RE: My jato 3.3 model 5509
Sounds like it isn't getting enough fuel now. Try opening up the hsn 1/8 turn counter clockwise until it gets a bit more. Maybe open up the idle just a bit more and the do the pinch test on the line. If the car takes more than 3 seconds full to stop turn the lsn leaner(clockwise) just a smidge and try again. Do that until your getting 3 second pinch. You may have to adjust the idle as you adjust the lsn.