DIY: Clean your throttle bodies
I just took my 2006 Coupe, 6mt to Nissan for an oil change and smog test. They were unable to complete the smog test due to the rpm's not staying within range for reading. Apparently they were jumping every 30 seconds or so. I have 58,200 miles on it, have never cleaned or done anything to it other than oil changes, it's stock, no CAI or exhaust upgrades. I have no CEL but have noticed it feeling a little jumpy sometimes, more so when I let off the gas and "coast". I immediately thought it could be an issue with cleaning the throttle body, I was hoping someone could advise me if this may be the case. I hate to spend hundreds of dollars for them to diagnose it if I don't have to. Thank you, Lisa ps. I don't drive the car daily, sometimes it sits for a week or so in the garage, not sure if that would be an issue or not.
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From: San Luis Obispo, CA
Thank you, I'm thinking of just having it done at the dealership in case there are any problems. I hate to pay the money, but I hate to screw something up and making it a bigger problem. I've been fortunate and not had to put any money into the car, it runs great and has been problem free so this once I'm thinking of just paying for the work.
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Well, yeah, depending on the dealer, you might not have any luck with them doing that, it's not a service book procedure, perhaps just clean it on the car, spray liberally with carb cleaner, and use an old toothbrush on the bits you can see.
I'm thinking of cleaning my throttle bodies soon, but I've seen some people had the high idle, not idling properly and throttle position problem thingy, etc. Why does that happen ? I've already bought a can of CRC throttle body cleaner and a microfiber cloth. Also what's the part number of the seal ring ? I tried looking #1404OEA on eBay and can't find anything.
Thanks
Thanks
Last edited by Jeremy1607; Nov 22, 2014 at 10:34 AM.
I'm thinking of cleaning my throttle bodies soon, but I've seen some people had the high idle, not idling properly and throttle position problem thingy, etc. Why does that happen ? I've already bought a can of CRC throttle body cleaner and a microfiber cloth. Also what's the part number of the seal ring ? I tried looking #1404OEA on eBay and can't find anything.
Thanks
Thanks
As to why some have trouble with throttle body cleaning while others do not,
it's truly an odd thing. Based on all the mixed and varied reports posted here and in other forums by those who've done it, I suspect there are just so many variables potentially involved that is hard to accurately quantify what the absolute best method is for success. I'm about to do it here soon for the first time myself, so I look forward to gaining some more personal insight. Good luck!
Last edited by vqsmile; Nov 22, 2014 at 01:19 PM.
Yeah, the high idle thing is a mystery. I've cleaned mine like 3 or 4 times in the last few years and never experienced high idle. My method is completely contradictory to the "proper" method. I just push open the butterfly, hold it open, spray the hinges and inside the tb liberally, take a tooth brush to the hinges, spray again and wipe out til its clean. Takes about 3-5 minutes.
I only open the butterfly once, maybe twice the whole time tho. Just keep it held open. That may be why I don't get the high idle.
I only open the butterfly once, maybe twice the whole time tho. Just keep it held open. That may be why I don't get the high idle.
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Joined: May 2015
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From: NYC
Did mine while changing plugs 63k. Didn't discount battery, but disconnected the harness to tb but did not move flaps. Just sprayed and wiped surrounding. Took 45 mins for both. Put back together and had idle and got the high idle code. The relearn did the job. BTW shops snapon tool can't reset this. Manual resets and dealer consult only.
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From: Louisville, Ky.
Garnet Ember G35X Sport EBC rotors LEDs GTR button Tail-as-Turn TBW undertray Alarm shock sensor
Try the ITB11-060 before the IAVL procedure
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.
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.
I cleaned both throttle bodies while during a spark plug change. I did not disconnect the
throttle bodies or the battery and still got the P0507 code and the 800-900 rpm issue.
After 5-6 tries at going through the:
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
PERFORM IDLE AIR VOLUME LEARNING
procedures with no luck I found out about ITB11-060. I pulled the passenger side MAF connector and got a P0102 code. I cleared the code using my ScanGauge II, went through
the processes again, still didn't work. I noticed on the ScanGauge that my Throttle Position Setting (TPS) was at 2%. I re-did the entire process again, this time pulling the driver side MAF connector. This time I got a P010C code, cleared it, performed the rest of the procedures, and my idle rpm went down to 700. Let the car sit off for an hour, restarted it and my idle speed was 637rpm as measured by the ScanGauge. And the TPS was at 1%.
I think I might have been too fast with the throttle valve closed position procedure the first time I did the MAF reset. But doing the MAF reset before the other procedures worked and my idle speed is within spec now.
I can verify that ITB11-060 " INTAKE AIR VOLUME LEARN WILL NOT COMPLETE" TSB worked for me on my 08 G35x Sport.
I cleaned both throttle bodies while during a spark plug change. I did not disconnect the
throttle bodies or the battery and still got the P0507 code and the 800-900 rpm issue.
After 5-6 tries at going through the:
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
PERFORM IDLE AIR VOLUME LEARNING
procedures with no luck I found out about ITB11-060. I pulled the passenger side MAF connector and got a P0102 code. I cleared the code using my ScanGauge II, went through
the processes again, still didn't work. I noticed on the ScanGauge that my Throttle Position Setting (TPS) was at 2%. I re-did the entire process again, this time pulling the driver side MAF connector. This time I got a P010C code, cleared it, performed the rest of the procedures, and my idle rpm went down to 700. Let the car sit off for an hour, restarted it and my idle speed was 637rpm as measured by the ScanGauge. And the TPS was at 1%.
I think I might have been too fast with the throttle valve closed position procedure the first time I did the MAF reset. But doing the MAF reset before the other procedures worked and my idle speed is within spec now.
I cleaned both throttle bodies while during a spark plug change. I did not disconnect the
throttle bodies or the battery and still got the P0507 code and the 800-900 rpm issue.
After 5-6 tries at going through the:
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
PERFORM IDLE AIR VOLUME LEARNING
procedures with no luck I found out about ITB11-060. I pulled the passenger side MAF connector and got a P0102 code. I cleared the code using my ScanGauge II, went through
the processes again, still didn't work. I noticed on the ScanGauge that my Throttle Position Setting (TPS) was at 2%. I re-did the entire process again, this time pulling the driver side MAF connector. This time I got a P010C code, cleared it, performed the rest of the procedures, and my idle rpm went down to 700. Let the car sit off for an hour, restarted it and my idle speed was 637rpm as measured by the ScanGauge. And the TPS was at 1%.
I think I might have been too fast with the throttle valve closed position procedure the first time I did the MAF reset. But doing the MAF reset before the other procedures worked and my idle speed is within spec now.
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ok Im going to be doing this, this weekend. I just want to verify a few things. Basically all I have to do is just unbolt the throttle body, Do NOT disconnect the battery,Do Not disconnect the connections to the TB and no need to have the ignition key on any specific position right?
Just unbolt, clean it, including being able to open the butterfly and just bolt back up? Am I missing anything here?
I have a 2006 G35 sedan....
Just unbolt, clean it, including being able to open the butterfly and just bolt back up? Am I missing anything here?
I have a 2006 G35 sedan....
