1979 Volvo 262 Bertone
Problem:  Overdrive
When the transmission was replaced, the overdrive would not function properly
Solution:
The overdrive unit was seperated from the transmission, cleaned and reassembled.  The process involved ordering the gaskets from the Volvo dealer, taking all the O Rings to a hydraulic company to be matched and careful reassembly.  When installed, the overdrive unit would engage and disengage.  This problem was attributed to the transmission oil being low.  Also the wiring was carefully inspected for wear.  When completed, the Bertone went down the road!

1989 Volvo 240 Sedan
Problem:  Car Would Run Fine Then Act Like It Was Out Of Fuel
Solution:
The owner of the car had changed both fuel pumps, the distributor, main ecu, air mass meter and the fuel filter.  The owner never bothered to check the igniter located behind the battery on the firewall.  Immediate replacement and the automobile is down the road.

1986 Volvo 740 Turbo
Problem:  Intermittent Starting
Solution:
A common problem in the 740/760 series automobiles is the hall effect sensor located inside the distributor.  Once replaced, the car had no more problems.  Down the road, haven't seen it again.