frustration!!Car Dies when Headlights are on? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

BillyTheChamp · 05-08-2007, 04:19 PM

i have no idea what my cars problem is.. i have a sr20 red top in my s14.. tuned on my safc II.. the idle has always been weird but started going crazy after i changed my fuel filter.. it's lot more steady at idle but when i press the clutch to coast my idle drops down to 300 or so ,(doesn't die in the day time, and goes back up to about 700-800rpm.. at regular idle its round 1050.. so when i come to a stop it goes from 700-800 back up to 1050 or so.. the weird thing is when i drive at night and when my headlights and acc lights are on.. my car's idle dipps and doesnt come back up.. it tries to but then just ends up dying.. i thought it could be my bov but why does it only happen at night (i have blow through method).. i thought it was my alternator.. but the car's battery doesnt drain and car stays on even if i remove the battery.. i can also restart the car right away after it dies.. it must possibly be an electrical problem right? i still hit full boost when i punch it as well and dont see a noticable loss of power.. im getting real frustrated and am thinking of selling my car if i cant solve this problem.. oh yeah im running a gt2871 60 ar. tuned at 15 psi.. can lack of grounds be the prob? i only have 2 in the engine bay.. i have a multimeter but have no idea how to use it.. please help..

Billy

johngriff · 05-08-2007, 04:24 PM

Sounds like you did not wire power to the IACV. Try disconecting the electrical connector for the IACV and see if this makes a difference in idle, drive-ability.

BillyTheChamp · 05-08-2007, 07:35 PM

where is the IACV located? Pics

Sileighty_85 · 05-09-2007, 10:23 AM

One of the plugs on the left is for the IACV
The IACV is under the Intake Plenum Runners.

BillyTheChamp · 05-09-2007, 03:27 PM

thanks alot.. ill check this out today.. the funnything is it was working fine like a month ago.. so is it possible to short out the iacv?

cutter · 05-09-2007, 03:44 PM

it sound to me like its an electrical short. looks over your wiring harness and make sure that nothing has been cut. get a grounding kit.

05-08-2007, 04:19 PM	#1
BillyTheChamp Leaky Injector Join Date: Mar 2007 Location: Las Vegas Posts: 119 Trader Rating: (0) Feedback Score: 0 reviews	frustration!!Car Dies when Headlights are on? i have no idea what my cars problem is.. i have a sr20 red top in my s14.. tuned on my safc II.. the idle has always been weird but started going crazy after i changed my fuel filter.. it's lot more steady at idle but when i press the clutch to coast my idle drops down to 300 or so ,(doesn't die in the day time, and goes back up to about 700-800rpm.. at regular idle its round 1050.. so when i come to a stop it goes from 700-800 back up to 1050 or so.. the weird thing is when i drive at night and when my headlights and acc lights are on.. my car's idle dipps and doesnt come back up.. it tries to but then just ends up dying.. i thought it could be my bov but why does it only happen at night (i have blow through method).. i thought it was my alternator.. but the car's battery doesnt drain and car stays on even if i remove the battery.. i can also restart the car right away after it dies.. it must possibly be an electrical problem right? i still hit full boost when i punch it as well and dont see a noticable loss of power.. im getting real frustrated and am thinking of selling my car if i cant solve this problem.. oh yeah im running a gt2871 60 ar. tuned at 15 psi.. can lack of grounds be the prob? i only have 2 in the engine bay.. i have a multimeter but have no idea how to use it.. please help.. Billy

05-08-2007, 04:24 PM	#2
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	Sounds like you did not wire power to the IACV. Try disconecting the electrical connector for the IACV and see if this makes a difference in idle, drive-ability. __________________ [email protected]

05-09-2007, 10:23 AM	#4
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	One of the plugs on the left is for the IACV The IACV is under the Intake Plenum Runners. __________________ 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

05-08-2007, 07:35 PM	#3
BillyTheChamp Leaky Injector Join Date: Mar 2007 Location: Las Vegas Posts: 119 Trader Rating: (0) Feedback Score: 0 reviews	where is the IACV located? Pics

05-09-2007, 03:27 PM	#5
BillyTheChamp Leaky Injector Join Date: Mar 2007 Location: Las Vegas Posts: 119 Trader Rating: (0) Feedback Score: 0 reviews	thanks alot.. ill check this out today.. the funnything is it was working fine like a month ago.. so is it possible to short out the iacv?

05-09-2007, 03:44 PM	#6
cutter Zilvia Junkie Join Date: Jan 2004 Location: tyler tx Age: 41 Posts: 372 Trader Rating: (3) Feedback Score: 3 reviews	it sound to me like its an electrical short. looks over your wiring harness and make sure that nothing has been cut. get a grounding kit.