hi there this is my first time on here and i could do with some help please got a 1995 small turbo escort cossie running stage 1 about 300bhp car runs sweet as a nut but when the engine is hot and you rev it up abit when the revs lower it stops at around 1000rpm then suddenly drops to the stage that some times it stalls then the revs pick back up and idels fine soon as you rev it same again revs drop ????