how to adjust idle - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Nismos14 · 02-22-2002, 11:49 AM

i cant seem to figure out how to adjust the idle .... i put in new spark plug wires the car idles a bit too low about 500 rpms.. and it shakes a bit.. how can i adjust the idle speed?

*ca18guy* · 02-22-2002, 11:51 AM

Look on the throttle body, there should be a screw, play with the screw til you get what you want.

*Jeff240sx* · 02-22-2002, 12:00 PM

Is it me, or don't most 240's idle low, like ~500-700 rpms?
-Jeff

Nismos14 · 02-22-2002, 12:27 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from ca18guy on 1:51 pm on Feb. 22, 2002
Look on the throttle body, there should be a screw, play with the screw til you get what you want.
</td></tr></table><span id='postcolor'>

no screw.... i think on the s-14's it different

groundzero · 02-22-2002, 01:43 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Nismos14 on 11:49 am on Feb. 22, 2002
i cant seem to figure out how to adjust the idle .... i put in new spark plug wires the car idles a bit too low about 500 rpms.. and it shakes a bit.. how can i adjust the idle speed?
</td></tr></table><span id='postcolor'>

I have the same problem.  My idle goes under 1000 rpm.  I don't know whether it should be 1000 or less, but my car shakes as well like my car is about to die or something.  Honestly if I had an answer for this problem I would definitely help you, but I dont I'm figuring out what it is too.  And I only have 127k miles, that's not alot.

Nismos14 · 02-22-2002, 01:53 PM

lol i haev 66000 miles but hey i dunno.... i guess this is a common problem my idle just kept getting lower and lower... first with the intake then removing the resonator then the plug's then the plug wires

*transient* · 02-22-2002, 05:24 PM

750 is about perfect idle for a 240. If it's cold, you may notice it revvign a bit higher to help warm up.

Kid Zelda · 02-22-2002, 05:27 PM

Cant you also adjust the idle via ECU .... even a little ?
I forgot.

(Edited by Kid Zelda at 5:27 pm on Feb. 22, 2002)

*ca18guy* · 02-22-2002, 05:34 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Kid Zelda on 5:27 pm on Feb. 22, 2002
Cant you also adjust the idle via ECU .... even a little ?
I forgot.

</td></tr></table><span id='postcolor'>

Yeah you can hook your lap top into the USB slot on the side of the ECU to get full control over it and even be able to map it for nawwwwsss.  Actually I have never heard of adjusting anything with the stock ecu, I don't think you can.

Kid Zelda · 02-22-2002, 05:42 PM

I'm not talking about a major adjustment ....  very very very minor .... oh well ... I don't care

S13Grl · 02-22-2002, 06:54 PM

The proper idle speed for KA24DEs should be between 700-1000 RPMs. According to the tech books, of course.

Tuck&Poke · 02-22-2002, 07:10 PM

geez s13grl  your like a friggin 240 encyclopedia.

S13Grl · 02-22-2002, 07:18 PM

Haha! Now that's pretty funny! <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

Nismos14 · 02-23-2002, 03:36 PM

so how do i do it on an s-14<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>???

camppain · 02-23-2002, 06:01 PM

if the 95 and up 240 dohc is like the altima engine there should be a screw for adjustment near the (thinks) i know its not by the tb........*thinkin* it should be by cyl #1 on the intake port.

if not it should be on your tb

you would also need to warm up the car for 2 mins get it to operating temp. disconnect your tb sensor and adjust the screw and check

it should tell you your rpm range under your hood

then plug everything back in and enjoy

camppain · 02-23-2002, 06:03 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from S13Grl on 6:54 pm on Feb. 22, 2002
The proper idle speed for KA24DEs should be between 700-1000 RPMs. According to the tech books, of course.

</td></tr></table><span id='postcolor'>

i think that your wrong irena all the nissans ive seen give a +/- of either 50 or 100 but i wanna say 50

i doubt it varies +/- 300 that is just to much.

Kid Zelda · 02-23-2002, 06:34 PM

1. Start car
2. Pop the hood
3. Open the hood.
4. Disconnect the TPS harness
5. Adjust the screw on the IAA.....
6. By adjust the IAA get the car to idel at 650rpm.
7. Reconnect the TPS, car should go to 700 rpm

BTW, its 50 +/- rpms ....

not 700-1000.

camppain · 02-24-2002, 06:21 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Kid Zelda on 6:34 pm on Feb. 23, 2002

BTW, its 50 +/- rpms ....

not 700-1000.
</td></tr></table><span id='postcolor'>

<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'> i knew i was right just didnt wanna gloat *covers crotch from irenas slavic suicide ball breaker*

j/p

Nismos14 · 02-24-2002, 11:05 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Kid Zelda on 8:34 pm on Feb. 23, 2002
1. Start car
2. Pop the hood
3. Open the hood.
4. Disconnect the TPS harness
5. Adjust the screw on the IAA.....
6. By adjust the IAA get the car to idel at 650rpm.
7. Reconnect the TPS, car should go to 700 rpm

BTW, its 50 +/- rpms ....

not 700-1000.

</td></tr></table><span id='postcolor'>

how do i do step 4?

camppain · 02-24-2002, 05:03 PM

its a connector by your tb nismo. just push the tabs in and unplug the connector.

96SEChick · 02-24-2002, 05:19 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from camppain on 7<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wow.gif" border="0" valign="absmiddle" alt=':0'>3 pm on Feb. 23, 2002
</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from S13Grl on 6:54 pm on Feb. 22, 2002
The proper idle speed for KA24DEs should be between 700-1000 RPMs. According to the tech books, of course.

</td></tr></table><span id='postcolor'>

i think that your wrong irena all the nissans ive seen give a +/- of either 50 or 100 but i wanna say 50

i doubt it varies +/- 300 that is just to much.

</td></tr></table><span id='postcolor'>

When I first start my car, it's about 1100, when it warms up, it's abut 600.  In the cold, it stays anywhere from 800-1000 on idle.  Does that mean my car is messed up?  Or does it just have normal PMS mood swings like a woman?

*LanceS13* · 02-24-2002, 05:31 PM

That's pretty normal Lauren...the fluctuation with temperature. But your warm idle speed is about 100rpm low, but no biggie...that's about where mine idles, with warm-up at about 1100 as well.

(Edited by LanceS13 at 6:32 pm on Feb. 24, 2002)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

02-22-2002, 11:49 AM	#1
Nismos14 Zilvia FREAK! Join Date: Jun 2001 Location: New Jersey Age: 40 Posts: 1,213 Trader Rating: (0) Feedback Score: 0 reviews	i cant seem to figure out how to adjust the idle .... i put in new spark plug wires the car idles a bit too low about 500 rpms.. and it shakes a bit.. how can i adjust the idle speed?

02-22-2002, 11:51 AM	#2
ca18guy Premium Member Join Date: Jul 2001 Location: Clearwater FL Age: 39 Posts: 3,226 Trader Rating: (0) Rides Gallery: ca18guy Feedback Score: 0 reviews	Look on the throttle body, there should be a screw, play with the screw til you get what you want.

02-22-2002, 12:00 PM	#3
Jeff240sx I hate you too... Join Date: Jul 2001 Location: Tampa, FL Age: 38 Posts: 5,828 Trader Rating: (0) Rides Gallery: Jeff240sx Feedback Score: 0 reviews	Is it me, or don't most 240's idle low, like ~500-700 rpms? -Jeff

02-22-2002, 12:27 PM	#4
Nismos14 Zilvia FREAK! Join Date: Jun 2001 Location: New Jersey Age: 40 Posts: 1,213 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from ca18guy on 1:51 pm on Feb. 22, 2002 Look on the throttle body, there should be a screw, play with the screw til you get what you want. </td></tr></table><span id='postcolor'> no screw.... i think on the s-14's it different

02-22-2002, 01:43 PM	#5
groundzero Zilvia Junkie Join Date: Sep 2001 Posts: 310 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Nismos14 on 11:49 am on Feb. 22, 2002 i cant seem to figure out how to adjust the idle .... i put in new spark plug wires the car idles a bit too low about 500 rpms.. and it shakes a bit.. how can i adjust the idle speed? </td></tr></table><span id='postcolor'> I have the same problem.  My idle goes under 1000 rpm.  I don't know whether it should be 1000 or less, but my car shakes as well like my car is about to die or something.  Honestly if I had an answer for this problem I would definitely help you, but I dont I'm figuring out what it is too.  And I only have 127k miles, that's not alot.

02-22-2002, 01:53 PM	#6
Nismos14 Zilvia FREAK! Join Date: Jun 2001 Location: New Jersey Age: 40 Posts: 1,213 Trader Rating: (0) Feedback Score: 0 reviews	lol i haev 66000 miles but hey i dunno.... i guess this is a common problem my idle just kept getting lower and lower... first with the intake then removing the resonator then the plug's then the plug wires

02-22-2002, 05:24 PM	#7
transient Premium Member Join Date: Jun 2001 Location: Los Angeles, California Age: 37 Posts: 2,947 Trader Rating: (0) Feedback Score: 0 reviews	750 is about perfect idle for a 240. If it's cold, you may notice it revvign a bit higher to help warm up.

02-22-2002, 05:27 PM	#8
Kid Zelda BANNED Join Date: Oct 2001 Posts: 2,347 Trader Rating: (0) Feedback Score: 0 reviews	Cant you also adjust the idle via ECU .... even a little ? I forgot. (Edited by Kid Zelda at 5:27 pm on Feb. 22, 2002)

02-22-2002, 05:34 PM	#9
ca18guy Premium Member Join Date: Jul 2001 Location: Clearwater FL Age: 39 Posts: 3,226 Trader Rating: (0) Rides Gallery: ca18guy Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Kid Zelda on 5:27 pm on Feb. 22, 2002 Cant you also adjust the idle via ECU .... even a little ? I forgot. </td></tr></table><span id='postcolor'> Yeah you can hook your lap top into the USB slot on the side of the ECU to get full control over it and even be able to map it for nawwwwsss.  Actually I have never heard of adjusting anything with the stock ecu, I don't think you can.

02-22-2002, 05:42 PM	#10
Kid Zelda BANNED Join Date: Oct 2001 Posts: 2,347 Trader Rating: (0) Feedback Score: 0 reviews	I'm not talking about a major adjustment ....  very very very minor .... oh well ... I don't care

02-22-2002, 06:54 PM	#11
S13Grl Married to the Mob Join Date: Dec 2000 Age: 40 Posts: 3,670 Trader Rating: (0) Feedback Score: 0 reviews	The proper idle speed for KA24DEs should be between 700-1000 RPMs. According to the tech books, of course.

02-22-2002, 07:10 PM	#12
Tuck&Poke Zilvia FREAK! Join Date: Aug 2001 Location: MIA Age: 35 Posts: 1,046 Trader Rating: (0) Feedback Score: 0 reviews	geez s13grl  your like a friggin 240 encyclopedia.

02-22-2002, 07:18 PM	#13
S13Grl Married to the Mob Join Date: Dec 2000 Age: 40 Posts: 3,670 Trader Rating: (0) Feedback Score: 0 reviews	Haha! Now that's pretty funny! <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

02-23-2002, 03:36 PM	#14
Nismos14 Zilvia FREAK! Join Date: Jun 2001 Location: New Jersey Age: 40 Posts: 1,213 Trader Rating: (0) Feedback Score: 0 reviews	so how do i do it on an s-14<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>???

02-23-2002, 06:01 PM	#15
camppain Will never get banned... Join Date: Sep 2001 Location: San Diego CA Age: 41 Posts: 1,510 Trader Rating: (0) Feedback Score: 0 reviews	if the 95 and up 240 dohc is like the altima engine there should be a screw for adjustment near the (thinks) i know its not by the tb........thinkin it should be by cyl #1 on the intake port. if not it should be on your tb you would also need to warm up the car for 2 mins get it to operating temp. disconnect your tb sensor and adjust the screw and check it should tell you your rpm range under your hood then plug everything back in and enjoy

02-23-2002, 06:03 PM	#16
camppain Will never get banned... Join Date: Sep 2001 Location: San Diego CA Age: 41 Posts: 1,510 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from S13Grl on 6:54 pm on Feb. 22, 2002 The proper idle speed for KA24DEs should be between 700-1000 RPMs. According to the tech books, of course. </td></tr></table><span id='postcolor'> i think that your wrong irena all the nissans ive seen give a +/- of either 50 or 100 but i wanna say 50 i doubt it varies +/- 300 that is just to much.

02-23-2002, 06:34 PM	#17
Kid Zelda BANNED Join Date: Oct 2001 Posts: 2,347 Trader Rating: (0) Feedback Score: 0 reviews	1. Start car 2. Pop the hood 3. Open the hood. 4. Disconnect the TPS harness 5. Adjust the screw on the IAA..... 6. By adjust the IAA get the car to idel at 650rpm. 7. Reconnect the TPS, car should go to 700 rpm BTW, its 50 +/- rpms .... not 700-1000.

02-24-2002, 06:21 AM	#18
camppain Will never get banned... Join Date: Sep 2001 Location: San Diego CA Age: 41 Posts: 1,510 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Kid Zelda on 6:34 pm on Feb. 23, 2002 BTW, its 50 +/- rpms .... not 700-1000. </td></tr></table><span id='postcolor'> <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'> i knew i was right just didnt wanna gloat covers crotch from irenas slavic suicide ball breaker j/p

02-24-2002, 11:05 AM	#19
Nismos14 Zilvia FREAK! Join Date: Jun 2001 Location: New Jersey Age: 40 Posts: 1,213 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Kid Zelda on 8:34 pm on Feb. 23, 2002 1. Start car 2. Pop the hood 3. Open the hood. 4. Disconnect the TPS harness 5. Adjust the screw on the IAA..... 6. By adjust the IAA get the car to idel at 650rpm. 7. Reconnect the TPS, car should go to 700 rpm BTW, its 50 +/- rpms .... not 700-1000. </td></tr></table><span id='postcolor'> how do i do step 4?

02-24-2002, 05:03 PM	#20
camppain Will never get banned... Join Date: Sep 2001 Location: San Diego CA Age: 41 Posts: 1,510 Trader Rating: (0) Feedback Score: 0 reviews	its a connector by your tb nismo. just push the tabs in and unplug the connector.

02-24-2002, 05:19 PM	#21
96SEChick Nissanaholic! Join Date: Jun 2001 Location: Broken Arrow, OK Age: 44 Posts: 1,814 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from camppain on 7<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wow.gif" border="0" valign="absmiddle" alt=':0'>3 pm on Feb. 23, 2002 </span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from S13Grl on 6:54 pm on Feb. 22, 2002 The proper idle speed for KA24DEs should be between 700-1000 RPMs. According to the tech books, of course. </td></tr></table><span id='postcolor'> i think that your wrong irena all the nissans ive seen give a +/- of either 50 or 100 but i wanna say 50 i doubt it varies +/- 300 that is just to much. </td></tr></table><span id='postcolor'> When I first start my car, it's about 1100, when it warms up, it's abut 600.  In the cold, it stays anywhere from 800-1000 on idle.  Does that mean my car is messed up?  Or does it just have normal PMS mood swings like a woman?

02-24-2002, 05:31 PM	#22
LanceS13 AutoX Junkie Join Date: Jun 2001 Location: MS Age: 39 Posts: 2,044 Trader Rating: (0) Feedback Score: 0 reviews	That's pretty normal Lauren...the fluctuation with temperature. But your warm idle speed is about 100rpm low, but no biggie...that's about where mine idles, with warm-up at about 1100 as well. (Edited by LanceS13 at 6:32 pm on Feb. 24, 2002)