Did you change both O2 sensors for VOLVO ones?
Also are your spark plugs VOLVO ones?
Although these things sound maybe rediculous to you after owning my own
`98 V40 T4 they must have everything VOLVO to perform without a hitch, they are very fussy engines.
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Mercedes C320CDI Sport Estate 3 litre V6 7 Gear Auto
Remap 290bhp 628Nm torque @ 1600revs 45.1mpg
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