22.4 AFR @ Idle
#1
22.4 AFR @ Idle
I recently got my TSE turbo kit (EFR 6258) running (MS3 Basic from TSE). After starting and revving it for ~30 seconds, it settles into a low (500 RPM) idle and the AFR (Innovate MTX-L) gauge reads 22.4. I have taken it out for a few drives and under load the AFR reads expected numbers (14.7 at cruise, 13s up slight grades, 8-10 at WOT).
Has anyone else experienced this with this gauge? By the way, it ran for 1 year NA with this gauge and it always behaved (14.7 at idle). I'm thinking the gauge is shot. I did try installing a new O2 sensor with no effect.
Thanks!
Has anyone else experienced this with this gauge? By the way, it ran for 1 year NA with this gauge and it always behaved (14.7 at idle). I'm thinking the gauge is shot. I did try installing a new O2 sensor with no effect.
Thanks!
#4
@18psi: I thought I had an intake leak that I took care of. I will look again.
@pdexta: I have little experience tuning the MS3 (I guess it shows!) but I never said "it's not getting enough fuel at idle". My thought is the gauge is acting up, although I am concerned it could be too lean, since the gauge is telling me so. Per your advice, I'll take a look at the fuel map.
Thanks!
@pdexta: I have little experience tuning the MS3 (I guess it shows!) but I never said "it's not getting enough fuel at idle". My thought is the gauge is acting up, although I am concerned it could be too lean, since the gauge is telling me so. Per your advice, I'll take a look at the fuel map.
Thanks!
#5
Cpt. Slow
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I believe 18psi is referring to an exhaust leak. Typically there's an exhaust leak by the wideband it'll show at idle but read ok elsewhere. Sounds like your sensor is working, and your car wouldn't run above ~16 afr, definitely not 22.4. So it's pulling in air from somewhere.