When the problem accrued on one occasion, I unplugged the MAF connection to test it and the engine stalled. Don’t forget that the vehicle runs smooth with no issues most of the time. When it starts, I feel it coming, first at a higher rpm, then it starts losing power and I can’t rev it more than 1500rpm. Does not matter what I do it sputters but never shuts off. I eventually get it home or to a safe area and park it for a few hours or overnight and then it drives perfect after. I used to think it only happens when the vehicle is at normal operation temp, I was wrong, It has happened in the morning as well. The biggest problem is, when it’s at the garage and the mechanic looks at it, it never happens. HELP!