Graculus
Well-Known Member
No, just remove the 'Y' piece (lift it up and move to the side to release one of the 'arms' of the Y) then electrically connect it so it doesn't throw a DTC so you can do a manifold vacuum draw test one each side independently to see if there's a difference, but as you mentioned earlier that it cut out whilst driving with the previous owner, then it's probably not a relevant test as it'd still run on the other bank as mentioned earlier.