Air/fuel meter running lean after warm up

[Alen Dean]

Power commander Autotune ecu

 

[hlmrx1]

My AFR gauge is an old school light meter (2005). It reads rich at 5 o-clock, stoich. at 12 and lean at 7 o-clock . I do not have another gauge. I did notice that the wires are connected with crimps which are not a good connection. Perhaps an updated gauge is needed. Any suggestions on what the most accurate brand is? I put about 80 miles on it yesterday and today and still the same. Once warmed up the gauge leans out right off the scale on the gauge. No lights or meter readings with any throttle position and at an idle. Shut it down, let it cool off for 30 mins and when started up again it shows normal readings. @hlmrx1 the engine is not stock - low compression pistons and rods.

Yep I realized that, what I meant by that is that when I'm cruising on the trail at low speeds, it's not making any boost, therefore basically running stock and AFR's are at 13/14 especially once it's at operating temperature. Not sure id others experience the same thing, but mine seems to. When boost comes on, the auxiliary injectors start to spray and the AFR's come down to 11's. Someone mentioned to me that a stock Apex will run lean like that also although I've never run one with an AFR gauge.

 

[Alen Dean]

Alen,
What you have in your picture is a MAP sensor (Manifold Absolute Pressure) reading boost pressure in the intake plenum. Or the BARO sensor that the Apex uses that they mounted in the intake. Apex uses one of each.
Do you know what type of fuel controller you have for the SC kit? That Bosch sensor looks to be a 3 Bar MAP sensor likely used by whatever fuel controller they have for the SC...

Power commander V ----?