Bakster

When I turn on engine I still have 3,5-4 rpm I don;t know why it is

vroooom ptssssh

Auxiliary air valve (idle speed control valve) back of the inlet manifold




"This item is a device to aid the engine when cold by opening a small port to increase the engine's idle speed. The fast idle control is achieved by the port being held open by a bi-metalic strip that when heated by it's own heater element, or via natural heat soak from the engine, the port closes. The voltage supply to the air valve is the same as the feed to the fuel pump and the warm-up-regulator. If it is found that the idle speed will not reduce and that the speed is maintained artificially high when warm, clamp the rubber pipe between the air valve and the inlet manifold. If this action causes the engine rev's to return to normal, the fault is within a sticking auxiliary air valve.
It is worth cleaning the valve, lubricating it and re-test it's operation. The internal heater element can also be checked for continuity using a multimeter. "


probably that, unless you've already eliminated it.
if not, throttle stuck open by something?

Bakster

I have efi I bought new Idle valve.. Look all manifold and pipe...

vroooom ptssssh

I see...well I cant help you then sorry

GuGu

A good technician can solve your problem easily.. I think your idle is high because of wrong setup...