**I posted this over on the HPTuners forums, but Im not getting much of a response there **
I am having a little trouble w/ my car. Its a 97 2.4 cav.
When I am using the VCM Scanner w/ the car running- the factory 02 sensor voltage stays at the bottom of the meter. It barely moves...
I beleive this is causing my car to run super rich when in closed loop mode, It thinks the car is extremely lean, so it just dumps fuel to compensate. The only way I can get the car to idle half decent is to run it in open loop mode and play w/ the idle VE table...
The only time I notice that the voltage on the meter actually moves is when I am driving the vehicle.. And even then, it doesn't move up and down- it usually just kinda sits near the top of the meter..
I originally had a heated o2 sensor from caspers in there, and I thought this was the issue, but after I installed a new OEM sensor, it does the same thing...
I was told by an experienced HPTuner that the meter should be constantly moving up and down at idle and this was my issue w/ the car running extremely rich in closed loop.. I also have a o2 simulator installed for the secondary o2 sensor- are they known to cause problems?
On second thought, i may have mixed up the open & closed loop parts.. If the above statements don't make sense- just flip flop those words..
Thanks for any information!!
-Marc
BROUGHT BACK FROM THE DEAD!
i'm having the same problem with my 02 sensor not reading yesterday when we tried to tune...it's just flat, i put a new sensor (delco) and still the same problem...we scanned it and it says there's a o2 sensor problem (can't remember the code off the top of my head, but it's the header o2), but i'm not getting a CEL, we are stuck on what the problem is....any idea's?
also having a problem is says the "OS doesn't match the vin so i'm unable to purchase credits for this vehicle", any ideas on that? this would be the most helpful...and much appreciated.
Edited 3 time(s). Last edited Tuesday, July 22, 2008 9:34 AM
"If you have no clue what's going on... STFU!"
mike thompson wrote:BROUGHT BACK FROM THE DEAD!
i'm having the same problem with my 02 sensor not reading yesterday when we tried to tune...it's just flat, i put a new sensor (delco) and still the same problem...we scanned it and it says there's a o2 sensor problem (can't remember the code off the top of my head, but it's the header o2), but i'm not getting a CEL, we are stuck on what the problem is....any idea's?
also having a problem is says the "OS doesn't match the vin so i'm unable to purchase credits for this vehicle", any ideas on that? this would be the most helpful...and much appreciated.
Ok what all steps did you take to tune your car?
Reason I ask is if you follow Shifted's sticky and disable closed loop the sensor is not going to read right (which is not a issue). The O2 sensor comes into play when the car is in closed loop.
FU Tuning
is says the "OS doesn't match the vin so i'm unable to purchase credits for this vehicle", so as for tuning we got nowhere it wouldn't let us....this o2 is reading this when we were just looking at everything...it lets us look just not change anything because of the problem above..
"If you have no clue what's going on... STFU!"
