Hi all I am new to this board having just purchased a 2000 V70 XC AWD SE. The car seems to run beautifully at easy to mid throttle and pulls nicely towards full boost but then feels as if I have lifted my foot off the throttle for a split second and will do this repeatedly whilst accelerating and until I let off the throttle. Has anyone else had this problem?

 

I JUST experienced the same damn thing as you described on a 2005 with 105,000 miles. I took it in to the dealer and paid the $120 diagnostics check. They told me I need to have the following replaced: Fuel pressure sensor, Vacuum Pump Switch, and Fuel Pump Electronics Module. They want $1300 for this. I looked online for parts and could only find a fuel pressure sensor. No one has any clue what the vacuum pump switch or the fuel pump electonics module is. I specifically asked the dealer if the fuel pump needs to be replaced and they said no.... only the fuel pump elec module (which appranantly does not exist.) WTF! Anyone have any suggestions?

 

I would ask the dealer for part numbers and prices for the 3 parts, then try
to find them on the web. Replace one at a time, see if it fixes the problem.