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Old 03-17-2011, 11:19 AM   #1 (permalink)
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Default Surging idle?

Hey guys

ive been trying everything to fix my idle but cant seem to find out what is causeing it. it only does it when its warmed up. when it goes up and down it does it slowly 1500-2000. it also runs really rich at idle. ive switched my IACV. Bleed my coolent system ( searched and found that a air bubble can cause it) I have no codes... The only thing that i found that fixes it is adjusting the tps, but when i do, it idles perfect and smooth, but when i decel and let the engine slow the car down it dosent lean out it just keeps giving it fuel????? any ideas
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Old 03-17-2011, 11:56 AM   #2 (permalink)
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Nope, I'm clueless myself because I have the same problem with my b7 a6 cam setup. Maybe I just need a tune to fix it.
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Old 03-17-2011, 12:51 PM   #3 (permalink)
OMG TOTALLY COOL TITLE!!!!
 
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i had that problem in my old ed hatch, turned out it was my idle screw on the throttle body, also might wanna check the plug on your IACV that could be dirty not making contact?
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Old 03-17-2011, 07:36 PM   #4 (permalink)
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Is it turbo? Might of went out of tune
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Old 03-18-2011, 10:58 AM   #5 (permalink)
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its supercharged
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Old 03-18-2011, 02:23 PM   #6 (permalink)
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Do you have a FITV?



If you have that part on your throttle body then remove the little plate cap on the firewall side, then tighten the little white plunger inside by threading it in with a screwdriver or quarter.
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Old 03-18-2011, 08:30 PM   #7 (permalink)
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nope i have a b16 throttle body so its gone :P
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Old 03-19-2011, 11:08 AM   #8 (permalink)
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bump
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Old 03-19-2011, 11:38 AM   #9 (permalink)
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air bubble....i had a bad one 99ej6t traced it to air bubble in the heater core i also have a b16 tb i would say pm him about it so he can get into detail about it
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Old 03-19-2011, 12:29 PM   #10 (permalink)
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how could i bleed it out?
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Old 03-19-2011, 02:52 PM   #11 (permalink)
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jack the front of the car into the air and then let it run with the rad cap off. turn the heat on full blast defrost and rev the engine up every once and a while and just hold the rpms up a bit.

If you can get one of those spill free rad cap funnels they're handy.

I've always done it this way.
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Old 03-20-2011, 07:14 AM   #12 (permalink)
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ok tired bleeding it that way for about 15-20 mins and nothing. i also used a volt meter and dialed in my TPS sensor nothing... any other ideas? also i read on here that if i unplug my IACV and if it shuts off that i have a vac leak. is this true?
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Old 03-20-2011, 07:52 AM   #13 (permalink)
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are you sure there is no FITV? My b16 throttle body had one, it isn't a d-series exclusive part.

Just wanna make sure you actually went and checked.
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Old 03-20-2011, 08:38 AM   #14 (permalink)
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Yea im 100% sure that it does not have one
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