I'm experiencing hesitation from first gear to second? The car seems to shift fine second but it's kind of hard to go from 1st to 2nd without pressing on the pedal a little bit hard. It sort of hangs in between. Any suggestions?

 

mine has kinda stuttered here too lately. interested to hear.

 

Here are typical issues with the 5.5's
- Potential MAF issue causes fuctuation in idle between 2500-3500
- TSB hesitation. Same as above but, ECU might need a reflash upgrade from dealer

 

Replaced the MAF about a month ago.

What's the ECU reflash? Is that because I got a new MAF or is it a completley different thing?