I still have that hesitation. I checked the engine codes and got:
553 - Air management 2 circuit failure (AM1/TAD) 565 - Canister purge circuit failure
Apparently these are emissions related and will not affect the running of the engine, though I still plan to address them eventually.
Running out of leads I decided to replace some suspect vacuum hoses. They are certainly worn but looked mostly okay.
Anyways the is a tiny amount of flexible hose that joins the MAP to a hard air line. I replaced it. I am hoping this takes care of the hesitation but I am not holding my breath.
I also found some other cracked lines relating to the fuel vent lins. They are related to the canister purge solenoid. Again, not needed for regular operationg but replacing the lines may help clear those codes.
Only time will tell if this fixes the hesitation. Pictures
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| MAP, small flexible hose looks worn | | | hose is pretty bad on close inspection, will be replaced | | | I think this hose allows gas fumes to vent into intake, or something, regardless it will be replaced | | | darn, broke off this line will checking its integrity, shown is the top of the ACV | | | entire intake removed, makes it MUCH easier to get at all the hoses | | | gotta love Ford, they put the vacuum diagram right on the fender | | | just some pictures to capture what is behind the intake | | | front side of the various solenoids, normally I only see these from inside the cab | | | bad elbow vacuum connection. goes to canister purge solenoid | | | line on lower side of photo is well worn, will be replaced | | | small hose section removed, will be replaced | | | other lines on the canister purge solenoid also well worn, will all be replaced | | | | canister purge solenoid, got some codes from the ECU regarding this one | | | fished out the broken part of the line from the boot, I can reuse | | | the broken line had a bulge near the end thankfully so I was able to reuse the line | | | | center of frame you can see an entire new section of hose | | | | | |