1 lambda=14.7afr
The combi valve only works at cold start. Are these fueling issues only at cold start and idle or when driving around? If the combi valve is shot, it's shot. Replace it. You'll have to for emissions testing anyways, yes?
no emissions on my car until 2026-27 since its under the exemption for cars under 8 years old in CA but I would like to retain as much factory equipment as possible anyway. is the part in the picture above the suspect part for p0413 code?
and im having the fueling issues at idle and cold start as well as when slowing from driving speed to idle speed (this is when the stall outs occurred)
the AFR is lagging when trying to go from the 12.2 -12.5 range that it uses for acceleration back to 14.7 for idle and sometimes u see it drop to 10-11 AFR and actually stall.
no codes to point toward injectors, misfires etc. I have a permanent p0413 and occasionally I was getting a MAP /IAT implausible signal error and I would always just clean off the sensor and it was fine so my guess was that running rich is starting to foul sensors and cause that rich condition especially with a burble tune where ur forcing rich fuel mixture when letting off throttle coming to a stop anyway.
in case its relevant I run EQT stage 2 e85
