HOW TO: Adjust your idle - SR20 Forum
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Old 06-21-2004, 05:43 PM   #1 (permalink)
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HOW TO: Adjust your idle

Start car and let idle until engine is warm.
Hold throttle at 2000 RPM for two minutes.
Turn off engine and disconnect throttle sensor.
Start engine, rev twice to 2000 RPM.
Adjust the idle speed to ~750rp using the idle adjust screw, located near the oil filter.
Shut down the engine, connect the throttle sensor, and start the engine.
The engine should now idle at out 800RPM.

Source: Jim Wright
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Old 09-04-2004, 04:02 AM   #2 (permalink)
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Re: HOW TO: Adjust your idle

Quote:
Originally Posted by sr20boston
Start car and let idle until engine is warm.
Hold throttle at 2000 RPM for two minutes.
Turn off engine and disconnect throttle sensor.
Start engine, rev twice to 2000 RPM.
Adjust the idle speed to ~750rp using the idle adjust screw, located near the oil filter.
Shut down the engine, connect the throttle sensor, and start the engine.
The engine should now idle at out 800RPM.

Source: Jim Wright
I'm a newbie, I just want to know where is the throttle sensor. Thanx.
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Old 09-04-2004, 09:31 PM   #3 (permalink)
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Re: HOW TO: Adjust your idle

its on the right side of the throttle body.
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Old 09-07-2004, 01:26 AM   #4 (permalink)
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Re: HOW TO: Adjust your idle

Ok I got that, Thanx. However, I have adjusted the screw and the RPM wont go below 1000 and whenever it does is acts like it is gonna stall, I had to turn it up back.
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Old 09-07-2004, 02:16 PM   #5 (permalink)
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Re: HOW TO: Adjust your idle

one more note...dont even attempt this unless you have a timing light that will give you an accurate RPM readout. The stock RPM gauge should not be trusted for this.
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Old 09-14-2004, 04:20 PM   #6 (permalink)
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I have a question. I can put my car in timing mode and adjust the idle with the screw, but when I turn the car off and plug in the tps and start the car the idle never changes from where it was. Am I doing something wrong?
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Old 09-14-2004, 05:02 PM   #7 (permalink)
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my car would not go into timing mode and thus I was unable to adjust my idle properly. I had to get a nissan dealer to do it through the consult. But they said clearning any CEL codes before would help.
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Old 09-15-2004, 11:48 PM   #8 (permalink)
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Plug tps back in start car then unplug it again let it idle for a couple of minutes and plug it back in with car runningg. It needs to relearn that way.
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Old 09-16-2004, 04:34 PM   #9 (permalink)
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Quote:
Originally Posted by Low612
Plug tps back in start car then unplug it again let it idle for a couple of minutes and plug it back in with car runningg. It needs to relearn that way.
Thats what I do. My car idles at 750rpm, which is what it should. But I would like for it to be a bit higher since I am running S4's. I can have the car in timing mode and turn the idle up to 900rpm and then when I turn the car off and plug the tps back in and then start the car the idle is still 750. Then I will reset the TPS and that doesn't change the idle either.
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Old 09-16-2004, 11:37 PM   #10 (permalink)
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Are you unplugging the iacv? If not ,unplug the brown connector on it and adjust idle to 1200 with tps unplugged. Then shut car off and plug iacv/tps back start car let it stabilize idle then unplug tps for a minute or two plug back in . I have dones this with s3's to stabilze idle a 1k rpms to reduce lope. Hope it works for you.
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Old 09-17-2004, 03:27 PM   #11 (permalink)
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I will try that. Thanks
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Old 09-18-2004, 01:56 PM   #12 (permalink)
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Quote:
Originally Posted by Yahnozha
one more note...dont even attempt this unless you have a timing light that will give you an accurate RPM readout. The stock RPM gauge should not be trusted for this.
Well my RPM gauge is still reading incorrectly (steady @1000) however my timing was out. I adjusted it to 17 and WOW whata difference. Is like i get more HP. Thanks.
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Old 09-19-2004, 08:09 PM   #13 (permalink)
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Quote:
Originally Posted by Low612
Are you unplugging the iacv? If not ,unplug the brown connector on it and adjust idle to 1200 with tps unplugged. Then shut car off and plug iacv/tps back start car let it stabilize idle then unplug tps for a minute or two plug back in . I have dones this with s3's to stabilze idle a 1k rpms to reduce lope. Hope it works for you.
thanks for the tip I tried unpluging the iavc and it worked. Now she idles at 900rpm
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Old 09-19-2004, 10:03 PM   #14 (permalink)
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no problem glad it worked .
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Old 09-19-2004, 11:58 PM   #15 (permalink)
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the idle screw is by the oil filter? I thought the idle screw was right by the throttle body, if not what screw is that?
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Old 11-09-2004, 07:40 AM   #16 (permalink)
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does adjusting your timing affect your idle RPM ???

changing your timing is different from changing your idle isnt it ?

also what are your revs at ?
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Old 11-16-2004, 06:03 PM   #17 (permalink)
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Quote:
Originally Posted by ehsar20
the idle screw is by the oil filter? I thought the idle screw was right by the throttle body, if not what screw is that?

Anyone? I know where the screw is "supposed" to be on the throttle body but I'm not sure where there is one by the oil filter. I can't seem to find it in the FSM.
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Old 11-17-2004, 12:59 AM   #18 (permalink)
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the screw is on the Idle Control Valve on the plenum of the intake manifold by the oil filter
some have a phillips screw, some have a knob...
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Old 01-11-2005, 09:47 AM   #19 (permalink)
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You just talked about the idle control valve, i just took mine out of my primera due to the solenoid not working does anyone know who makes those solenoids because i am really stuck here please!!
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Old 02-08-2005, 10:49 PM   #20 (permalink)
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I believe this is what the Idle adjust screw is. Makes sense now, I wondered what that was :-)

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