 Rough idle - smooths out when I drive (going insane) |
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 Apr 19, 2011 - 8:59 PM
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Enthusiast  Joined Feb 28, '11 Currently Offline Reputation: 5 (100%)  |
QUOTE (csscza @ Apr 19, 2011 - 3:23 PM)  Im following along mine just got back on the road and is now vibrating at idle a little once in awhile harmonic balancer |
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Sep 28, 2011 - 12:46 PM
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 Enthusiast Joined Mar 27, '04 Currently Offline Reputation: 14 (100%) |
having a similar issue.. haven't really done much yet cuz not sure where to start... my car starts fine.. idles around 1200 or so until it slowly drops to the 700 or so normal.. but then it will start dipping VERY low on RPM and almost die (like 200-300rpm).. but will keep running.. very rough idle... then after i drive for a few miles, its still running a little rough, but is back to idling around 600-700... any ideas??
5sfe - 5spd This post has been edited by Jaws4God: Sep 28, 2011 - 2:22 PM -------------------- ~Daniel~ No Longer Celica Owner.. moved on to a 03 WRX-EJ207
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Sep 28, 2011 - 7:59 PM
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 Enthusiast Joined Mar 22, '07 From Houston, TX Currently Offline Reputation: 4 (100%) |
on the rear of the throttle body theres a small plate thats mounted/shaped similar to the TPS.
loosen it and rotate it. it will adjust the minimum opening angle of the idle control valve -------------------- QUOTE "And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH 1994 GT: V6 swap, 5speed E53 W/ LSD, All Power, now RED 1995 ST: SOLD @273k miles, Auto, all power, CarPC, White 1994 ST: Totaled, 5spd, all power, Red RIP 07/09/09 @ 241,810 1994 Lexus LS400: This is my new DD |
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Sep 28, 2011 - 8:19 PM
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Enthusiast Joined Mar 27, '04 Currently Offline Reputation: 14 (100%) |
QUOTE (stephen_lee @ Sep 28, 2011 - 8:59 PM) on the rear of the throttle body theres a small plate thats mounted/shaped similar to the TPS. loosen it and rotate it. it will adjust the minimum opening angle of the idle control valve thanks! i found that and adjusted it so now it idle's around 1000... so hopefully if it tries jumping down low on RPMs, it will still have plenty of RPMs left.. however it is still running a little rough.. like i have a miss-fire.. so not sure if its still a vacuum leak.. or spark plug.. spark plug wire... etc... not sure what how to test next... -------------------- ~Daniel~ No Longer Celica Owner.. moved on to a 03 WRX-EJ207
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Sep 28, 2011 - 9:09 PM
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Enthusiast Joined Mar 22, '07 From Houston, TX Currently Offline Reputation: 4 (100%) |
QUOTE (Jaws4God @ Sep 28, 2011 - 8:19 PM) QUOTE (stephen_lee @ Sep 28, 2011 - 8:59 PM) on the rear of the throttle body theres a small plate thats mounted/shaped similar to the TPS. loosen it and rotate it. it will adjust the minimum opening angle of the idle control valve thanks! i found that and adjusted it so now it idle's around 1000... so hopefully if it tries jumping down low on RPMs, it will still have plenty of RPMs left.. however it is still running a little rough.. like i have a miss-fire.. so not sure if its still a vacuum leak.. or spark plug.. spark plug wire... etc... not sure what how to test next... i would do a tune up if it feels like its misfiring -------------------- QUOTE "And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH 1994 GT: V6 swap, 5speed E53 W/ LSD, All Power, now RED 1995 ST: SOLD @273k miles, Auto, all power, CarPC, White 1994 ST: Totaled, 5spd, all power, Red RIP 07/09/09 @ 241,810 1994 Lexus LS400: This is my new DD |
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Nov 14, 2011 - 9:20 PM
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Enthusiast Joined Mar 16, '11 From VA Currently Offline Reputation: 0 (0%) |
QUOTE (97Supra @ Apr 7, 2011 - 4:55 PM) The hard idle set screw is what the throttle pulley rests on, (half moon that the cable is attached to) comes to a stop at one end of the screw. There is a small nut to loosen it up and it is a small metric alan key which turns it if i recall correctly. The throttle position sensor will be out of sync if you change the hard idle. You might want to switch those vaccuum lines on a/c vsv located on the wall. |
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Nov 18, 2011 - 9:16 PM
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 Enthusiast Joined Oct 29, '11 From Haltom City, Texas Currently Offline Reputation: 1 (100%) |
pull all four spark plugs(keep them in order) and closely compare the colors to see if one is rich or lean. Also try a cylinder balance test. With the engine running use a rag to pull the spark plug wires one at a time, the rpms should drop and the engine will run rough. If one cylinder has less of an effect on the idle speed when you pull the plug wire than that is your weak cylinder.
A compression check wouldnt be a bad idea either, they have a loaner one at autozone |
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