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Old 05-28-2008, 09:22 PM   #1
Javi_LGT
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2000 LGT r.i.p. WRX

Default HELP !! irratic idle problem ???

ok i have a 02 ej20 swapped lgt and recently my motor has been having a rough idle . everytime i start up as the car is idling the rpms kinda fluctuate between 700- 1200 rpms . recently i changed my spark plugs to ngk iridiums and erased a CEL for my 02 sensors thats about it . can anybody possibly knw wats wrong
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Old 05-29-2008, 12:03 AM   #2
rexman2002
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...........

Last edited by rexman2002; 05-29-2008 at 12:08 AM.
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Old 05-29-2008, 12:16 AM   #3
Phil04
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Do you have a BOV or could there be a vacum leak?
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Old 05-29-2008, 11:42 AM   #4
frdawg
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try cleaning the iac valve,, a dirty one will cause crappy idle, also if you have a bad front o2 sensor, that could cause it too,, did you get the cel for o2 sensor heater? that usually indicates its toast
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Old 05-29-2008, 02:45 PM   #5
ProdriveDreams
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Quote:
Originally Posted by frdawg View Post
try cleaning the iac valve,, a dirty one will cause crappy idle, also if you have a bad front o2 sensor, that could cause it too,, did you get the cel for o2 sensor heater? that usually indicates its toast
the car does not take readings from the front 02 when its still cold, so i doubt this is the issue if it happebns at cold idle
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Old 05-29-2008, 03:19 PM   #6
white2002rs
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maybe if you give me your fmic , it will fix the problem....j/k.......... check for vacum leaks , make sure you dont have any more codes
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Old 05-29-2008, 06:58 PM   #7
03Bugeye
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Quote:
Originally Posted by ProdriveDreams View Post
the car does not take readings from the front 02 when its still cold, so i doubt this is the issue if it happebns at cold idle

duh, its called open loop.
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Old 05-29-2008, 10:45 PM   #8
BluScubi
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Dirty MAF? Throttle position sensor going out? You could have either one but not have a code for it. Some times a dirty throttle plate can screw up your idle too. Does the idle even out once the car warms up?
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