Yer well I was wondering if I had a leak with the plenum (blanking plugs, throttle housing, stepper motor wasnt shut fully, where I had mounted niges pwm pipe outlet etc) so put another plenum on and still got the same problem. I can find any air leaks anywhere incl rocker cover pipes, changed valley gasket, rocker cover gasket, I've blocked off the brake servo pipe incase that was leaking and it's still wanting to idle around 1000rpm