So I was driving my 94 s4 home today and it sounded like it knocked. A little background it sputter under half throttle then picks up and goes a few seconds later. The car is chipped. So Ihome went to start it and everything was normal I was a little low on gas but not severely and it randomly just died in My driveway. I figured it was gas do I put a gallon of 91 in and cranked it a bunch of times and it still wont start. It acted like it wanted too once but there on out just cranked with no fire up what so ever. It's been getting bad gas milage. And failed emissions being too rich a couple weeks ago.