Idle speed

Right feel like am really getting somewhere with my car now boost leak sorted and det sensor changed.

Next job to tackle is the idle speed.

The result I was getting before sensor change( det)

Cold....1500rpm
Slightly warm ....1000rpm
Up to temperature. 1500rpm

And now

1500
1000
1250

I'm not sure if this is normal? I get the feeling the last figure should be under thousand?

I have read the sticky idle speed but it was not very useful because I don't know any of them adjustment are.

So where do i start?

Mine idles just below 1000rpm .....
Start by checking the tps .then base timing ..  there is a how to in the how to section ....

as bob said in a different post .  think it was check the charcoal canister or summit

mine idles at 850 - 1000 rpm

Ias screw as is going to be visible with a top mount? anybody have a diagram

Cheers

It is sometimes hide in a piece of pipe .... diagram in the how to section .... in useful diagrams mate ...

Just reading the sticky on idle speed problems. Kind of makes sense a bit now. It seems like all the components are on the IAA UNIT.

Slightly confused,

IAS VALVE
AAC VALE
FICD
IAR
TPS
Vacuum ports rubber boots where the hell are they?

says that these may cause the problem. How do I check or adjust these things
If they are in the right parameters that they are supposed to be in.

And if I adjust one,will it correct the idle speed and cover up original issue? If That makes sense

By the way I have a top mount which makes it really difficult to see things..

The vacum ports are the ones on the throtle bodies at the bottom of each one.... they are not adjustable iirc ...

I thought the vacuum ports were there to be used to measure vacuum when adjusting the throttle bodies individually via the screws just above the vacuum ports, but you shouldn't touch the screws unless you know what your doing because I have heard they can be a nightmare to set up once you start messing with them so best not to touch those screws!

I had one of the vacuum port plugs blow off once and it made the car idle rough and run super lean.

Anybody know have a picture of these valves? I can adjust them or check them with the meter possibly? What resistance or voltage or i dont know  

Or a picture of the IAA unit

Any help appreciated thanks..
Want to Find the correct issue

 

I don't know if these picture will be any use to you mate but here is a picture of the throttle bodie vacuum ports and the adjustment screws for the throttle bodies.
The screws usually have a rubber cap covering them and the vacuum ports are supposed capped of with rubber bungs, they are not supposed to be open like on the pic

And here's some pics of the rear of the engine if they are of any help to you







I'm not sure exactly what's what back there though

Cheers mate. I think the purple clip is one of the them. I think I can probably my hand round the back to feel the boots.

Yeah that's helped.. Still un sure about the rest lol

Think i found something? It says sr20de models. Would this applie to me

Nissans IAA UNIT   
   

http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0900c152801ce42f#hd1-1-4