When i cleaned both of my TBs i didn't disconnect the battery like an idiot+ i moved the butterfly, but my problems where no way near as bad as you make your sound like..

I had small rpm issues, mostly when the gear would change it would be a hard shift; for example the rpm would jump higher then it should and fall back down and vise verse when slowing down.(my car is an auto btw)

It was not so bad that it worried me and over time it got better 1-2 weeks and it was like new. I never did a ecu reset or anything either.

If i where you i would wait it out. And if it doesn't get better TB's are something you can buy cheap from CL and replace yourself easy.

 

so did he fix his TB ?lol

 

I ended up buying that TB from Autoparts.com and it seems pretty legit. It seems like it is in fact and OEM Hitachi TB and I only payed $225 for it conpared to Everythingg35's price of around $600. We will see how it holds up. If it breaks I'll defiantly post and let people know. I put it in and went through the all the manual relearning processes but still no luck. I took it to my shop and they used whatever equipment they have to try and get it to reset but still couldn't do it.

Bythabay, I haven't been to the dealer yet just because I'm afraid they are gunna charge me a ton of money to tell me what I ready know and do nothing but I'll eventually go to them if it doesnt get better with-in the next few weeks.

Vqsmile, thanks for the service bulletin! I missed that one. I tried it myself and even printed it out and had the shop try it but no luck.

After I picked it up from the shop and they told me they couldn't fix it I decided to just drive it for a few weeks and see if that brings the rmps down. I've been driving it for 4 days now, 120 miles a day (my commute) and haven't seen any change yet. I am getting something that feels like a had shift whenever i touch the accelerator or let my foot off it. Might be similar to what Mike 45 was experiencing.

If the issue doesn't work itself out by in the next 2 weeks or so I'm going to try a shop the specialized in infinites but is not a dealer.

 

I did exactly the same thing... cleaned the bodies by removing them from the intake, moved the butterfly and then ended up with the fluctuating RPMs + CEL...

I was too busy to go to the dealer during the following weeks so I just drove it like that and sometime during the 2nd week the CEL cleared and the engine settled down. I think it took about 10 days for this to happen so be patient!!! It may take less time but I kept trying to pull the battery, reset the ECU, relearn the flap positions, etc, etc... none worked but I probably restarted the learn process all over again. Note that during this time I also romped on the throttle to have some fun but also, probably, to subconsciously blow up my car out of frustration... point being: maybe some hard driving is is order

I've read that replacing the TBs does nothing since the issue is in the ECU.
Sunil

 

Good to hear there is still hope! I'll give it a few weeks.

 

Give it some time for sure, but even if the problem doesn't clear itself don't think that replacing the TBs will solve the problem. I did a lot of reading and the problem is in the ECU. Aside from that, moving the flap on the TB can't really harm the servo motor that drives the flap. If you know anything about servo motors, you know they are pretty robust and are actually designed to take load. One Infiniti mechanic noted that the real issue is that after cleaning the TB, too much air is getting past the flap and the ECU misinterprets this as a TB leak (thus the CEL).

I suspect that people who replaced the TBs and "solved" the problem were duped into buying them so that the dealer or mechanic could make a profit on them, but the real solution was to connect the ECU to the Consult system and do the magic there.

 

I brought the car to the shop and was told the left TB was not responding and needs to be replaced. I trust they guy I go to, always been far and didnt charge me the second time because he couldn't fix it. I've done some robotics work, and an pretty familiar with servos and I was surprised that would damage it myself but It is hat it is. I bought and replaced the TB on my own.

I also read about the ECU being the problem which makes me wonder if I should stop doing the reset process. When yours went back to normal had you continue to try the reset process on a daily basis or just let it be. I'm afraid everything I try the process it clears any progress made in relearning through driving it.

 

Me too My son was big into robotics and if a servo ever failed it was due to outright abuse or improper application (which is abuse anyway). But other than nylon gears sheering, I never saw a server get damage by manually moving whatever it was attached to (powered on or off).

Leave it be or it will never learn. I just left it alone and put up with the idle fluctuations and weird shifting until it settled down.

Sunil

 

What is the condition of your battery? I recall there were reports of another issue where a weak battery/charging system could cause a slightly low-voltage condition which, under the right circumstances, could prevent the ecu from completing the relearn cycle. Just a thought.

 

**UPDATE**

The car finally seem to be returning to normal!! Took a lot longer than I expected but it rarely jumps in rpms anymore. It still has a bit of a high idle but that was typical before the incident. The only thing that doesn't seem to be fixing itself is the lurch when i let on and off the gas. We'll see how things play out in the next few weeks. So far the TB i bought from Autoparts.com seems alright.

 

It will go back to normal, its still learning yet

 

The new throttle body has to be programmed and then the idle relearn procedure has to be performed by dealer or you

 

I brought it to the shop and had them do the programming. It still would not relearn so I stopped trying the relearn procedure and just drove it. It is now running better than ever with smoother acceleration and lower idles and all the issue caused from replacing the TB are gone.

 

I'm glad to hear that, good luck. It is such relief knowing your car running like normal again