IACV test/diagnostic?

[bobbo]

Any one having high idle issues may want to have a look at this....

http://www.twinturbo.net/nissan/300zx/forums/technical/view/920448/Idle-valve-IAA-and-air-regulator-how-to-part-2.html

[bakerman1978]

thanks bobbo this is very helpful did you squeeze the hose and if so is that's what was wrong with yours

[bobbo]

There's more to it then just squeezing the hose. There are other places it can draw air from. I just ordered a new IACV this afternoon. Nissan had one in Vancouver so it'll be the end of next week/early the following week before it gets here.
I'm still not sure if this is causing my high idle but I've exhausted virtually everything else.

[bakerman1978]

There's more to it then just squeezing the hose. There are other places it can draw air from. I just ordered a new IACV this afternoon. Nissan had one in Vancouver so it'll be the end of next week/early the following week before it gets here.
I'm still not sure if this is causing my high idle but I've exhausted virtually everything else.

i was at my mechanics house and the car was idleing at 2000 rpm i had yo go so he just inpluged the iacv valve and it dropped it to 1300 rpm so now I'm wondering i fit could be the tps or air regulator or vacum leak or coolant temp sensor or mafs ...... lol to many things can cause high idle by the way can i aski what your paying for your iacv

[bobbo]

I don't mind at all! It was $156 taxes in. I would HIGLY suggest taking the car to Nissan and plugging in their Consult. It MAY answer all or some of your questions.
I have twice and both times eliminated a number of possibilities. They charged me $100 each time but I feel it was good value.

[bakerman1978]

I don't mind at all! It was $156 taxes in. I would HIGLY suggest taking the car to Nissan and plugging in their Consult. It MAY answer all or some of your questions.
I have twice and both times eliminated a number of possibilities. They charged me $100 each time but I feel it was good value.

my mechanic works for nissan and he had the consult at home and everything checked out except the level was at %2 instead of %15, that's agood price for the iacv is that brand new ?

[bobbo]

Brand new from the parts counter at my friendly local Nissan Dealer!
My AAC valve was closed to 2% aswell. The computer is comanding an idle of 950 RPM and not getting it so it's making every effort to cut the RPM down. The only real option it has is to shut the AAC valve. You probably find your car is running/idling quite rich?

[bakerman1978]

Brand new from the parts counter at my friendly local Nissan Dealer!
My AAC valve was closed to 2% aswell. The computer is comanding an idle of 950 RPM and not getting it so it's making every effort to cut the RPM down. The only real option it has is to shut the AAC valve. You probably find your car is running/idling quite rich?

yeah i guess it's running rich it is really hard on gas and a little sluggish on take off i left a reply on the gtrpwr site about every thing i have up to date on it more or less i think and airleak may be present as well but i am curious were you making that kind of 0-60 time with your high idle problem thanks

[bobbo]

i am curious were you making that kind of 0-60 time with your high idle problem thanks

Yes I did!

[bakerman1978]

Yes I did!

cool so i guess that helped you narrow it down to your iacv

[R33rr]

There's more to it then just squeezing the hose. There are other places it can draw air from. I just ordered a new IACV this afternoon. Nissan had one in Vancouver so it'll be the end of next week/early the following week before it gets here.
I'm still not sure if this is causing my high idle but I've exhausted virtually everything else.

do you have the part number for IACV valve. can you pm please .

[bobbo]

Sure!

[amnash]

good read. i should have done that when i did my aicv valve(or what ever its called) i was lazy and just wanted to get the intake plenium back on lol hopefully shes all good