Tuning '94 chev Suburban Big Block

[dave w]

Dave:

Thanks again for the assistance. Don't understand the statement "It's a good plan to use closed loop data". Please expand on the statement please. Thanks.

Closed loop is when the computer takes full control of both fuel and spark based on the information from the sensors (Knock, TPS, O2, MAP, RPM, & CTS). Tune using only the data that was recorded when the computer was in closed loop.

dave w