ka24det idle problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

4drsleeper · 05-17-2012, 07:52 PM

i just finished my ka24det project, finally boosted it =) it starts right up and idles about 900rpms, but when ever i press the gas pedal it revs up and then the idle just shoot all the way down where it feels like it wants to die, i put a video so you guys could kind of get an idea whatit does. if anyone could help i would greatly appreciate it.

my set up is t28 BB
sard 550cc injectors
z32 maf
isis FMIC kit
walbro 255 fuel pump
ngk 7 heat range plugs
enthalpy base tune for set up above.
also my wastegate, BOV and boost gauge vacuum all hooked up to FPR vacuum line.

http://s69.photobucket.com/albums/i5...er_media_share

Bentleyness · 05-18-2012, 12:36 AM

invest in a wideband. i kno it help me with alot of confusions, i read alot of mail order tunes like urs and jwt are tuned rich, u might be flooding when coming down from rpms. just a thought.

4drsleeper · 05-18-2012, 07:10 AM

I have a wideband I just haven't had the chance to install i yet but I will soon as I get home.. I just wanted to see if I did anything wrong with the turbo install like my vacuum lines, and also I have a line not connect to vacuum under the throttle body that I think it goes to my egr or evap system

JDMRIDDAZ · 05-18-2012, 07:23 AM

check and clean iacv...
and it maybe tune related...
i got a ka20det w no tune
at first it didnt idle right and would die after a rev too
it was a loose clamp on iacv...
hook up ur wieband
and do u have an adj..fpr

4drsleeper · 05-18-2012, 09:14 AM

I didn't really mess around with iacv thou, the only ones I really touched where the coolant lines under the throttle body and the fpr vacuum line. n no I don't have a abjustable FPR

4drsleeper · 05-20-2012, 03:25 PM

so here another video with wideband and boost gauge installed, you guys could see mu
problem with the idle.

http://s69.photobucket.com/albums/i5...er_media_share

waxball88 · 05-20-2012, 03:27 PM

Your BOV is not recirculated?

4drsleeper · 05-20-2012, 03:49 PM

no its not, i took off the BOV and plugged the flange with my hand and had a friend rev the car and it was still doing the same problem.... all of my friends are saying my tune is not good

4drsleeper · 06-01-2012, 10:21 PM

so i finally got my downpipe welded, wideband installed and also the afc neo installed n tuned, but im still having the decel problem. if i mess with the decel setting on the neo its fixes the problem, but on a cold start its still idles like shit unless i raise the decel to 0.08% until it gets normal then i would lower it back down to 0.06%. SO from all of this i have came to a conclusion that my problem is that my DECEL setting on the ecu are all out of wack....

05-17-2012, 07:52 PM	#1
4drsleeper Zilvia Member Join Date: May 2010 Location: hollywood, florida Age: 33 Posts: 158 Trader Rating: (2) Feedback Score: 2 reviews	ka24det idle problem "UPDATE" i just finished my ka24det project, finally boosted it =) it starts right up and idles about 900rpms, but when ever i press the gas pedal it revs up and then the idle just shoot all the way down where it feels like it wants to die, i put a video so you guys could kind of get an idea whatit does. if anyone could help i would greatly appreciate it. my set up is t28 BB sard 550cc injectors z32 maf isis FMIC kit walbro 255 fuel pump ngk 7 heat range plugs enthalpy base tune for set up above. also my wastegate, BOV and boost gauge vacuum all hooked up to FPR vacuum line. http://s69.photobucket.com/albums/i5...er_media_share Last edited by 4drsleeper; 06-01-2012 at 10:16 PM..

05-18-2012, 07:23 AM	#4
JDMRIDDAZ Zilvia Junkie Join Date: Sep 2007 Location: ｆォリダ Age: 44 Posts: 440 Trader Rating: (3) Feedback Score: 3 reviews	check and clean iacv... and it maybe tune related... i got a ka20det w no tune at first it didnt idle right and would die after a rev too it was a loose clamp on iacv... hook up ur wieband and do u have an adj..fpr __________________ シチサｎ w/ka20det:in progress シチサｎw/sr20det:stolen

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05-18-2012, 12:36 AM	#2
Bentleyness Leaky Injector Join Date: Mar 2012 Location: chicago area Age: 33 Posts: 140 Trader Rating: (0) Feedback Score: 0 reviews	invest in a wideband. i kno it help me with alot of confusions, i read alot of mail order tunes like urs and jwt are tuned rich, u might be flooding when coming down from rpms. just a thought.

05-18-2012, 07:10 AM	#3
4drsleeper Zilvia Member Join Date: May 2010 Location: hollywood, florida Age: 33 Posts: 158 Trader Rating: (2) Feedback Score: 2 reviews	I have a wideband I just haven't had the chance to install i yet but I will soon as I get home.. I just wanted to see if I did anything wrong with the turbo install like my vacuum lines, and also I have a line not connect to vacuum under the throttle body that I think it goes to my egr or evap system

05-18-2012, 09:14 AM	#5
4drsleeper Zilvia Member Join Date: May 2010 Location: hollywood, florida Age: 33 Posts: 158 Trader Rating: (2) Feedback Score: 2 reviews	I didn't really mess around with iacv thou, the only ones I really touched where the coolant lines under the throttle body and the fpr vacuum line. n no I don't have a abjustable FPR

05-20-2012, 03:25 PM	#6
4drsleeper Zilvia Member Join Date: May 2010 Location: hollywood, florida Age: 33 Posts: 158 Trader Rating: (2) Feedback Score: 2 reviews	so here another video with wideband and boost gauge installed, you guys could see mu problem with the idle. http://s69.photobucket.com/albums/i5...er_media_share

05-20-2012, 03:27 PM	#7
waxball88 Zilvia FREAK! Join Date: Jun 2009 Location: Gainesville Posts: 1,061 Trader Rating: (9) Feedback Score: 9 reviews	Your BOV is not recirculated?

05-20-2012, 03:49 PM	#8
4drsleeper Zilvia Member Join Date: May 2010 Location: hollywood, florida Age: 33 Posts: 158 Trader Rating: (2) Feedback Score: 2 reviews	no its not, i took off the BOV and plugged the flange with my hand and had a friend rev the car and it was still doing the same problem.... all of my friends are saying my tune is not good

06-01-2012, 10:21 PM	#9
4drsleeper Zilvia Member Join Date: May 2010 Location: hollywood, florida Age: 33 Posts: 158 Trader Rating: (2) Feedback Score: 2 reviews	so i finally got my downpipe welded, wideband installed and also the afc neo installed n tuned, but im still having the decel problem. if i mess with the decel setting on the neo its fixes the problem, but on a cold start its still idles like shit unless i raise the decel to 0.08% until it gets normal then i would lower it back down to 0.06%. SO from all of this i have came to a conclusion that my problem is that my DECEL setting on the ecu are all out of wack....