BE advised, that particular thread you linked to was for a first gen car. Although it may, I haven't read where it worked unanimously for our 2nd gen cars.

 

^ like they said the cleaning procedure is on page one post 1. the rest of the 34 pages are full of people that had high idle after cleaning and had to perform the quick 2 min relearn procedure (which for many can be very tedious due to strict timing needed in the process due to which many had to do the process dozens of times) but some like me didnt have to do the relearn procedure at all...

Refer to THIS post for relearn procedure as i know this works for sure on the 2nd Gen Gs might be the same as older Gs but not sure as havent read through its procedure. With all thsi said do at your won risk given how many have had issues with the relearn procedure but if you time it right you should be able to get it just fine within few tries IF you need to do it in the first place that is

 

Thank you OP!

I thought i'd share my positive results in cleaning my throttle body.

Previous to doing the cleaning I had a notorious issue with my idle fluctuating, stuttering and even unable to start warm unless given some gas.

I performed the cleaning without having to perform an ecu reset. I followed the following steps.

1) Disconnected negative terminal
2) Began throttle body cleaning twenty minutes later without disconnecting the TB harness.

During the cleaning I wasn't shy in moving the butterfly valve to ensure a thorough cleaning.
3) Replaced the TB gasket with a new one
4) Tightened all TB bolts following the tightening order
5) Reconnected everything
6) Followed the following instructions found in another thread

1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON and wait at least 2 seconds.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF and wait at least 10 seconds.

wait 10 more sec

Operation Procedure:

6.Leave ACC pedal as is
7.Turn IGN switch on 3-4 sec
8.Turn IGN switch off at least 10 sec

7) Started the car, let it warm up, the rpm's dropped within acceptable range, opted not to continue with the rest of the procedure (idle relearn).

Here are my before and after videos, you can see the huge difference.

Before cleaning

After cleaning

 

Private vids.

 

Fixed

 

I just stumbled upon a TSB for our cars on the Infinitihelp.com website that has me wondering if there is a another possible reason some people have trouble with the relearn procedures, while others don't. The bulletin I'm referring to is ITB11-060 " INTAKE AIR VOLUME LEARN WILL NOT COMPLETE" , which applies to all models 2007-2012. Apparently, there is a situation which sometimes occurs where the 'learn' procedure will not complete, EVEN WITH THE CONSULT COMPUTER!! To me, this sounds like it may be what many have described where they can't get the learn procedures to "stick", no mater what they try. It could well be a good many of them just don't get the pedal method down quite right, but this ITB seems to acknowledge that there is a condition where the ECU will not retain a learn procedure even when using the factory diag computer!!.

In the text of the ITB, they mention unplugging the MAF while runnning to provoke a fault code, and only then after sucessfully faulting the system, procede with clearing the code, retrying the procedure, and sucessfully completing it. There is no explanation in the ITB as to what is going on, but maybe there is something that happens in some of the ECU's out there that requires a particular sequence of events before certain relearns can "stick"; like some bit has to be set first or something.

It may not be relevant, but I thought it was interesting enough. Maybe if anyone who is having trouble, and is sure they've done the procedure correctly, comes across this post, they can try doing the steps in the ITB and seeing if it enables the learn procedure to stick. It would be great if we could, once and for all, put the mystery to rest about why some have troubles while others don't.

 

Hey guys,

I cleaned my TB's yesterday as I have read through some threads without disconnecting any harnesses or the battery terminals. Today while driving to work the Service Engine Soon light came on, I have yet to go by the local auto shop to see if it is throwing out any codes. I did move the TB Plates a little bit to clean around them, I have 98K on my 08 Sedan and I don't think I've ever had them cleaned they were a total mess went through about 2 rags that were black as oil!

The idle seems to be perfectly normal as it was prior to cleaning them and I haven't had any issues with a high idle either. Can anyone think of what it could be? Not sure what do because the car seems to drive like new without any issues.

 

^^ Just get the code read, then report it here. Troubleshooting without the code is just guessing.


(especially since you report it's running fine otherwise)

 

My '08 that I bought new just hit 78k so I decided to change the plugs and clean the throttle bodies.....everything went smooth. Although the car wasn't really running poorly, maybe idle a bit less solid....the TB plates were definitely dirty so I felt good doing it. Car fired right up, idled great. I did not have to do the relearn. No check eng light.

But I am wondering about the changing the PCV valve since its relatively cheap and I figured nows a good time considering mileage and the fact the TBs just got cleaned.

My question is does anyone have a recommendation on brand if it matters? My local oreillys can get 3 different brands: Microguard, Import Direct, or Beck Arnley. They're all priced within a few bucks of each other.

Thx

 

Vqsmile you have saved my sanity! I have been stalking this forum for months every time I have an issue with my 03 - 35. I have successfully performed many of the fixes thanks to everyone's generous sharing of knowledge and experience. So it only seems right that I now share my experience, maybe I can help someone else for a change. I, like many others, started having idle issues after cleaning the throttle body. I performed the relearn 50 or more times but it wouldn't stick. If I turned off the engine for more than 2 seconds, the idle would go right back to 900-1000. I tried disconnecting the TB harness, negative battery cable, leaving it disconnected overnight and cleaning the MAF. I was prepared to buy a new TB when I found Vqsmiles post about ITB11-060. The ITB applies to 2007-2012 but I figured it was worth a try on my 03. So here's what I did with the engine warmed up, lights, A/C, etc off:
Accelerator Pedal Release Position Learning
Throttle Valve Closed Position Learning
Idle Air Volume Learning (Throttle Position Learning)
I let the idle get down to a stable 650 which took 30 - 45 seconds
Unplugged the MAF sensor, the engine died within 5 seconds.
Reconnected the MAF sensor.
My OBD-II indicated a PO113 - Intake Air Temp, high voltage signal. After erasing the trouble code I performed the 3 learning procedures in the same order again and SUCCESS!!

 

^^ That's awesome OldMan, I am glad it helped you out. Hopefully somebody with a later model year can eventually confirm whether it works for them as well. As I said, it will be great if we can finally put this seemingly inexplicable issue to rest.

BTW, Welcome to G35Driver.

 

I think the factory part is only about 15 bucks online, but if I had to choose one from your list, the Beck Arnley name is one I'd go with. Their parts quality is usually above average. Don't forget to repace the grommet too (less than a couple bucks). They tend to get hard and brittle and can eventually break apart and fall into the valvetrain.

 

Stop being so disrespectful to seniors.

j/k!

 

^^ Haha, did I offend you Mike?

 

Absolutely not.

Young whippersnappers.