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DIY: Clean your Throttle Bodies

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DIY: Clean your Throttle Bodies

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Old 02-11-2018, 09:51 PM
  #346  
Gio37
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Originally Posted by PNW_IPL View Post
Wow. Worse than I thought. Moved butterflies a tiny bit. Car idles better and throttle response is smoother. No longer have to floor it to pick up nominal speed. Very happy man. No codes. Didnt go crazy with cleaner only sprayed on towel and q tips and wiped. Also wiped inside plenum as best I could. No codes no weird issues.
Nice
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Old 03-16-2018, 09:50 AM
  #347  
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Originally Posted by m3clubracer View Post
Thanks! Glad you wrote this and not me. This should be re-written to include this from the start. Once I read this from the top of this page and heard that there was surging I knew it was due to air leaks. I am a launch manager for a company that makes intake manifolds for Honda. Their manifolds and TB are the same. Nylon manifolds with heat inserted nuts, same gaskets, and drive by wire TB. I can't stress enough that the proper torque sequence be applied or you will strip the inserts and it will leak or gasket will "bunch" at the 4th bolt and leak. If you take the gasket out (or knock it out with a rag or whatever) you MUST put it back in with the tongue (witness tab) first and sliding two fingers around to install the rest of the gasket at the same time. If not that tongue may cause a leak due to improper install. It happens at our leak test every time we get someone new installs them without this method. As for "touching/moving" the butterfly valve, it make no difference, go ahead and move it just don't disconnect the TB or the learned home position must be relearned by the ECU - in all cars. I have seen people in my mechanic days use a rag with straggling bits or terry cloth to clean and leave chunks of the rag in between the TB and valve and it cause high idle also.

I hope someone has the time to retype all this and it get re-stickyed.

BTW many forums have a thread with links in categories to the best threads involving DIY or problems/fixes etc. I will suggest it in the suggestions area.
I just reread this thread as I'm getting ready to do this again for the 4th time since I bought my G...my idle relearn issues were so severe I had to do a little something extra (that I think needs its own explanatory thread and may be a little advanced for some people so I wont post it here) to fix the idle after....


that begin said I can't believe how long this thread has been going with completely contradictory advice all over it.... in all of it, this post (#286) with the quoted post in it (#276) are the most useful 2 posts and should really be at the head of this sticky so people don't have to read though 24+ pages of contradictory advice.
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Old 04-01-2018, 08:50 AM
  #348  
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Pulled mine apart yesterday, didn't disconnect the battery. The throttle bodies themselves were quite dirty, as I believe its the first time its ever been cleaned(2011 63.5K miles) I cleaned everything up nice, put it all back together, no CEL. car seems to be idling and shifter smoother
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Old 04-14-2018, 03:46 PM
  #349  
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I just cleaned my TBís and MAF sensors and now my Service Engine Soon light is on. I disconnected the battery sprayed the MAFís let them dry and plugged them back in then took TBís off (only disconnecting the one hose on each air tube) cleaned them good and bolted them back on and reconnected everything. Started it up it stayed around 2k for a couple seconds them came down to 1k I dove it about 10 min and idle bounced around between 900-1500 when I would press clutch in and/or stop. I turned it off then back on and SES light came on. It idles right around 650 when I start it but still around 900 when I drive it and press clutch in when slowing to a stop. What went wrong? I only have 41k miles TBís were a little dirty but now I wish I didnít mess with them never knew they would be so sensitive. Any suggestions? Thanks.
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Old 04-15-2018, 10:36 AM
  #350  
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I didn't mess with the MAF sensors...maybe that's whats causing your issue. I just cleaned out the throttle bodies as I mentioned in my post. My G fired right up ...good luck to you
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Old 04-15-2018, 03:12 PM
  #351  
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Originally Posted by All G'd Up View Post
I just cleaned my TBís and MAF sensors and now my Service Engine Soon light is on. I disconnected the battery sprayed the MAFís let them dry and plugged them back in then took TBís off (only disconnecting the one hose on each air tube) cleaned them good and bolted them back on and reconnected everything. Started it up it stayed around 2k for a couple seconds them came down to 1k I dove it about 10 min and idle bounced around between 900-1500 when I would press clutch in and/or stop. I turned it off then back on and SES light came on. It idles right around 650 when I start it but still around 900 when I drive it and press clutch in when slowing to a stop. What went wrong? I only have 41k miles TBís were a little dirty but now I wish I didnít mess with them never knew they would be so sensitive. Any suggestions? Thanks.
Do a full ECU reset. A battery disconnect won't suffice.
Sometimes when manipulating the TB, especially when the battery has been disconnected, you may throw off the throttle valve position sensor.

there's some explanation in this thread about how to reset it. There's also a DYI for it.

Try the full ecu reset or at least the throttle valve position sensor reset. and see if that helps.
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Old 04-16-2018, 09:18 AM
  #352  
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^^
lol this thread IS the DIY on it
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Old 08-01-2018, 02:35 PM
  #353  
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My car was idling rough at times so I went ahead and popped off both TBs and they looked pretty damn bad. From the looks of it, it's never been cleaned. Had extra TB cleaner and cleaned it. Didn't feel the need to disconnect the battery and I moved the butterfly valve carefully. I sprayed TB cleaner onto a rag and cleaned it. I heard spraying it directly onto the TB could damage them. Did the whole 3 step relearning process and now she runs SMOOOOOOTH. Looks like I'm going to be doing this every so often.
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Old 09-18-2018, 06:09 PM
  #354  
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Did this today. Did NOT disconnect batteries. Did NOT disconnect wiring to TB. Removed hose, removed TB and cleaned both sides. Opened up butterfly to thoroughly clean. Also sprayed rag and wiped down intake area. Did NOT spray inside of it though. Put back together and started car. Started right up, idled high for about 2 mins, then dropped right where its supposed to be. No check engine light. What a difference. Car has 67k on it. Prob never been done. Seems like more power w/o hesitation. Throttle seems less sticky or hesitant. Couldnt be happier.....
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