Thanks for all replys will look into this, but at the moment am very unwell so car will have to wait plus exaust and manifold are off car at mo so cant do much with it but if i find anything when back together will post
forgot to say have after market pump from merlinsport which has always made buzzing sound from new this is what i can here and which used to stop after a few seconds but now is continous.
thanks again for all you help.
tw4enty