Great DIY! Did this for the first time in 120K miles and there were flecks coming off the throttle body. Replace the spark plugs and cleaned the MAF since I had things apart and it cured the rough idle that I was having. Now if only I can find a DIY to firm up the suspension, the car would be as good as new. Well, maybe not from the outside...

 

damn this is the first time you clean your TBs and it's done 120k

I can't imagine how dirty it must of been

 

I just cleaned mine, bought the car with a hundred K. And I'd llke to say, DO NOT CLEAN YOUR THROTTLE BODY's if you don't know what you're doing. Which was my case. It took me three days of going out there and trying to do a throttle body relearn to get my Idle back to normal. Don't freak out if you do ruin your idle. The relearn takes a lot of precision, a stop clock and patience. Boy was I happy when the car fixed itself, having to buy a new throttle body would have ruined my life.

 

^ What exactly did you do to have to go through the relearning procedure?

- Did you follow the instructions in the first page?

- Did you disconnect the harness connecter?

 

I didn't disconnect the harness, i left the car in the on position in the ignition. That may have been my mistake. The relearn is a bitch to pull off. I literally had to memorize the relearn before I finally got it and the car fixed its idle. Now i'm actually idling lower than my brother stock sedan.

 

It can take a few days for the idle to truly settle down, so don't freak out if it seems high after a relearn procedure. I noticed it while pulling up to a stop light. As the car slowed down, the revs would climb back up to 1000, maybe 1200. It didn't happen every time, but this went away within maybe 3 days.

 

Well it looks like this might have caused your problems.

The majority of people who've done this DIY haven't had this issue.

Also mine didn't take long for the idle to finally settle in, I think it took like 2 rides in the same day to get everything adjusted back to normal.

 

^ thats the prob., at least with the 2nd gen if the car is OFF and you dint disconnect the harness then you are good to go without doing the relearn.

 

great DIY, im going to do this soon when I install my new Gen 3.

side note, I called my dealer, Austin Texas Infiniti, and asked how much it would cost and what is all included in the TB cleaning.
I was quoted $200, and they do EXACTLY what this DIY says to do...

THANKS FOR SAVING ME SOME $$$

 

Thanks Q8y_drifter for the very helpful DIY!!

It's actually easier to clean two TBs on this car than one in a 4th gen maxima

Mine weren't even all that dirty @ 30K, but now they're spotless
(I've also cleaned teh MAF sensors) (used CRC TB cleaner and CRC MAF cleaner)

I didn't disconnect the any wires, but i did disconnect the battery and did the relearn procedure anyway. Looking good now.
But doesn't idle any better (probably because it was okay before (:P) )

P.S. when i asked the dealer to do this, the actual mechanic said that "Infi doesn't reccommend touching the TBs @ all".
Yeah, of course! The dealer would much rather you come in with a stalling car & then charge you $200 to "fix the problem"

 

sorry guys dint get back to you on the clean sooner, seems to have worked my idle no longer jumps and what not.....i did actually not install the skrews in properly and it made the idle worse till i saw that it was loose but its all good now

now if i could only find a way to stop this incessent clutch chatter!

 

^if i remember right you have the JWT aftermarket clutch and flywheel, in which case you cant not get rid of the "chatter" its a known characteristic of an Aftermarket clutch system on the G's.

I have OEM and have no such issues

 

I have over 50K miles on my G... and my idle has been like crap since last year. I have a feeling they're beyond dirty. lol

I'm gonna do this tomorrow. Thanks for the write up!

 

I had the same problems with my RPM randomly dropping down to almost stalling and then back up again. I thought something was terribly wrong with the tranny or something. Did this DIY today and problem fixed! Thanks so much OP

 

good work OP!