Car randomly chokes out at low throttle.

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bg2013

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2013 with 160,000 miles. Car sat for almost a year due to a transmission fluid leak I couldn’t afford to fix. Got the leak fixed at the dealer, their inspection showed no other issues. I drove it home from the dealer and it drove great however, after letting my wife drive it (who must have a much lighter foot than me) I’ve discovered a problem. If you are at low rpm’s and have let off the throttle completely (e.g coasting through a turn) when you start to ease back into the throttle it feels like there is nothing there, rpm’s stay the same if not go down, car doesn’t accelerate. Feels like it’s being choked somewhere. If you push the throttle further it eventually wakes up and takes off. Only happens under that specific scenario of very light throttle after coasting, doesn’t happen every time you’re in that scenario but I’d say probably 5 out of every 10 times it does. I did a little research last night and it pointed me towards some potential culprits so today I removed and cleaned the throttle body, as well as both MAP sensors, then did the idle re-learn procedure. It definitely helped, took it from 5/10 times down to probably 2/10 but it’s still there. It has no codes other than o2 sensors for deleted cats.

Should also mention that it had 1/4 of fuel in it for the whole time it sat (I know terrible idea‍♂️) I added a bottle of Techron fuel system cleaner, topped it off with 93. Changed the oil and a bad coil pack. Not sure if this could be related to the bad gas
 

kryptto

The Best Thing About Cars... ones in my mirror.
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clogged intake and valve mushrooms coked up. walnut blast service is my thought. check the PVC system there is a an oil separator and it can get clogged with oil. there is a port that goes into the valve cover toward the grill it can cause on our older years oil to spit up into the PVC system. very few cars have it replaced with the newer green plastic port. sorry I am rushing to assist, but my best guesses.
 
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