Cold fast idle adjustment

[Wobblywoo]

Hi all

Could anyone tell me which way I should turn the screw on top of the waxstat plunger to reduce cold idle speed. That would be looking directly down on the screw. I'm assuming I have to loosen the nut around the shaft and then it's an Allen key to adjust?

Also, when hot, is it normal for the car to rev at about 1200 when stopping at a junction for example and then settle down say 2-3 seconds later?

Cheers

 

[will930]

Yeah thats normal its the anti shall system holding revs high! I spent money thinking it was a problem!

 

[martinb]

Non of mine have ever done that will?

 

[Eliot]

Also, when hot, is it normal for the car to rev at about 1200 when stopping at a junction for example and then settle down say 2-3 seconds later?

Cheers

mine did it when it was cold, once warmed it settled straight away at at about 750rpm

 

[r-reg-sr]

yeh trouble'ing that cold start 1200 rpm has consequences

 

[will930]

Well its done it on mine since engine change and through a head swap and a full inlet side rebuild! Ed at fusion helped with that! And described it as excitable! Lol

 

[pollyp]

rip out that waxstat plunger mechanism, tis next to useless at this age.
check me guide
http://www.micra.org.uk/threads/43069-How-to-configure-the-IAV-amp-idle-speed-with-Nissan-Datascan

clean up ur IAV and then adjust ur idle screw.
the ecu should open the IAV up and keep idle revs up round 1300rpm when coolant sensor reads cold, then once warmed it should fully close the IAV and the idle screw should be adjusted so the idle drops to 750rpm

 

[frank]

rip out that waxstat plunger mechanism, tis next to useless at this age.

then do a throttlebody coolant heated bypass (Y) cold air intake ftw

 

[pollyp]

then do a throttlebody coolant heated bypass (Y) cold air intake ftw

oh yess(Y)

 

[will930]

I only have the fpr and servo vac lines west are welded up!

 

[will930]

And the vypass