2000 S70 GLT SE

I am experiencing intermittent surging at full throttle. It even seems the car has more power at 3/4 throttle. The car seems to have just "naturally aspirated" or very low boost sometimes. Also, when I do have boost it will come in all of a sudden at 4k or 5k rpm. Lastly, it seems that before the car reaches full operating temp. it will not do this. The dealer has taken care/replaced/reprogrammed the ETM under warranty. I have also replaced the ABS/TRAC module myself. Anything else I'm missing here???

Thanks in advance for the advice,

Drew

 

I would see if there are any codes logged in the system. Then go from there.

Also it could be another bad ETM. Could be another bad ETM software update.