I'm guessing the reason is because unlike a TPS, our throttle bodies have servos in the sensors, which control the opening and closing of the plates. The servos need to know, i.e. learn the exact position of the plates in order to properly control them. Every other sensor, such as MAF and TPS etc. are merely readers.
That's about as much logic as I can spit out at the moment. Someone please correct me if I'm wrong.

 

I disconnected my battery first and then the TB harness. Cleaned the TB out in the yard. Brought it back into the garage and hooked the TB harness first. Bolted everything back and then hooked the battery up. No problems for me. When I was cleaning the TB I fully opened the butterfly plate.

I did have one issue. I forgot to hook my MAF up. So when I started the car, the car stalled. I was like oh ****! I hook up the MAF and re-try, the car starts fine. RPM is good, but I had the SES light on. I said screw it I'll do it later. Next week I unplug the battery for an hour or so and the SES light is gone.

 

I think my car is back to normal now, I haven't felt the funny jerk when coming to a stop. The CEL also went away on its own. Now I am happy again.

 

^ good to hear, maybe the car was just relearning your driving habits after teh reset, keep an eye out for it for another few hundred miles and keep us posted.

 

anyone figure out whats making some people have high rpms and why others are having success with cleaning yet?

 

^ nope not yet, seems like a lot of different ppl did different things and some got away with it but others didnt... there HAS to be a common issue here that everyone is overlooking, hope ppl can pitch in their experiences and figure this out.

 

ugghhh... i guess theres no choice but the dealer. God i hate the dealer.... last time i went there i walked out with 2 scratches.

 

I'll start off and say exactly what I did, I didn't disconnect battery or throttle bodies and used a throttle body cleaner and sprayed on a microfibre cloth then wiped the throttle bodies. I used my finger to push open the plate. I also sprayed very little of that cleaner on the cloth and wiped about an inch from the edge of the inside of the engine opening. I let everything dry for about 5-10 mins before screwing everything back (cleaned one side at a time). Made sure everything was tight but not over tighten. I didn't take out or clean the MAF sensors. After, I started the car to let warm up for 5-10 mins and car started to do the idle fluctuation and I got the high idle and CEL for a couple of days. Everything seems to be fine now after I did the relearn and it seemed to kick in a few days later. I have a 2007 G35x sedan with 160,000KMs and stock.

 

 

I'll start off and say exactly what I did, I didn't disconnect battery or throttle bodies and used a throttle body cleaner and sprayed on a microfibre cloth then wiped the throttle bodies. I used my finger to push open the plate. I also sprayed very little of that cleaner on the cloth and wiped about an inch from the edge of the inside of the engine opening. I let everything dry for about 5-10 mins before screwing everything back (cleaned one side at a time). Made sure everything was tight but not over tighten. I didn't take out or clean the MAF sensors. After, I started the car to let warm up for 5-10 mins and car started to do the idle fluctuation and I got the high idle and CEL for a couple of days. Everything seems to be fine now after I did the relearn and it seemed to kick in a few days later. I have a 2007 G35x sedan with 160,000KMs and stock.

 

how much you think the dealer would charge to clean the TB's and make sure it runs good ?

 

Some people said around $200.

 

I am gonna back door a warranty claim so I don't pay.... I just hope the mechanic actually does a competent job cleaning it and not a half assed attempt

 

so, i came back from my dealer... they replaced the MAF (which did diddly squat) and even though i mentioned it many times, they insisted that the throttle body in a g35 is NOT designed to get dirty and its highly unlikely. even though the mechanic was taking apart and removing the MAF, he didnt even bother cleaning or inspecting the throttle body to rule it out.... He also stated that the RPM fluctuations are from bad sprockets, and told me that poorly maintained car can cause this (mean while my car is maintained by the dealership and i have all the records)

So, i came to the conclusion that the dealership is RETARDED... and will be cleaning my own TB. My question after reading the entire thread AGAIN is that it seems like some unhook the battery before, and some leave everything alone... what is the best way so i dont have the high idle or have this simple procedure turn into a nightmare? recommendations?

 

^ there are no guarantee's really, i did it without an hooking the battery with no probs while some unhooked it and had no probs while some didnt unhook the battery had probs... why is it so weird is anyone's guess...