Need help with diagnosing knock sensor causing problems.
Most noticeable when going up long hill in 6th and revs at approx 1350 and trying to accelerate moderately. Car seems to misfire once and then I back off throttle and accelerate at a slower rate.
P0327 - Knock Sensor Circuit Low Voltage
P0332 - Knock Sensor 2 Circuit Low Input (Bank 2)
P0300 - Engine Misfire Detected
Disconnected battery, drove 10 miles and idled for 10 mins, took out ECM fuse...no difference.
Any tech help appreciated

Who did you give your LS6 engine to? :alchi:

Bad or intermittent 02 sensor can cause one bank to misfire. If Derek can't provide what was replaced I'd start there with a water car. :)


Norm

Somewhere in the codes it did say mention bank - but not anything about 02 sensor? I'll check with Derek, I'm looking for the checklist/procedure to diagnose using mm, patience and cold ones....

When its specific to one bank of cylinders the easiest way to trouble shoot is to swap stuff from one side to the other. Low voltage and low input could be just a bad knock sensor, burnt wire, or something totally unrelated like an o2 sensor. I would try switch the positions of your knock sensors, reset the ECM and see if the problem switches banks. If it does the replace the bad sensor. If it don't then try swapping the o2s. That don't work you could try check the spark plugs, maybe for some reason there is a lean condition on one bank.

Jon

Thanx for help & tips. The KS are located just behind the engine mounts (ls2) not under the intake (ls6). They are both one-wire, light blue. I've gone into the service manual and will try some resis, volts ...etc tests and try those.


"OK, who's the U-boat commander?

A A I I I C

One of the KS resistance to ground is out of spec. Checked from the two pin harnss at back of engine to ground -- one 107 Kohms (max spec and one 121Kohm(over spec). I hope it's the one wire harness down to the KS cause changing one of the KS's looks hard to get fingers in there to do...