I have the exact Volvo you have....has your mechanic ruled out the fuel filter?....the fuel filter is below the driver seat on the undercarriage...some forum members have have just rapped the filter lightly with a hammer (or similar heavy object) to make things right.' If you ever need to replace yo...

I have a 1994 940 nonturbo automatic with 165K miles. Lately at cold startup each morning, the idle shoots way up to 2K rpm on the tach. It takes a few minutes to come down to 1500. After I've driven about 3-4 miles, the idle is about 900rpm at a stoplight. At cold startup in the evening, it revs at...