fix your ETM and have the dealer upload the software upgrade. Also, have a dealer run the VIN on their VEN warranty inquiry to see if it is open for any recalls. If it is open for any recalls they would still be under warranty. Better yet, give me you VIN and I'll run it for you. All I need is the last 6 digits of your vin and a way to contact you.

Tough decision. Volvos are nice cars but are plagued with problems especially the S80. If you really like the car I would suggest keeping it. BUT make sure you establish a slush fund for repairs. They are costly and can drive a common man MAD. If you want to keep that car see if the dealer will cough up some of the profit that they made on the sale and apply it to the repair costs. Just a thought.

Go ahead and get it fixed. You will be better off taking it to a Volvo dealer. I just had the same problem with my 1999 S70. It cost me $750. After it is repaired decide if you still like the car. If not sell it. You bought a used car with a used throttle body that had 60,000 mile on it. After $700 you now have a brand new throttle body that should last another 60,000 miles. You still paid much less than a new S80.

Keep the car and fix the problem. It would have happened anyway. You bought a used car...obviously it's going to have a few problems here and there. Take it to a reputable dealer...the independents don't know or most don't have the computer system and knowledge to diagnose or fix this car electronically. The whole car is run by computer. Have the dealer upgrade your software too while you're there. Finally, I don't think you're going to find anything better at the price you paid, except for those boring Japanese Ricers that everyone and their grandmother has. By the way, make sure that your timing belt has been changed. This is very important, especially on a car approaching 70K Miles.

OK, from someone who is NOT a Volvo tech ... Consumer Reports says to avoid the S80s especially the '99. The S80s are seductive automobiles, and a "bargain" on the used car market (or maybe not, when you add in the hassles and the cost of keeping them running). They are pretty scary electronically. This is not something that's limited to Volvo, the BMW 745i is pretty scary electronically, too.

If you can rid yourself of it without taking a large financial hit, that's what I'd suggest.

If I were in the market for a used luxury car, I'd probably limit my search to Lexus and Infiniti. (Not any of the Eurocars, and especially not Jaguar!)

-Punxsutawney Phil

Don't waste your time and money by taking THAT car to any independant as they simply can't fix it. If it is your ETM, only a dealer can DL the needed SW in the new one as it won't run otherwise. ETMs and MAF meters are common S80 ailments and if it's the ETM, it'll have fault code(s) for "internal failure" and no cleaning will ever cure the problem.
The '99 S80s are very problematic and with higher mileage as yours, unfortunately it will drain your wallet often. All leased cars are poorly maintained by their original owners (like NO maintenance) so the cars overall longevity is questionable.
If you can get rid of it, I would and ASAP. Get a newer, non-leased S80 instead ('01 on up).