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 1991-1994 240sx: Setting adjusting idle tutorial
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vancouverbc
Tutorial Man

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3071 posts
1991 240sx
langley
10-30-2003

  1991-1994 240sx: Setting adjusting idle tutorial



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Idle specs:-Idle speed (in "N" position, No-Load) 700 +/- 50 rpm
-Idle speed (In "N" position, Air Conditioning ON) 1000 +/- rpm

Tools:

Flat head screwdriver
Flashlight

Adjusting the idle

Setting idle while engine is on. Disconnect the TPS. Turn engine on and adjust idle screw. Your idle will be 50 rpm lower with TPS disconnected so shoot for 650 rpm to get 700 rpm. Make sure engine is warmed up and your base timing is at spec.

Turn the idle adjusting screw on the IAA clockwise to lower idle or counter clockwise to increase idle. The IAA is at the back of the intake manifold by the firewall passenger side. You can see it standing over the passenger side wheel . Use a flashlight. Your beloved should purr at 700 or so rpm. (The Factory manual gives a +/- tolerance of 50 rpm.)


Location of idle adjusting screw


Location of throttle position sensor plug(smaller than the other plug in pic)




Advanced Discussion

How to adjust throttle plate: (dont do this except if someone else has played with it)

Modified by vancouverbc at 7:37 PM 12/24/2009


Modified by vancouverbc at 7:42 PM 12/24/2009

Modified by vancouverbc at 7:43 PM 12/24/2009



1989-1998 240sx TUTORIALS
Factory service manuals 3
Factory service manuals BEST
Factory service manual2
Factory service manual 1989
Old FAQ
INSTALLS
Pictures of parts


thoughtless



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37 posts
1997 silvermoss 240sx SE
clarksville tn
4-1-2009

 « Re: 1991-1994 240sx: Setting adjusting idle tutorial (vancouverbc)


thanks a ton
johnny5



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177 posts
91 red 240 hatch
bordentown nj
3-1-2009

 « Re: 1991-1994 240sx: Setting adjusting idle tutorial (thoughtless)


to bad its hard as hell to get to if you have anti lock brakes lol i need to do this so bad and i cant get to it lol



Quote, originally posted by amakadius »
try being black

Quote, originally posted by 480sx »
Camshafts connected to tha... Timing chain! Timing chains connected to the.. Idler sprocket! Idler Sprockets connected to the.. Lower timing chain! Lower timing chains connected to the.. Crank shaft!

 

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