Question for you again. Do you have a scan tool? I would think if it dose'nt affect driving any, it's probably your gauge. The way it runs is not bothered? Can't off the top of my head think of any possible problem that cause this from your fuelrail tap to the gauge. If you had pump starting to fail or an ostruction in your main line or a problem with injectors-regulator it would affect drivability. Then again maybe not. Jace