Turn the key engine revs to 3000 plus revs without touching the pedal. Then drops .going down the road car runs on its own foot off the pedal seems to speed up break to stop to slow car engine revs drop when stopped it is an automatic so it a bit of a problem
Have changed tps and idle valve but no difference.
Any help please most welcome
Thank you .
Check the PCV valve and hose , If faulty / leaking it gives an air leak which increases engine revs . On some it can mean removing inlet manifold to replace .
Just added to AutoInsider... vehicle recovery and transportation services nationwide and 24/7
A user posted this problem and got the solution, no more cold behinds on early morning starts!