ive recently done a engine converstion on my mk1 saxo vtr by fitting a mk2 engine but running it of my inlet, loom and ecu start it up and it doesnt idle rite its revs up and down and the idle control valve hose on air box is sucking in air and i got told it is ment to blow, but it i unplug the icv, block the hose and adjust the throttle til it idles it fine 
any help would be most grateful :/
any help would be most grateful :/