KA24DE Idle Issue Please Help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

JDMBart · 02-23-2014, 03:33 PM

Need some help with my idle. It idles at a steady 1000 rpm but when i apply gas it no longer stays constant and fluctuates around 2k rpms. I have already made adjustments with the idle screw. Any help is appreciated.

Heres the youtube video:

http://www.youtube.com/watch?v=c0SeJ...ature=youtu.be

JDMBart · 02-24-2014, 05:03 PM

anyone know where to start?

Driftwire · 02-25-2014, 06:38 AM

TPS sensor probably.

90S13hatch_tony · 02-25-2014, 07:53 AM

The idle screw should have been the last thing you check, could of been that the iacv settings were good but now thrown off, check for a possible vaccum leak around the intake manifold, fuel rail, bad injector o-rings, brake booster line...etc

JDMBart · 03-06-2014, 10:24 PM

update: ive changed my spark plugs and o2 sensor, cleaned the maf and cleaned the throttle body. I have also fixed two vaccum leaks. My idle is still high after letting off the throttle

s13Cory · 03-07-2014, 06:06 AM

You're saying it idles good, then once you apply gas it starts to bounce to 2k and down? If that's so, then see how your coolant level is. Might need to add some. My friends teg did the same thing and we had to add a lot more coolant and it was good after. I don't know if it'll be the same reason, but something you can check.

JDMBart · 03-07-2014, 06:37 AM

Yep, coolant level is full. Both the radiator and reservoir were topped off. However maybe it could be a coolant sensor?

Sent from my SPH-L720 using Tapatalk

JDMBart · 03-11-2014, 12:49 PM

Update: cleaned my iacv today and it helped a little bit but still seems to idle high

supasan · 03-12-2014, 01:28 PM

Sounds like mine. It would idle around 2k then drop down to roughly 1200-1500 for a couple secs then go back up. Found out I had a big exhaust leak where the egr pipe is connected to the exhaust manifold before the o2. not sure if i fixed it or not cause i had to redo my lower timing chain. I'll let you know when its fired up. hopefully this weekend if the weather permits.

JDMBart · 03-12-2014, 01:59 PM

Quote:

Originally Posted by supasan

Sounds like mine. It would idle around 2k then drop down to roughly 1200-1500 for a couple secs then go back up. Found out I had a big exhaust leak where the egr pipe is connected to the exhaust manifold before the o2. not sure if i fixed it or not cause i had to redo my lower timing chain. I'll let you know when its fired up. hopefully this weekend if the weather permits.

okay sounds good, i actually deleted my egr valve so i scewed a plug into the exhaust manifold and bought an isis block off plate for the intake manifold. I am putting on a new tps sensor and throttle body gasket tomorrow. I will keep this thread updated

munkyshet · 03-13-2014, 10:32 PM

Did you know that the EGR valve is off at idle and WOT? So that delete plate does nothing for you. It's vacuum controlled so as soon as you hit the gas, it shuts off and you are running full on. It only turns on at cruising speeds and light accelerations. This saves your gas and reduces NOx emissions, as well as it saves your cats efficiency in the long haul. IMO, and TLDR, bring the EGR back into play.

Sent from my SCH-I535 using Tapatalk

Trap Star · 03-13-2014, 11:40 PM

When I deleted my EGR I had similar issues. There is a valve/solenoid, I don't know the official name, that I deleted on accident as well. It has 3 vacuum lines running from it, probably a part of whats used to control the egr (there is a small plug on it as well). Without it the car was having a bit of trouble with stalling at traffic lights or stop signs and while driving I would have momentary loss of power that would get slightly worse if you pressed the gas before suddenly regaining power. So if you accidentally disposed of that it could be you're issue.

JDMBart · 03-13-2014, 11:54 PM

[QUOTE=Trap Star;5583159]When I deleted my EGR I had similar issues. There is a valve/solenoid, I don't know the official name, that I deleted on accident as well. It has 3 vacuum lines running from it, probably a part of whats used to control the egr (there is a small plug on it as well). Without it the car was having a bit of trouble with stalling at traffic lights or stop signs and while driving I would have momentary loss of power that would get slightly worse if you pressed the gas before suddenly regaining power. So if you accidentally disposed of that it could be you're issue.[/QUOTE

I only deleted the main solenoid that gets blocked off by the egr plate. It had one vaccum line coming out of it but i Blocked that vaccum line off. I ran a vaccum test yesterday and tested 17 hpa which is normal.

Trap Star · 03-17-2014, 01:00 PM

Check through this "how to", probably one of the most detailed ones I've seen in terms of pictures and description of what to do. I don't think you are supposed to block the line, I'm pretty sure it needs to be rerouted to work properly. I ended up not having to block any lines after I re-installed that valve I mentioned before.

http://tech.240sxone.com/115/ka24de-egr-removal/

02-23-2014, 03:33 PM	#1
JDMBart Banned from the Marketplace Join Date: Aug 2013 Location: Chicago Posts: 340 Trader Rating: (-1) Feedback Score: -1 reviews	KA24DE Idle Issue Please Help Need some help with my idle. It idles at a steady 1000 rpm but when i apply gas it no longer stays constant and fluctuates around 2k rpms. I have already made adjustments with the idle screw. Any help is appreciated. Heres the youtube video: http://www.youtube.com/watch?v=c0SeJ...ature=youtu.be

03-13-2014, 10:32 PM	#11
munkyshet Join Date: Mar 2014 Location: Winter Haven, FL Age: 26 Posts: 40 Trader Rating: (0) Feedback Score: 0 reviews	Did you know that the EGR valve is off at idle and WOT? So that delete plate does nothing for you. It's vacuum controlled so as soon as you hit the gas, it shuts off and you are running full on. It only turns on at cruising speeds and light accelerations. This saves your gas and reduces NOx emissions, as well as it saves your cats efficiency in the long haul. IMO, and TLDR, bring the EGR back into play. Sent from my SCH-I535 using Tapatalk __________________ 1992 240SX Vert Stock KA R.I.P. 1993 240SX Hatch Fresh KA

03-13-2014, 11:40 PM	#12
Trap Star Zilvia Junkie Join Date: Jan 2008 Location: ATL/Sylva, NC Age: 33 Posts: 409 Trader Rating: (0) Feedback Score: 0 reviews	When I deleted my EGR I had similar issues. There is a valve/solenoid, I don't know the official name, that I deleted on accident as well. It has 3 vacuum lines running from it, probably a part of whats used to control the egr (there is a small plug on it as well). Without it the car was having a bit of trouble with stalling at traffic lights or stop signs and while driving I would have momentary loss of power that would get slightly worse if you pressed the gas before suddenly regaining power. So if you accidentally disposed of that it could be you're issue. __________________ 86 300zx/90 240sx/97 240sx/96 LS400/03 350z -Shake N' Break Racing-

03-17-2014, 01:00 PM	#14
Trap Star Zilvia Junkie Join Date: Jan 2008 Location: ATL/Sylva, NC Age: 33 Posts: 409 Trader Rating: (0) Feedback Score: 0 reviews	Check through this "how to", probably one of the most detailed ones I've seen in terms of pictures and description of what to do. I don't think you are supposed to block the line, I'm pretty sure it needs to be rerouted to work properly. I ended up not having to block any lines after I re-installed that valve I mentioned before. http://tech.240sxone.com/115/ka24de-egr-removal/ __________________ 86 300zx/90 240sx/97 240sx/96 LS400/03 350z -Shake N' Break Racing-

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02-24-2014, 05:03 PM	#2
JDMBart Banned from the Marketplace Join Date: Aug 2013 Location: Chicago Posts: 340 Trader Rating: (-1) Feedback Score: -1 reviews	anyone know where to start?

02-25-2014, 07:53 AM	#4
90S13hatch_tony Zilvia Addict Join Date: Jul 2011 Location: North Pomona, CA Age: 29 Posts: 781 Trader Rating: (24) Feedback Score: 24 reviews	The idle screw should have been the last thing you check, could of been that the iacv settings were good but now thrown off, check for a possible vaccum leak around the intake manifold, fuel rail, bad injector o-rings, brake booster line...etc

03-06-2014, 10:24 PM	#5
JDMBart Banned from the Marketplace Join Date: Aug 2013 Location: Chicago Posts: 340 Trader Rating: (-1) Feedback Score: -1 reviews	update: ive changed my spark plugs and o2 sensor, cleaned the maf and cleaned the throttle body. I have also fixed two vaccum leaks. My idle is still high after letting off the throttle

03-07-2014, 06:06 AM	#6
s13Cory Leaky Injector Join Date: Mar 2014 Location: North Carolina Posts: 84 Trader Rating: (0) Feedback Score: 0 reviews	You're saying it idles good, then once you apply gas it starts to bounce to 2k and down? If that's so, then see how your coolant level is. Might need to add some. My friends teg did the same thing and we had to add a lot more coolant and it was good after. I don't know if it'll be the same reason, but something you can check.

03-07-2014, 06:37 AM	#7
JDMBart Banned from the Marketplace Join Date: Aug 2013 Location: Chicago Posts: 340 Trader Rating: (-1) Feedback Score: -1 reviews	Yep, coolant level is full. Both the radiator and reservoir were topped off. However maybe it could be a coolant sensor? Sent from my SPH-L720 using Tapatalk

03-11-2014, 12:49 PM	#8
JDMBart Banned from the Marketplace Join Date: Aug 2013 Location: Chicago Posts: 340 Trader Rating: (-1) Feedback Score: -1 reviews	Update: cleaned my iacv today and it helped a little bit but still seems to idle high

03-12-2014, 01:28 PM	#9
supasan Leaky Injector Join Date: Feb 2013 Location: sacramento Ca Age: 29 Posts: 78 Trader Rating: (0) Feedback Score: 0 reviews	Sounds like mine. It would idle around 2k then drop down to roughly 1200-1500 for a couple secs then go back up. Found out I had a big exhaust leak where the egr pipe is connected to the exhaust manifold before the o2. not sure if i fixed it or not cause i had to redo my lower timing chain. I'll let you know when its fired up. hopefully this weekend if the weather permits.

03-13-2014, 11:54 PM	#13
JDMBart Banned from the Marketplace Join Date: Aug 2013 Location: Chicago Posts: 340 Trader Rating: (-1) Feedback Score: -1 reviews	[QUOTE=Trap Star;5583159]When I deleted my EGR I had similar issues. There is a valve/solenoid, I don't know the official name, that I deleted on accident as well. It has 3 vacuum lines running from it, probably a part of whats used to control the egr (there is a small plug on it as well). Without it the car was having a bit of trouble with stalling at traffic lights or stop signs and while driving I would have momentary loss of power that would get slightly worse if you pressed the gas before suddenly regaining power. So if you accidentally disposed of that it could be you're issue.[/QUOTE I only deleted the main solenoid that gets blocked off by the egr plate. It had one vaccum line coming out of it but i Blocked that vaccum line off. I ran a vaccum test yesterday and tested 17 hpa which is normal.