passenger side tire. Use a jack stand, safety first. I cut the wires again and got my box end around the sensor and removed it. I lowered the car on the jack, and took off the engine cover. I reached into the engine bay and un-clipped the wiring harness from the stud on the engine and then un-clipped the o2 connector clips from the mount. If you look at your new o2 sensor you will see the clips for the mount. Since the wires were cut, I pulled the harness up and unplugged it.
I installed the new o2 sensor. This is where the shoe string comes to play. I made a slipknot (not the band) and fed it down through the engine compartment to where the o2 sensor connector is. I looped it around the connector and pulled it up to where it connected and tied it off so it couldn't fall back down. From there I connected the harness and 02 connector and mounted them in the correct place. I unlooped the shoe string and it was done. Two hours later mixed with some colorful language, I am pretty sure my neighbor thinks I have tourettes.
Hope this helps.
I then went and ran some logs for Brad for some finalized tuning for the dyno. On my 1st-4th gear pull she was riding! At the top of 4th gear (yeah I know, save it for something who cares) I heard an interesting sound. Sounded like something let loose and was dragging. I instantly thought side skirting...but nope. Damn skid plate came undone. Grr....now I need to go buy some new clips and reinstall it. So yeah. Fun.
Intercooler works damn good. I am seeing 20 to 25 degrees over ambient at the manifold. Also my car is having trouble holding more then 15 psi of boost. It keeps tampering off in the high rpms, even with the gates at 100%. So maybe the turbos are getting tired. Going to talk to my turbo guy and see if rebuilding them and adding a set of billet wheels is worth the money. Dyno runs tomorrow at 9 am.
Last edited:
