Quote:
Originally Posted by ecp
I have aftermarket headers, and the o2 attaches onto the pipe coming off cylinder 6. i have no o2 codes. I think the cylinder is dead because there is no signal coming off that sensor even after i’ve verified it works. so if there is no combustion happening it would read close to .0v like it is? I pulled cam plugs and verified that the can timing isn’t out since everything lined up with my locking tools from the ims kit.
I’m going to try and see if it is a wiring issue with the o2 circuit, but i dont see how it would just fail out of the blue, but anything is possible i guess. I tried attaching a link to a video i posted on youtube showing how the car sounds and runs but i don’t think it let me post it
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Those O2 sensors should be 4 wire sensors.
On a 4 wire look for two wires of the same color they are the heater circuit.
They should show 12v with key on.
Of the other two one is ground.
The other one is the signal wire back to the DME/ECU
Hope that helps.
I have gone back and re- read your posts in this thread.
In post #12 you stated that the O2 sensor voltage was .04
In post #13 you state it is reading nothing.
In post # 15 you state there is no signal but the voltage is close to .0v
Seems that the bank 2 sensor is working.
These O2 sensors work in a very very narrow range.
You stated you have not gotten any O2 sensor codes so my guess (after re reading your posts) is that the wiring is fine.
You could back prob the harness to sensor connection from the sensor side of the connection and check the two wires that are the same color. you should get 12v or near battery voltage with key on.
If that circuit (heater circuit) is good I would bet that the wiring is good. But that Cyl. may be dead as you stated.
If you think you have a dead Cyl. you can check it with a compression gauge.
Or use a vacuum gauge hooked up to the intake.
The needle will tick every time the dead cyl. comes up on the compression stroke.
Compression gauge will be easier if your not familiar with reading vacuum gauge needle action.
Or as JFP stated water on the exhaust for that cyl.