How to do the reset? By simply starving the car’s ECU of electricity.
How to Zero out Your Volvo’s Computer and Make it Re-Learn your Driving Style
Since all 1990s and 2000s Volvos’ ECU’s have volatile memory and rely on a constant supply of 12 volts DC from the car, disconnecting the battery will do it. Follow the link below for more on this procedure.
“When my MAF sensor went bad, I changed the sensor and the car ran afterwards – but it was reaaaallllyyyy slow until the turbo picked up, and I noticed black smoke out the back. Once I reset the computer, it instantly had its pep back.”
MVS Forums Contributor northernlights:
The 628 was allegedly stock for the 1995 T5-R, 1996 850R and 1997 850R. I have a list of part numbers for the T5-R ECU’s, and one of the 850R ECU’s, all from the EGR delete attachment (which is interesting in itself!)
These are the numbers I have:
9146962, 8601043, 1275388, 8601113
My 628 ECU is not on this list. It is marked P001270xxx, which is most of the actual part number. My original 94 ECU (an 072) is marked P06842210 which is one of the part numbers listed on the EGR paper, so I tend to believe it is accurate.
Anyone have any other part numbers? Like I said, it sure seems stronger than 18 peak hp. And this was before I adjusted the wastegate to 2.4 psi with my patented tool.