RFA9000
Full member
hi can anyone help, on first start up when cold the engine will rev up to 2500 rpm ive had the throtle set and had all the sensors checked all is ok the only thing that stops this from happining is to disconect the induction pipe between turbo and manifold and then it starts up and revs normal about 1500 has any one come across this befor any idears would help many thanks