Mercer,
Do a search on the MAF and the ERG valve/tube. Other cause could be fuel filter.
My dealer service dept. (a good one) has been tracking for a while now some problems with the ERG valve going bad on VX's. Fluctuating RPM's, stalling, etc. They even mentioned more serious problems related somehow to engine running hotter --> piston failure.
I am taking my VX in for its 60K ;eekr; check-up tomorrow. I have some rare occurances of fluctuating RPMs and one stall about a week ago when the engine was cold. They are gonna look into it. I'll have more information tommorw as to what they find.
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