Yet another throttle body cleaning problem
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Joined: Jan 2021
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infinity g35 sedan sport manual transmission
i’ve also been experiencing something similar.
Posted this in the DIY section w/no response, hoping for feedback here.
Count me in the Nissan victim for unenlightened throttle body cleaners. Over the last year I moved to Ohio and got two used G35X's (2007 & 2008). My 2007 just rolled over 100k so I decided to put in new plugs. To do so you have to remove the throttle body (to access coil pack under them) so I was able to clean them while off. I've cleaned throttle bodies for years w/no problems but this is my first time doing the infinity's. I did not unplug anything (including the negative battery terminal which in hindsight should have done since I was unplugging the coil pack). After putting it back together I have a high and surging idle. Reading thru most of the 27 pages of this forum, I went out and disconnected negative battery, and then went thru the complete relearn procedure. I don't have an SES light on; only the high and surging idle (between 1200-2200 up and down w/engine fully warm). My only problem in the relearn procedure is the step 4-6 in the ECU reset procedure:
http://www.technosquareinc.com/350reset.htm
When I release the accelerator pedal w/CEL blinking, it will stop on its own and go solid. Of course when I complete the process anyway and start it, I have no SES light on. So am I resetting this properly or not? Not clear that I even need to do this part if I don't have an SES light on, but the the throttle relearn says you have to do this first. When I do the throttle position learning at the end of the link above, I can do all those steps, but I still have the surge.
I did go out an drive it last nite very aggressively and it may have tightened the surge range a bit. Going to drive today and see if it improves any. If it doesn't get better I will take it to a mechanic that can do the relearn, although if I'm doing the process above correctly don't know what his reset will do that this doesn't. Hard to imagine damaging the TB's; although many posters seem convinced you can by cleaning. Any other suggestions based on my description of the problem.
UPDATE: Drove it to yesterday, filled w/gas, and did several WOT runs. Seems to run good anytime RPM>2000. It did decelerate nicely as I got into work to about 1200, but then shortly started the herky jerky between 1200-2200. Hopefully will learn more over the next couple of days. Same thing on way home. Driving again this a.m.
Count me in the Nissan victim for unenlightened throttle body cleaners. Over the last year I moved to Ohio and got two used G35X's (2007 & 2008). My 2007 just rolled over 100k so I decided to put in new plugs. To do so you have to remove the throttle body (to access coil pack under them) so I was able to clean them while off. I've cleaned throttle bodies for years w/no problems but this is my first time doing the infinity's. I did not unplug anything (including the negative battery terminal which in hindsight should have done since I was unplugging the coil pack). After putting it back together I have a high and surging idle. Reading thru most of the 27 pages of this forum, I went out and disconnected negative battery, and then went thru the complete relearn procedure. I don't have an SES light on; only the high and surging idle (between 1200-2200 up and down w/engine fully warm). My only problem in the relearn procedure is the step 4-6 in the ECU reset procedure:
http://www.technosquareinc.com/350reset.htm
When I release the accelerator pedal w/CEL blinking, it will stop on its own and go solid. Of course when I complete the process anyway and start it, I have no SES light on. So am I resetting this properly or not? Not clear that I even need to do this part if I don't have an SES light on, but the the throttle relearn says you have to do this first. When I do the throttle position learning at the end of the link above, I can do all those steps, but I still have the surge.
I did go out an drive it last nite very aggressively and it may have tightened the surge range a bit. Going to drive today and see if it improves any. If it doesn't get better I will take it to a mechanic that can do the relearn, although if I'm doing the process above correctly don't know what his reset will do that this doesn't. Hard to imagine damaging the TB's; although many posters seem convinced you can by cleaning. Any other suggestions based on my description of the problem.
UPDATE: Drove it to yesterday, filled w/gas, and did several WOT runs. Seems to run good anytime RPM>2000. It did decelerate nicely as I got into work to about 1200, but then shortly started the herky jerky between 1200-2200. Hopefully will learn more over the next couple of days. Same thing on way home. Driving again this a.m.
i’ve also been experiencing something similar. I had a misfire so I change the all the coil packs and spark plugs, obviously you have to remove the throttle bodies to do so. I never unplug the toilet buddies I kind of just let them hang and after I had finished the car started and route to fine but still had a misfire. so i thought about maf i unplugged and nothing changed, so i went to go drive it and had zero throttle response. my car starts and runs fine, but when i press the gas pedal it only revs to 1200? i’ve disconnected the negative terminal overnight, put the positive and negative terminals together to reset the ECU, also did the ECU reset when you have to press the pedal five times light off for however many seconds and so on. nothing has worked and i’m kinda stumped. did i put it in limp mode, blow out the throttle body sensors or the APP sensor in the gas pedal. i am getting codes and they are - P0643, P0447, P2128, P2138. i’ve cleared codes turn the car on and still have a cel, when i check only the P0643 and P0447 come back. any ideas ?
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Joined: Mar 2007
Posts: 702
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From: Delano Mn
I just R & R spark plugs last nite, just under 78,000 miles, OEM plugs, they looked fabulous! all were .045" or so. Cleaned the TB's as best I could, with a q-tip, and spray cleaner, and shop rags did NOT move butterfly and did NOT unhook neg. terminal on battery. The car runs at least as good as it did prior! btw, put in those NGK Laser Iridium plugs @ $20.00 bucks a pop!!!
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