Drivers side o2 going nuts.
Drivers side o2 going nuts. My Driverside o2 B1S1 is all ove at idel. The passenger is flat at 700ish but the drivers is all over. I assume this is the engine missing?
I did a comp test, all at 155 on that side. New plugs, pulled each wire while running and got spark. Ideas?
Also at idle the Advance is all over, from 10-20.
If an injector is plugged will the computer throw a code?
How can I test for an injector?
I did a comp test, all at 155 on that side. New plugs, pulled each wire while running and got spark. Ideas?
Also at idle the Advance is all over, from 10-20.
If an injector is plugged will the computer throw a code?
How can I test for an injector?
Normal behavior in closed loop.
Not normal behavior in closed loop. There's a problem in that bank.
Are you holding the throttle wide open while spinning the engine during your compression test?
Run the test on your passenger bank, WOT. Read the plugs while they're out, use your Ohm meter to test resistance on all 4 plug wires, and report back.
Jumping around a few degrees is normal, but I've not seen a PCM config with 10deg advance anywhere in the idle area.
Most laptop scanners can read the Cylinder Misfire History data for each of the 8 cylinders, that might narrow things down.
With the O2 sensor flat-lined at 700mV, it's more likely you have a cylinder not firing at all. Either due to ignition problem or stuck-open injector. Also possible the sensor has failed, but I usually see them stuck at 0.xxx mV (electronic failure) or ~950mV (coolant contamination).
Run the tests above and let us know what you find.
Not normal behavior in closed loop. There's a problem in that bank.
Run the test on your passenger bank, WOT. Read the plugs while they're out, use your Ohm meter to test resistance on all 4 plug wires, and report back.
Jumping around a few degrees is normal, but I've not seen a PCM config with 10deg advance anywhere in the idle area.
With the O2 sensor flat-lined at 700mV, it's more likely you have a cylinder not firing at all. Either due to ignition problem or stuck-open injector. Also possible the sensor has failed, but I usually see them stuck at 0.xxx mV (electronic failure) or ~950mV (coolant contamination).
Run the tests above and let us know what you find.
Not normal behavior in closed loop. There's a problem in that bank.
Pulled the injectors and dropped them off at a test/clean company.
Are you holding the throttle wide open while spinning the engine during your compression test?
Yes, it's a boosted car so thats the lower compression.
Jumping around a few degrees is normal, but I've not seen a PCM config with 10deg advance anywhere in the idle area.
It was HP tuned a few years ago if that matters on the advance. A stuck injector may cause the o2 to change advance?
Most laptop scanners can read the Cylinder Misfire History data for each of the 8 cylinders, that might narrow things down.
I have HP tuners and just started using it, will that read misfire history?
With the O2 sensor flat-lined at 700mV, it's more likely you have a cylinder not firing at all. Either due to ignition problem or stuck-open injector. Also possible the sensor has failed, but I usually see them stuck at 0.xxx mV (electronic failure) or ~950mV (coolant contamination).
New o2.
I assumed the fluctuation was the bad side and checked for spark, all was good. I didn't check the other side but will after work.
Side note, I have a WB o2 on the side that you guys say is wrong. It was reading rather high 16. I did just install that sensor though so I can't say how it compares. If a stuck injector would that side read rich and not lean, or would this lead to a not firing cylinder.?
Thanks
Pulled the injectors and dropped them off at a test/clean company.
Are you holding the throttle wide open while spinning the engine during your compression test?
Yes, it's a boosted car so thats the lower compression.
Jumping around a few degrees is normal, but I've not seen a PCM config with 10deg advance anywhere in the idle area.
It was HP tuned a few years ago if that matters on the advance. A stuck injector may cause the o2 to change advance?
Most laptop scanners can read the Cylinder Misfire History data for each of the 8 cylinders, that might narrow things down.
I have HP tuners and just started using it, will that read misfire history?
With the O2 sensor flat-lined at 700mV, it's more likely you have a cylinder not firing at all. Either due to ignition problem or stuck-open injector. Also possible the sensor has failed, but I usually see them stuck at 0.xxx mV (electronic failure) or ~950mV (coolant contamination).
New o2.
I assumed the fluctuation was the bad side and checked for spark, all was good. I didn't check the other side but will after work.
Side note, I have a WB o2 on the side that you guys say is wrong. It was reading rather high 16. I did just install that sensor though so I can't say how it compares. If a stuck injector would that side read rich and not lean, or would this lead to a not firing cylinder.?
Thanks
I use EFILive so I'm not sure if HPT has it, probably does. Should be 8 PIDs you'll want to scan, one for each cylinder. Make sure and get the History one, not the Current one.
