reduced power mode after maf tuning

[opsguy34]

this is a mostly stock 03 silverado 5.3
truck has long tube headers , recently installed bbk 80mm tb .
after trying to tune maf it comes up with reduced power mode .
someone want to check tune for something i may have missed ?
thanks in advance

[planethax]

post a log of it entering REP

[seven ends]

Minor but you might try adjusting the scalar from .0208 to .0198 (78mm to 80mm TB). Would normally need to retune afterward. Also do a compare to your stock file and open the MAF airflow table and look at delta screen. You have suspect areas between 3250 and 3750, 5750, and 7750+ hz. Also wise to run RAF tuning following other changes. Good advice earlier to get a log file to get real help in pinpointing the problem. Cheers.

[blownbluez06]

some things in the tune that can cause REP:

Min/max MAP values in the 106 tables (engine diag)
exceeded calculated airflow tables in the 1514 table (easiest proper way to fix that is to raise it incrementally until it goes away)

External causes are: throttle body issues. Anything physically resisting blade movement, TB unplugged, TAC module defective, TAC module power or ground issues, defective TPS sensor, Defective accelerator pedal assembly.