installed LGM longtubes, getting 135 and 300

[thealf]

im in a 2004 Z06, got the LG Longtubes installed, using the front O2 sensors for the fronts (not the rear sensors, like on the 2003s), got left going to left, right going to right (not crossed, like original), and now im getting the P0135, and the P0300. 135 is bank 1, sensor 1....front sensor, drivers side... checked the OXY SEN fuse....its ok... ive been messing with this since january, and have NEVER gotten my CEL to stay off...sent the PCM in to lou for LS1EDIT THREE SEPERATE TIMES, but im still having problems. anyone got any ideas?

[rwj383]

P0135 is O2 heater circuit B1S1
P0300 is misfire detected

There is nothing wrong with your PCM. If you're sending it to LGM due to these codes, you're wasting shipping $$.

You need to run a scan and record a datalog of a few sensors to see what is up with these codes. For the O2 sensor, you'll want to watch to see if it is sufficiently switching and operating correctly. Likely you will find all is well, so possibly you pinched a heater wire or the O2 is not grounded well. Try to tighten it a little more in the header O2 bung.

For the misfire you will want to view misfire per cyl to see if you actually have a real misfire event. If just random misfires throughout, you will need to desensitize your misfire detection in the PCM.

Robert http://www.gen3motorsports.com

[nuke61]

Question... did you use a copper or nickel based anti-sieze when you put in the O2 sensors?

[thealf]

now that is something i dont know...what would a copper or nickel based anti seize do for me?

[rwj383]

Using standard anti-seize on our O2 sensors can act like a dielectric or an insulator and keep the chassis of the sensor from properly grounding to the headers. So, a more conductive anti-seize with Cu or Ni in it would affect a good path to the header.

Robert