Quote:
Originally Posted by pmckechnie
Are there any other codes. If the only code is p0171 than look for a vacuum leak on the left side of the engine. If the truck is running OK, drive it for a few days and see if it gets any other codes. The P017X codes are some of the hardest to diagnose. Hopefully you will get another code that can help diagnose the problem. Just running out of fuel should not cause a problem like this.
Let us know if you have any more clues.
Paul
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P0171 Lean codes can be somewhat difficult to solve and just changing suspected parts without really doing a proper diag will cost more money and waste time. If you want to start looking for a vacuum leak, get a scanner where you can view your fuel trims, then spray carb cleaner around the suspected areas of a vacuum leak and see if the fuel trims change and note how the engine runs when you spray around suspected areas. If you have exhausted all means of diag yourself, reset the code and try resetting the computer by means of a factory scanner or something similar. Just simply disconnecting the battery wont clear the computers "Keep Alive Memory"
Also, use the scanner to check your O2 readings and check for any other readings that may be out of parameter