Help with Idle Air Volume Relearn Procedure

T-Rex57

Hello all,

Two weeks ago, I replaced my twin-ram intakes with the stock ones that came with the car (with some Mishimoto pipes). On cold start, the car now idles around 1500rpm instead of 650-ish rpm. It's been creeping up over the last few starts, I first noticed the high idle a few days ago at around 1000 rpm.

Throttle response is also very poor. In light of this and some research, I decided I needed to do the Idle Air Volume relearn 2003-2011 Nissan 350Z - 370Z Idle Air Volume Learning Procedure | Nissanhelp.com

Problem is instructions don't seem to work. For instance, a MIL/CEL light is supposed to blink during the procedure. Mine does not, despite following the instructions to the letter. Does anyone know the proper procedure for a 7AT 370z? Car is tuned with Uprev.

Regards, MK

Trips

See if this could help.

Custom ported and CNC throttle bodies, upper and lower manifolds

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JWillis72

That is the correct instructions, we did it on my car today but make sure you time the steps. I think we messed up the first time by turning the car off after step 9.

T-Rex57

Nice, but I don't have several months salary to blow on such

T-Rex57

Did you pull the battery terminal first before starting? I swear I've timed this at least 20 times and didn't once see the CEL (MIL?) light flash once. I didn't pull the battery terminal though

Trips

Oh I know that, but it also steps you thru the re-learn procedure.

I think thats what you were asking for.

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T-Rex57

Ahh now I gotcha. Thanks mate, I'll take a read.

I've searched for this problem on the forums before posting of course, but as JWillis says, those are the instructions everyone uses. Perhaps having an AU model car is an issue?

SouthArk370Z

IMNSHO, the search function here leaves a lot to be desired. Great site; crappy search.

I've had much better luck using one of the big web search engines - Bing, DuckDuckGo, Google, &c - and adding "site:the370z,com" to my search string.

Eg:
https://duckduckgo.com/?q=Idle+Air+V...%3Athe370z.com

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T-Rex57

Ok, just tried again following instructions in the other thread.

I'm assuming "ON" is on without the engine started. In this state, the battery only reads 12.0V, not 12.9V like it says under "PREPARATION". I'm assuming this is why the procedure doesn't work.

New battery?

JWillis72

On is pushing the button twice without you foot on the breaks, engine doesn't start. 12.9 is when it's running I believe.


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JWillis72

Are you using a stop watch?


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newls196

12.9 has to be with engine off.... if your voltage reads 12.9 while engine is on, then an alt is within someones future

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2012 370z
6MT "Sport Package" Z1 CSC, Z1 Test Pipes, ARK Catback, Injen CAI, SpeedBooster, Custom PCV Canister setup, Z1 dyno tune coming soon

T-Rex57

I am using Stopwatch for all procedures.

Volts are between 13 and 14 when running. 12.0 when engine is off but button set to ON (two pushes)

I've done an ECU reset this morning, short distance drive and everything seems a little better. Could be all mind games though eh?

kittens

I am trying to do the reset but not working. I used the clock on my computer so was sure it was enough seconds. for step 6 (and 7a, b) do I do the 5 pedal stomps while the car is ON or OFF? I couldn't get a blinking CEL but I had a solid one show (but I think it shows anyway if it is ON)

I made sure it was at least x seconds but if it was x+1 would it throw it off? seems hard to get exactly

Sean1125R

I was seriously losing my mind trying to accomplish this. I had my phone out timing it to the exact second for days on end. It never accorded to me to disconnect the battery again when retrying the idle volume reset after changing out the throttle bodies. I figured since I had the battery disconnected during install that should have sufficed. But low and behold that was exactly what was needed. After many days of frustration and about to contact EPS for a possible solution I came across this thread and my problem is solved. I disconnected the battery for 30 seconds and on the third attempt I nailed down the timing and now the Z is all good and idling properly once again.