Okay, I am fixing to dig deep into the archives to see what I can find, but I thought I would go ahead and post in case someone has a suggestion about what might be causing my problems.

I was blessed when my father decided to give me for Christmas his 1991 Volvo 240. It has 135K original miles and is incredibly clean... but it has been sitting up for the past three years. He has a mechanic on his payroll, and he had the mechanic service it before delivering it to me (I live a couple of hours away from him). He drained the gas tank and filled it with new gas, serviced the transmission, changed the distributor cap, installed new plugs and plug wires, and changed the timing belt. He drove it up on New Year's Day and had no problems. The next day, my problems began.

The car began acting incredibly sluggish, as if it weren't getting fuel. Eventually, it would die, and I would have to pull over to the side of the road. After a brief period (five minutes or less), I could crank it and drive a few miles or so before it would happen again. The only time I have ever had this happen in the past, it was caused by a fuel filter. I changed the fuel filter that afternoon. The problem was improved... but not solved.

I have checked the OBD, and I get the codes that tell me that it is a fuel injector problem, that the car is compensating for rich/lean mixture, and that the car is compensating for extremely rich/lean mixture.

I have put a fuel system cleaner in with each tank of gas, and I notice it does better immediately after I do so, but it has no permanent effect.

The car does well for short distances... I work less than ten minutes from home, and I have no problems to and from work. I have been scared to drive it much further than that because I don't want to deal with the problems.

Any suggestions?