Idle hunting s13 Sr20det - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

dj_cally_17 · 03-25-2016, 07:13 PM

Installed a power fc and dyno tuned with the fc datalogit. i forgot to due the idle learn but luckily i have the dyno maps saved on a memory stick. my issue is after i load the map and begin idle learning procedures the idle starts to hunt at 1000-1500rpm and is not at a steady 900rpm where its set to be. i reinitialized and reupload the maps multiple times. checked coolant, cleaned the maf, checked the iacv, and made sure i had no boost/vacuum leaks. the car was running perfectly fine at the dyno shop when i took it for a test run around the shop. and now im home with this issue. so i dont know what to do now or what it could be. Zilvians help!

attached is a youtube video of whats going on*

https://youtu.be/ugqYkCmnkgg

KAT-PWR · 03-25-2016, 09:06 PM

02 sensor

(Didn'treadmessagelength)

andisan · 03-26-2016, 10:11 AM

Vacuum leak??

Mine did the same thing till I found those small little hoses with cracks :/

dj_cally_17 · 03-26-2016, 05:28 PM

hey guys thanks for the replies.

i double check everything, still same issue. im thinking maybe the gas im using has something to do with it also. tomorrow i will go back to using shell v power instead of bp

dj_cally_17 · 04-01-2016, 06:37 PM

idle hunting is now fixed.
S13 SR20det idle hunt finally fixed. What I did to solve it was to look around the IAVC for the coolant lines and i actually found one of the two that was kinked. With that said no coolant was getting to the IAVC and causing the erratic idle. I hope this will help someone else out in the future.

https://youtu.be/peS2zjOMjx4

03-25-2016, 07:13 PM	#1
dj_cally_17 Join Date: Nov 2013 Location: United States Posts: 17 Trader Rating: (0) Feedback Score: 0 reviews	Idle hunting s13 Sr20det Installed a power fc and dyno tuned with the fc datalogit. i forgot to due the idle learn but luckily i have the dyno maps saved on a memory stick. my issue is after i load the map and begin idle learning procedures the idle starts to hunt at 1000-1500rpm and is not at a steady 900rpm where its set to be. i reinitialized and reupload the maps multiple times. checked coolant, cleaned the maf, checked the iacv, and made sure i had no boost/vacuum leaks. the car was running perfectly fine at the dyno shop when i took it for a test run around the shop. and now im home with this issue. so i dont know what to do now or what it could be. Zilvians help! attached is a youtube video of whats going on* https://youtu.be/ugqYkCmnkgg

03-25-2016, 09:06 PM	#2
KAT-PWR Nissanaholic! Join Date: Dec 2011 Location: US Posts: 2,040 Trader Rating: (11) Rides Gallery: KAT-PWR Feedback Score: 11 reviews	02 sensor (Didn'treadmessagelength) __________________ MRP Manufacturing

03-26-2016, 10:11 AM	#3
andisan Nissanaholic! Join Date: Oct 2007 Location: Lompoc CA 805!!!! Age: 37 Posts: 2,049 Trader Rating: (12) Feedback Score: 12 reviews	Vacuum leak?? Mine did the same thing till I found those small little hoses with cracks :/ __________________

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03-26-2016, 05:28 PM	#4
dj_cally_17 Join Date: Nov 2013 Location: United States Posts: 17 Trader Rating: (0) Feedback Score: 0 reviews	hey guys thanks for the replies. i double check everything, still same issue. im thinking maybe the gas im using has something to do with it also. tomorrow i will go back to using shell v power instead of bp

04-01-2016, 06:37 PM	#5
dj_cally_17 Join Date: Nov 2013 Location: United States Posts: 17 Trader Rating: (0) Feedback Score: 0 reviews	idle hunting is now fixed. S13 SR20det idle hunt finally fixed. What I did to solve it was to look around the IAVC for the coolant lines and i actually found one of the two that was kinked. With that said no coolant was getting to the IAVC and causing the erratic idle. I hope this will help someone else out in the future. https://youtu.be/peS2zjOMjx4