The engine started to rev to 2000 r.P.M. When cold. When warming it decreases to 800 - 900 r.P.M. This has been the normal idle r.P.M. It had searched for an r.P.M. From 2000 down to 500 r.P.M. When cold. I had the engine injectors and intake cleaned (the 3 step process). There is still a small amount of searching (cold 2100- 1800 warm 900- 800.