Your 97 engine won’t have vvt in the exhaust so the 99 eco will be unhappy about that. You will have to stay with the 99 ecu as it talks to the CDm and other stuff and is VIN matched

1999 was the first year with electronic ETM. You can move the coil on plugs to the older engine and then block off the distributor hole with a cap thatVolvo sells. A tune could remove the VVT function, I don’t know a lot about that. Pcv is different on the older block but that’s some hoses to adapt ...

I know of guys that have used newer engines in older models but not the other way around. They could do this as the block is mostly the same or still has the bolt holes that were used in older engines. The difficulty in moving to a later model is even the dashboard wiring harness is different from a...

I'd first suspect the valve stem seals or the turbo as well. Hard to believe the turbo would be bad with these little miles. My 94 T5 would smoke like hell once the turbo went bad at around 300.000 km. The valve stem seals harden up with time. This is likely after these years. Check for it by lettin...

1999 was the first year with electronic ETM. Keep in mind he has a Euro spec, and they got things a year before we did. Not that it makes a difference in this case. Fef0 , I took my son to Sicily in 2017. We stayed in Aci Trezza. The first 4 of these are getting to Sicily, but the rest are Aci Trez...