<prompt> Human: So on Wednesday, I had AAA tow my car to their auto car place instead of the Nissan dealership which was my first mistake. And when they diagnosed the issues, the said two of the engine codes were transmission, and one was for the spark plug coils. So then they did 700 worth of work to it, and now my car doesnt start. They did do work to it, but now its in worse shape then it was before I had it towed there. So I dont know any logical reason for me to have to pay for that. And now they are saying that they think its the timing chain. So to me it seems like theyre just getting paid to pull parts out of a hat and hope that one works. Should I threaten them with the Better business Bureau? Should I even bother arguing? Any help would be awesome.  <response>: Im in the automotive industry. They cant get away with this, you pay a diagnostic fee to diagnose the problem you are having. Since it was an engine diagnostic you paid a flat rate for them to tell you what was wrong with your car. Your car still doesnt work so they obviously did not diagnose your car properly which is not your fault. That 700 you paid for repairs MIGHT not have even been needed. Tell them that you paid to have your diagnosed and they did it wrong. You want your money back for the LABOR on the parts they already installed and they need to diagnose what is actually wrong with you vehicle. They should also throw in a loaner car. These requests are not unreasonable and they should comply.This is getting me heated thinking about it. They sound like backyard mechanics who need to keep replacing parts until something works. What the hell do they mean that they think its a timing chain problem, it either is or it isnt. We have very expensive equipment to figure this kind of thing out. 