hello to all (volvo gurus) ..my 98 v70r has been acting up at a stop with the brakes aplied (at least that where i notice it most) every once in a while it feels like it bogs (like the abs kicks on or ac clutch kicks on or misfire ???) ..I notice the rpms drop a couple of hunded like from 1000 (which is close to normal idile) to 800 rpm then it picks right back up (and i checked for intake leaks already replacings some clamps here and there)...the car drives fine power is good so I was thinking it might be the abs coming on for a second or the ac cluch was coming on for a second ??? any ideas how to diagnose the problem ???how can i know if its the abs or ac or neither .... I called the service folks at volvo and they told me they would have to drive it for a while with some scanner hooked up to the obd2 giving them live read outs anyone know where i can rent one of these things cause i'm sure there expensive any info would be lovely thanks for reading