98 Volvo with D12

[DarrenEW]

(09-21-2020 )Rawze Wrote:  could be anything... including funny tire wear.

Thanks Rawze for your response. It has a brand new set of steering tires and drive tires. Wouldn't it vibrate consistently at 110 kph if it were the tires? Could it be the air compressor that causes this? When I open the hood and compressor starts to work, it seems like it's struggling according to what I hear from the intake. Also, I can hear engine stall down at the exhaust and then poof, seems to take off (that is at idle); I am wondering if the vibration isn't linked to this issue. I am at a loss.