My '90 8v 740 is still suffering with slight fuel economy issues, rough idling, and lack luster power. I've done a lot of the usual checks per the FAQ and others' kind recommendation, but I'm starting to believe the problem is in regards to one of the sensors (e.g. ECT) or computer related.

My general mechanic is good with fundamental car stuff, but as soon as you get in to computer stuff, then he gets a little lost. My question is whether a Volvo specialist would have diagnostic tools that can actually pin point what the problem is if it is INDEED a sensor/electronic/ECU related problem. Or are they just going to pull error codes like the rest of us and play the guess, replace, and check game?

And is anyone aware of a reputable volvo specialist in San Diego? =D