Hi I have a 16v 1989 740 wagon. It sat for 3 months with 1/2 tank of fuel. I came home drove it about 180 miles and noted it just turned 240,000 miles and was running great. It died 2 minutes later. It was down to empty and I think it has water in the fuel. I was towed home but got it running on wd40 up the air intake pipe. I split the fuel line and pumped a quart of fuel into a bottle and it looked ok. Drove to the gas station and put in 2 dry gas and filled it up. Check engine light is on. I have lost my faith in it. What should I do to ensure it will keep on running and how do I reset light or is it telling me there is another problem. Want to believe!