Volvo Repair: Volvo -- stalling, spark plug wires, noticable difference

Question
The car is a '92  940 with a red block engine (B230F) and 175K on the clock.  Lately, on cold starts it occasionally stumbles and stalls. Has to be restarted.  Getting a little worse, and occasionally seeing this when it's warmed up, but not as much. Otherwise, driveability is fine, and mileage is good.  Is it time to clean the injectors?

Answer
Yes, I would recommend that. Check around for a shop that has a "motorvac carbon blaster". This is the only thing that cleans them well, and show a noticable difference. also recomend new spark plug wires if they're old...this can cause similar problem.