Originally I posted this in Historic, but I got an update from my roommate. I had the wrong model year. The post belongs here instead.
My roommate owns a 1983 Subaru Brat. It has this problem in which it goes up a grade, it'll surge and stop, surge and stop, until the motor dies. My roommate has replaced the oxygen sensor, something that starts with an E, the fuel pump, the gas tubes, the vacuum something, and some other stuff but the problem is still occuring. What can anybody do? If you need more details, let me know.
I just spoke with him. He has done the following: All vacuum lines checked, replaced vacuum sensor, the EGR valve, and the fuel sensor, no problem with piston or rings, he had it tuned up a month ago, and he has already replaced the fuel filter. What else is there to check?