took the LT1 for a test run to get more data. One thing that seemed strange was the barometer reading. Shouldn't that not change or not change very much? It changed 8 times during a 15 minute run. From like 97.4 KPA to 73.8 to 86. Each time it changes it will stay there for a minute or more. Using datamaster.

 

barometer is updated at key on before the engine starts or at WOT. COuld be that the MAP has a bad ground or the WOT baro update is being fooled by a bad TPS sensor indicating 100% throttle at part throttle.

 

its happening around when the tps sensor is at 90-100%. So, it makes sense that it could be one of those two. I didn't know it updated it at full throttle.