G'day, Late last year I bought an RA65 (22R engine, EFI) and It had been sitting in my driveway for a while because it didn't come with a battery (was intended as a project car, had it brought home on a trailer). Long story short, recently got a new battery but while the car is running, the engine shudders and shakes like crazy. If I give it anything more than ~2000 revs, when I let off the accelerator it'll shudder to a stall. I've noticed that there are 2 vacuum tubes that appear to have been cut, and I can't find where they were meant to be previously, and my Haynes book doesn't mention too much about the EFI model. Basically my question is: Would those 'cut' vacuum tubes be the cause of the shuddering and stalling? Or would it be related to something else in the engine? I know a bit of mechanics, but I thought I'd get some advice before I start tinkering too much trying to fix it. I haven't serviced it yet (new spark plugs, leads etc), but I'm not sure if it'll fix the problem completely. I guess Ill do a service of the engine, and see how that goes. A long shot I know; but would anyone have a diagram or anything similar of where the hoses are all meant to go? Cheers, Phill.