DO NOT CLEAN 02/03 Thottle Body
So I'll admit that I did clean the TB and moved the plate... Now I have that rough idle. Odd thing is, this morning I was driving to work and my started having intermittent hesitation. My CEL has been on due to P0138 O2 sensor high voltage since I put the car back together this weekend. This morning the CEL started blinking then came back on solid. Could this be related to the TB? or a problem with my MAF?
Originally Posted by DaBoxSE
So I'll admit that I did clean the TB and moved the plate... Now I have that rough idle. Odd thing is, this morning I was driving to work and my started having intermittent hesitation. My CEL has been on due to P0138 O2 sensor high voltage since I put the car back together this weekend. This morning the CEL started blinking then came back on solid. Could this be related to the TB? or a problem with my MAF?
Sounds like it all ties together...now just where to start. My ex's 2k had similar problems. I replaced the MAF in her car and all was fine after that. Wondering if that could be the case for me. I've replaced my MAF once before, but I dont doubt I need a new one...
Originally Posted by soonerfan
which means there is unburnt fuel which is bad for the cat
Originally Posted by NmexMAX
I would focus more on the problem at hand rather than what the aftermath is. You're disappointing me sooner, thought/hope you'd know better than this
the point i was making was...fix the problem before you *** up the cat (which is expensive especially if its the precats).
to fix the problem - plugs and/or coils
I just changed the plugs this past weekend. Put in Denso Iridium plugs. So it must be the coils then? I never had a problem with them before... I have just spent a ton of money on the car last week to fix the tranny, clutch, seals etc...kinda disappointing that it looks like I need to spend hundreds more on other things. Ok, i'm done complaining.
Senior Member
Joined: Dec 2002
Posts: 143
I wanted to get everyone's opinion on cleaning the throttle body a while ago but have been undecided on whether I should try it or no. Now I am glad I have not done it.
http://forums.maxima.org/showthread.php?t=510889&page=2
I wonder if disconnecting the battery before cleaning it would make any difference...does anyone know?
http://forums.maxima.org/showthread.php?t=510889&page=2
I wonder if disconnecting the battery before cleaning it would make any difference...does anyone know?
Originally Posted by Whiggy
I wonder if disconnecting the battery before cleaning it would make any difference...does anyone know?
Originally Posted by Whiggy
I wonder if disconnecting the battery before cleaning it would make any difference...does anyone know?
my battery was disconncted and the TB was disconnected from the wire harness...thats why I thought it would be ok.
Originally Posted by NmexMAX
I clean mine all the time
sooner, did you do what I have stated time and time again works for me? It's not in your 'I did this items.
The last time I had throttle issues it was due to wiring mishaps w/ SAFCII, and using data scanning software, I was able to pinpoint the problem. Using live feed, I monitored APPS 1&2, and TPS 1&2. A problem will exist if either 4 of those sensors sends out an erratic (not within spec) signal.
The last time I cleaned my TB, prior to SAFC mishap, I let the car sit for 35 hours w/ the negative terminal disconnected, and it was fine after that and an IAVL.
I clean mine every 30k miles.
well lets see. I made the same mistake as you. however instead I just unplugged the battery and let the car sit for a few hours. plugged it back in. did throttle re learn and ecu clear. drove around for some time. and did it again and car was fine..
Originally Posted by Decoy036SPD
manually removing the butterfly does not cause problems....
you wanna elaborate?
thats why everyone on here agrees that is is bad?
thats why five dealerships that I have talked to say it causes problems?
I cleaned my tb (i didnt remove the butterfly tho.. i opened it a few times)and my after i got a CEL and my idle was always at 1000. I did the ecu reset a bunch of times. The idle would drop but after i turn off the car then start it back up it'll be back at 1000. Then i disconnected my battery for 24 hours, and now its fine.
Senior Member
Joined: Oct 2006
Posts: 103
If you are so afraid of the TB cleaning, take it to the stealership - they charge $99 for this service and should keep in things order.
When I did mine, I got the high idle, took it to the dealsership and asked them to do a TB Clean service, which they did and the idle was reset using the Consult.....
When I did mine, I got the high idle, took it to the dealsership and asked them to do a TB Clean service, which they did and the idle was reset using the Consult.....
Originally Posted by soonerfan
really?
you wanna elaborate?
thats why everyone on here agrees that is is bad?
thats why five dealerships that I have talked to say it causes problems?
you wanna elaborate?
thats why everyone on here agrees that is is bad?
thats why five dealerships that I have talked to say it causes problems?
Originally Posted by Decoy036SPD
I removed the butterfly plate. it set off a check engine light. I tried relearning the throttle body and ecu to no avail. I then unplugged the ecu for several hours. I then relearned the throttle body and ecu and the car worked perfectly. ever since for at least 4 months.
Originally Posted by NmexMAX
You never did try and d/c the battery for a long amount of time, (Couple days), or did you?
i disconnected the battery when i did the coils and left it disconnected until the next day (about 32 hours)
Originally Posted by soonerfan
Cliff notes: Do not clean the "drive by wire" throttle body because it could end up costing you a lot of money.
I made the mistake of cleaning the TB (and moving the plate) and afterwards the idle was messed up (it was high and erratic). I tried the throttle position relearning procedures (for the TB) to no avail. I went to the dealership for them to do the relearning procedure to the ECU ($98) and they werent able to do it because of the erratic idle. I had to replace the TB assembly which cost around $300 (I talked my way down from over $400). The relearning procedure still wouldnt take because of the erratic idle and a cylinder misfire code (from a preexisting coil problem). I ordered all 6 coils from daveb ($380) and installed them.
I went back to the dealership this morning and even though the idle is better with the new coils, the procedure still wouldnt take. The service manager decided that there is actually a problem with the ECU. Since the throttle was messed up, to much power was going to the part of the ECU that processes the idle/throttle and burned out a circuit preventing it from accepting the relearn. They ordered a new ECU that (thank god!) is being covered by the emissions warranty.
All of this because I cleaned the TB.
MODS: Please make this a sticky or add the link to a preexisting sticky
I made the mistake of cleaning the TB (and moving the plate) and afterwards the idle was messed up (it was high and erratic). I tried the throttle position relearning procedures (for the TB) to no avail. I went to the dealership for them to do the relearning procedure to the ECU ($98) and they werent able to do it because of the erratic idle. I had to replace the TB assembly which cost around $300 (I talked my way down from over $400). The relearning procedure still wouldnt take because of the erratic idle and a cylinder misfire code (from a preexisting coil problem). I ordered all 6 coils from daveb ($380) and installed them.
I went back to the dealership this morning and even though the idle is better with the new coils, the procedure still wouldnt take. The service manager decided that there is actually a problem with the ECU. Since the throttle was messed up, to much power was going to the part of the ECU that processes the idle/throttle and burned out a circuit preventing it from accepting the relearn. They ordered a new ECU that (thank god!) is being covered by the emissions warranty.
All of this because I cleaned the TB.
MODS: Please make this a sticky or add the link to a preexisting sticky
I had to clean my TB again when my intake sucked up some water. I then too had a high idle and it fixed itself.
You can clean it, but you will get an SES light for a while.
Originally Posted by MaximaPolak
You should have driven around on it, and it would have fixed itself...when the cleaning your TB threads started to come out a long time ago, I thought to myself, "why not?". I cleaned the TB and had the high idle...went to the dealer. They told me I needed a new ECU then a new TB and finally I got so pissed I just went home. After a 100 or so miles (on my way to Florida from Jersey) the SES turned off and the idle was back to normal.
I had to clean my TB again when my intake sucked up some water. I then too had a high idle and it fixed itself.
You can clean it, but you will get an SES light for a while.
I had to clean my TB again when my intake sucked up some water. I then too had a high idle and it fixed itself.
You can clean it, but you will get an SES light for a while.
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Joined: Oct 2005
Posts: 33
i have also once cleand my tb and a couple of days after the idle was high around a (1100) and it had a engine light as well tryied to replace the idle sensor nothing went to the dealership to see what the problem was and they said coils and ecu around a 1200$ worth of work which i said no way. i tried to unpulg the battery from the terminals and would last about 100k unitl engine light would show again I kept driving the car for about 3 months after same problem high idle. During the 4th month i started my car one morning and nothing no light nice idle around (550) since this i have been driving my car for about a year and a half and been all good. It is very bizzare that this has happened but ive heard other stories of this happening. i own a 2000 max
Originally Posted by Project323
as many times i've done cleaning/removing TB and intake and all related to this, i never EVER had any issues with idle/ecu.
Thread title = "Do not clean 02/03 throttle body"
Your car = 2000 Pearl White
Member
Joined: Aug 2002
Posts: 251
Originally Posted by steven88
...if you put it to reverse with IGN on...stepping on the gas will move the throttle plate...
Actually i don't see why we would.