Originally Posted by jhowell
Im going to try reinstalling the new tune again on the sd card up date firm ware and install again to see if that takes care of it. I will repost again tomorrow with the out-come. Thanks!
Yeah, the update really should not change anything, unless it is a connection issue somewhere. The firmware is what runs the gauges and all communication. I'll have a look into the Manifold Pressure monitoring to see if we can find a bug tomorrow. I have a Black Maxx in my 6.4 and have only seen the 100psi a few times upon start up. The 100psi value is present when the Black Maxx is getting an empty response back from the PCM for that parameter, so there is likely a communication issue somewhere.