thank you Tony for that info, will call KIA dealer again today . To be honest not that impressed with some Kia dealers , first two I called said they would have to call me back with price & availability - but never called back { I don't know why they couldn't look it up while I was on the phone}

The 3rd dealer I called was helpful and did look it up while I was on phone and quoted above price, he also mentioned the swirl flaps in the manifold causing similar problems but these seem to be operating okay when I last looked at car
thanks dave