etlsport,

Thanks for the possible culprit suggestion.

I wonder if that is connected to another minor problem that shows up about once a month. When I start the engine it idles so low that the engine will not keep running. A second start with more pressure on the gas pedal to keep the idle higher for a minute, then everything is OK. This seems to only happen when the engine is warm, not hot or cold. For example, the last time it occurred - after setting for an hour after a 30 minute drive from work to my daughter's softball game.

So where is the fuel pressure regulator?

BTW, I did a 500+ mile business trip today in the VX with no problems of any kind, except the amount of gas consumed

Henry