I have a 1993 Volvo 940 GL Regina engine. The car was working fine, but it had the check engine light on. I took the car to the dealership and they said the car was fine and that the computer flashed the code 1-1-1 which means that the car is operating fine. The mechanic at the shop decided to do some cleaning of parts under the hood and I saw him use DW-40. The next day the car's RPMs were too high. I believe that by mistake something was broken or damaged while at the shop. I took the car back to the dealership and as the day went by and they worked with the car the problem got worse. I have been waiting for 3 months and finally they say that the problem with the car is the computer. They say that the problem is in the microship that controls the RPMs. They mentioned something about electrical currents. I would like to know if this sounds right or if they are playing with me? They have lied to me in the past and I don't believe them anymore. All I want is my car fixed and in good working conditions. The same way it was before I took it there. Any ideas?