Carbon build up affecting idle
Jan 29, 2012 | 07:12 PM
#1
Carbon build up affecting idle
Hey guys,
So I was getting the sticky throttle when the car was cold so I clean the throttle body it was disgusting. So the car cooled down and then I drove it, worked like a charm but now I noticed the idle is at 1100-1200 rpm, before it was at 900 rpm, is it possible the carbon build up was causing the idle to be lower? The car has a tune, is it possible the previous owner was having issues with idle due to the carbon build up so he tuned the idle higher to counteract the effects of the carbon build up?
So I was getting the sticky throttle when the car was cold so I clean the throttle body it was disgusting. So the car cooled down and then I drove it, worked like a charm but now I noticed the idle is at 1100-1200 rpm, before it was at 900 rpm, is it possible the carbon build up was causing the idle to be lower? The car has a tune, is it possible the previous owner was having issues with idle due to the carbon build up so he tuned the idle higher to counteract the effects of the carbon build up?
Jan 29, 2012 | 07:41 PM
#4
I would disconnect the battery and re learn idle.
You now have adjusted/cleaned it up. eventually it will go back to normal, but disconnecting the battery will help it out faster.
You now have adjusted/cleaned it up. eventually it will go back to normal, but disconnecting the battery will help it out faster.
Jan 29, 2012 | 08:11 PM
#7
Hey guys,
So I was getting the sticky throttle when the car was cold so I clean the throttle body it was disgusting. So the car cooled down and then I drove it, worked like a charm but now I noticed the idle is at 1100-1200 rpm, before it was at 900 rpm, is it possible the carbon build up was causing the idle to be lower? The car has a tune, is it possible the previous owner was having issues with idle due to the carbon build up so he tuned the idle higher to counteract the effects of the carbon build up?
So I was getting the sticky throttle when the car was cold so I clean the throttle body it was disgusting. So the car cooled down and then I drove it, worked like a charm but now I noticed the idle is at 1100-1200 rpm, before it was at 900 rpm, is it possible the carbon build up was causing the idle to be lower? The car has a tune, is it possible the previous owner was having issues with idle due to the carbon build up so he tuned the idle higher to counteract the effects of the carbon build up?
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Jan 29, 2012 | 09:40 PM
#8
Sounds like you cleaned off the molybdenum dry lube from the throttle body. If the gap isn't that big the iac should be able to compensate and eventually the idle will work its way back to normal. You could also use evo scan and choose the idle screw button and set the idle screw on the throttle body to 800-900 from there and see how that goes. The best option would be to get some molybdenum dry lube and seal the plate back up. I bought a bottle of tomei throttle coat after making the same mistake you did by cleaning the throttle body and removing the dry lube seal.
Jan 29, 2012 | 10:00 PM
#9
Sounds like you cleaned off the molybdenum dry lube from the throttle body. If the gap isn't that big the iac should be able to compensate and eventually the idle will work its way back to normal. You could also use evo scan and choose the idle screw button and set the idle screw on the throttle body to 800-900 from there and see how that goes. The best option would be to get some molybdenum dry lube and seal the plate back up. I bought a bottle of tomei throttle coat after making the same mistake you did by cleaning the throttle body and removing the dry lube seal.
Jan 30, 2012 | 06:42 AM
#10
I was going to get molykote 321 as well but for some reason it is prohibited for sale in my state (NY). I had to find a vendor who was able to get tomei throttle coat from japan. Took three weeks but finally got it.
Jan 30, 2012 | 06:17 PM
#11
Jan 30, 2012 | 06:20 PM
#12
Sounds like you cleaned off the molybdenum dry lube from the throttle body. If the gap isn't that big the iac should be able to compensate and eventually the idle will work its way back to normal. You could also use evo scan and choose the idle screw button and set the idle screw on the throttle body to 800-900 from there and see how that goes. The best option would be to get some molybdenum dry lube and seal the plate back up. I bought a bottle of tomei throttle coat after making the same mistake you did by cleaning the throttle body and removing the dry lube seal.
Aug 30, 2012 | 08:07 AM
#13
Evolving Member
Joined: Apr 2012
Posts: 286
Likes: 0
From: Melbourne, Australia
sorry to revive an old post but i am having idle problems and was thinking of cleaning my throttle body along with my maf sensor
i have both crc throttle body cleaner and maf sensor, although i was only planning on taking the i/c pipe off and spray the throttle body lightly and wipe with rag. but from the more i read i am starting to think it may not be worth cleaning at all :S ??
what did you guys end up doing ?
i have both crc throttle body cleaner and maf sensor, although i was only planning on taking the i/c pipe off and spray the throttle body lightly and wipe with rag. but from the more i read i am starting to think it may not be worth cleaning at all :S ??
what did you guys end up doing ?
Aug 30, 2012 | 07:12 PM
#14
it will work, thats what cured my issue, I eventually took off the throttle body to do the seals and really cleaned it up. Throttle feels great at any engine temp now.
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