sr20det idle issue - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

bogan · 07-10-2011, 04:02 AM

hay all been having idle issues. i got a video of the issue ive been trying to resolve the issue on other sites but they take to long to reply.

1st video
wont embed for some reason

http://www.youtube.com/watch?v=93pSJNZzNY8&NR=1

So far I've sprayed some tb cleaner into the iacv , I've cleaned the z32 afm , I've checked all vaccum lines for leaks before the throttle body

i then d/c the iacv electrical plug then i took this video with how it was idling with the plug off
http://www.youtube.com/watch?v=ubga-eSXyjI

i then blocked the pcv valve with the iacv unplugged. the car still ran but only just.

so now here i am. please keep in mind my sr is far from stock i have the following mods. i am aware my car wont idle perfect with bigger camshafts

Power fc
550cc injectors
sard fuel regulator
garrett 3071r turbo
hks camgears
hks valve springs
hks step 2 264 duration camshafts
cp forged pistons 86.5mm
bore size 86.58mm
heavy duty clutch
fmic
oil cooler
relocated oil filter

Sileighty_85 · 07-10-2011, 10:49 AM

You Vac is horrible, you got a huge leak somewhere.

Banana_Cute · 07-10-2011, 12:25 PM

^^^yea. check all hoses for cracks or kinks.

Maybe completely clean your TB and IACV by removing them and giving them a good scrubbing.

s14unimog · 07-10-2011, 12:54 PM

sounds like you might have air in the IACV coolant passages.. . The idle will surge like that if you don't get that out. It's especially easy to do if you're using a Greddy style intake manifold. Try bleeding the coolant from one of those lines. But definitely pressure test the charge system, there seems like there is a leak somewhere.

bogan · 07-10-2011, 04:31 PM

Ok if that fails what else should I try

bogan · 07-11-2011, 03:17 PM

Failed , no air in system

EDacIouSX · 07-11-2011, 03:22 PM

i cant really watch vids @ work... i fixed my idle problem over the weekend with some ground wires... I suspect though my idle issue is different from yours, mine was intermittent.

bogan · 07-11-2011, 03:32 PM

Yea mine is a continuous bad idle is say it will have to be a vaccum leak

bogan · 07-14-2011, 06:51 PM

Ok update , pulled manifold off checked every line all ok , changed gaskets and cleaned the iacv tested it while it was off as well seemed to work fine , idle problem is still there but in saying that it was idling bad then I opened my drivers door and the idle went good then I closed the door again idle went bad , electrical issue maybe ?

07-10-2011, 04:02 AM	#1
bogan Join Date: Feb 2011 Location: a house Age: 37 Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	sr20det idle issue hay all been having idle issues. i got a video of the issue ive been trying to resolve the issue on other sites but they take to long to reply. 1st video wont embed for some reason http://www.youtube.com/watch?v=93pSJNZzNY8&NR=1 So far I've sprayed some tb cleaner into the iacv , I've cleaned the z32 afm , I've checked all vaccum lines for leaks before the throttle body i then d/c the iacv electrical plug then i took this video with how it was idling with the plug off http://www.youtube.com/watch?v=ubga-eSXyjI i then blocked the pcv valve with the iacv unplugged. the car still ran but only just. so now here i am. please keep in mind my sr is far from stock i have the following mods. i am aware my car wont idle perfect with bigger camshafts Power fc 550cc injectors sard fuel regulator garrett 3071r turbo hks camgears hks valve springs hks step 2 264 duration camshafts cp forged pistons 86.5mm bore size 86.58mm heavy duty clutch fmic oil cooler relocated oil filter

07-10-2011, 10:49 AM	#2
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	You Vac is horrible, you got a huge leak somewhere. __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

07-10-2011, 12:25 PM	#3
Banana_Cute Zilvia FREAK! Join Date: Jan 2011 Location: Irvine, So. Cal. Posts: 1,338 Trader Rating: (16) Feedback Score: 16 reviews	^^^yea. check all hoses for cracks or kinks. Maybe completely clean your TB and IACV by removing them and giving them a good scrubbing. __________________ Simplicity is the key to brilliance

07-10-2011, 12:54 PM	#4
s14unimog Nissanaholic! Join Date: Dec 2003 Location: In a place, near a river, over a lake Age: 38 Posts: 2,415 Trader Rating: (22) Rides Gallery: s14unimog Feedback Score: 22 reviews	sounds like you might have air in the IACV coolant passages.. . The idle will surge like that if you don't get that out. It's especially easy to do if you're using a Greddy style intake manifold. Try bleeding the coolant from one of those lines. But definitely pressure test the charge system, there seems like there is a leak somewhere. __________________ Fuking ginger bread man stole my wallet... SHIFT*lock_slide to side d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson

07-10-2011, 04:31 PM	#5
bogan Join Date: Feb 2011 Location: a house Age: 37 Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	Ok if that fails what else should I try

07-11-2011, 03:17 PM	#6
bogan Join Date: Feb 2011 Location: a house Age: 37 Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	Failed , no air in system

07-11-2011, 03:22 PM	#7
EDacIouSX Post Whore! Join Date: Nov 2004 Location: Los Angeles Age: 39 Posts: 4,566 Trader Rating: (53) Rides Gallery: EDacIouSX Feedback Score: 53 reviews	i cant really watch vids @ work... i fixed my idle problem over the weekend with some ground wires... I suspect though my idle issue is different from yours, mine was intermittent.

07-11-2011, 03:32 PM	#8
bogan Join Date: Feb 2011 Location: a house Age: 37 Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	Yea mine is a continuous bad idle is say it will have to be a vaccum leak

07-14-2011, 06:51 PM	#9
bogan Join Date: Feb 2011 Location: a house Age: 37 Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	Ok update , pulled manifold off checked every line all ok , changed gaskets and cleaned the iacv tested it while it was off as well seemed to work fine , idle problem is still there but in saying that it was idling bad then I opened my drivers door and the idle went good then I closed the door again idle went bad , electrical issue maybe ?