can your software graph the table for you
can you post screenshots of both
the shape looks okay but the values are odd for just a 10% correction
try selecting all the cells in the table and 'copy' then paste them here, both old and new table
you probably did a massive over correction
how did you do the math per-cell ?
I let HP tuners do the math. Lets assume your theory is correct, the math was done wrong, and a massive over correction has been done. If that happened I would think my trims would now be way off, not close to perfect. What I really want to understand with my question is how or why the narrowband 02 sensor could be lying to me.
Thanks
Roy
oh okay
im not sure your sensor is lying, but narrowbands lie because:
- they are too cold
- there is wiring damage
- there is interference on the wire (like an arcing plug wire next to the o2 wire)
- there is an exhaust leak before or maybe shortly after sensor
- the sensor has failed due to:
- age
- physical impact
- heavy carbon deposits
- poisioning:
- lead
- silicone
- weird fuels and additives like octane booster
the switching pattern of your o2 sensor (graph the voltage) can be quite revealing regarding whether the sensor is okay or not
Thank you Steveo, I dont think any of those apply but I am going to find out. I will try to get some time this week to set up my wideband on this truck and see if the AFR is actually not what the o2 senors say it is when in MAF mode. Do you have any other suggestions as to why it would run fine on the MAP sensor but run badly on the MAF sensor, both while showing acceptable trims? No trouble codes. Thanks, Roy
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