Engine Mechanical problem
1993 Volvo 940 4 cyl Two Wheel Drive Automatic 125000 miles
I have a 1993 volvo 940 wagon 4 cyl automatic. At times it will not start. Sometimes it will run perfectly but then on the next time out it may not start at all. Twice it has cut off while driving (while coasting at low speed.) The car is sparking properly and I can hear the fuel pump running when the ignition switch is turned on. A code check turned up an idling control sensor. What are the possible problems? Thanks for your help.