Hi, The previous owner of my car installed a brand new Volvo engine a couple of years ago, I think it is from a 760 - it looks identical to a DeLorean engine. There is a couple of things done that I find a bit strange: -The vacuum line between the charcoal canister and the throttle edge tapping is missing. -There is a vacuum line going straight from the throttle edge tapping to the spark advance on the distrubitor - the solenoid valve is bypassed. -The control pressure regulator seems to be a "760 type" - no vacuum conections. -The thermal control valve is not used. What is this? should I buy a new CPR and the other stuff that is missing, and make the vacuum system "original" again - or should I leave it as it is. Does not the vacuum line between the charcoal canister and the throttle edge tapping serve a purpose? Thanks, Wilhelm Starberg #10816