Okay, that make sense. By any chance, do you have a receipt that may list the engine size and trouble codes that are found? Without that info, I'm really at a loss. The trouble code, which will be a letter P followed by four numbers (ie. P0420) will let me know what components are affected. With that and the engine size, I can determine what should be checked or if there is a common problem that I know of from experience.
If the vehicle is running good, chances are the code is going to be related to an emissions component. That could be a multitude of things. However, often times with these vehicles, the problems are related to either a poor ground, a broken wire, poor connection, and many times I have seen the wiring harnesses wear through causing a short. The truth of the matter is that the PCM is usually the last thing that is the actual problem. Could it be? Yes, but before I jump to that conclusion, I want to make sure all avenues are checked and reviewed.
As far as the starting below a 1/4 tank of fuel, that isn't too uncommon. The fuel pump location is basically centered in the tank. If you are on a steep enough incline, the pump can't reach enough of the fuel to provide the start-up pressure needed. My guess is when the vehicle was on a more level surface, the problem went away.
Check your invoice and let me know if anything it there. If you don't have one, see if the dealer you went to will provide that information to you.
I look forward to hearing from you.
Wednesday, March 4th, 2015 AT 5:17 AM