'01 S80 T6

it sounds like this could be an issue with your Oxygen Sensor. Can you
smell petrol while at a stop light?

 

103,000 miles, engine has developed a "surge" while accelerating. Sometimes
it will go nice and smooth, others it will speed up, die-off, speed up
repeatedly while accelerating. New plugs about 12,000 miles ago, injector
cleaner "Sea Foam" through the fuel tank about 5 fill-ups ago. That seemed
to help a little but it is right back doing the same thing again.

Does this car have a wastegate that needs to be lubed? Any suggestions
will be appreciated, I am not really wanting to go to the dealer having just
plunked down $800 for a timing belt change.

 

My 2000 also had this problem, the dealer put in new software, no charge,
fixed it right up. My car actually stopped running when at idle sometimes
(2x), I told the dealer this, I think it was a safety issue then, and it was
fixed for free.

sc

 

Thanks Scott, I will look into that. I do not see the engine stopping at
idle though. I will call my dealer today (100 miles away in Dallas.)