I have tracked down why my stability trac comes on at, or below 1500rpm. Im also throwing a map sensor code p0556. I have verified that i have a good map sensor and maf. I checked my vacuum and for the heads and cam setup im running resulted in a low 11inches of vacuum. I kind of read that some corvette guy were getting similar issues. From what I can understand the map sensor is issuing a self check type test against so air flow table, when it does this it doesnt match resulting in a p0556. Is their a way to change the table to make the test happen at a higher rpm, or disable it all together?