2004 MERCURY MOUNTAINEER 4.6 V8 code p1297 no power

Question

I HAVE A 04 MERCURY MOUNTAINEER ENG V8 IT LOSS ALL ITS POWER IT NOT MISSING ABOUT 10 OR 15MPH IT WILL SHIFT 3 TIME AT 0 TO 10MPH ODB2 P1297 PLS TEL ME

Answer 1

P1297 No change in MAP sensor voltage

This is a code that Mercury does not use, this does not mean its not valid, if you got this code doing a KOER (Key on Engine Running ) test, there are 2 area you need to check, you need to check the MAF airduct for any opens or tears which would take in false air, if that clear check for a plugged exhaust.