very harsh idel wiht 840cc injectors - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

moonshinekouki · 10-17-2008, 10:19 AM

so i got my s14 with rb25det series one with:
aem ems
840cc
gt35
44mm waste gate
it made 501 whrp at 19 pounds.

now my issue is that regardless of cold/warm start i cant get it to idle unless i have to hold the gas peddle down for about a min then it will idle amazingly at 1100rpm thats pretty damn good for 840cc injectors.
any tips of what i should be checking out to see why its doing this?

also does anyone know why the aem if u go lock to lock with the steering wheel the car stalls out is it becuase the ps pump goes on and off?

thanks for hte help in advance.
mikey

Addicted2Kouki · 10-17-2008, 11:00 AM

did you tune it for the 840cc injectors?

*fliprayzin240sx* · 10-17-2008, 11:17 AM

The better question is what brand injectors are they? Some injectors idle better than some. I got some Sard 850s on my SR w/ PFC and they idle like i got stock 370s in there...

moonshinekouki · 10-18-2008, 11:58 PM

yeah ther etuend for 840ccs
but my tuner called aem and even they said taht regardless of what brand injecotrs its hard to get 840ccs to idle properly with the aem.

there detchworths

steve shadows · 10-19-2008, 04:24 AM

This is another issue I have with the AEM unit.

Haltech totally trumps the AEM in every respect when it comes to simplifying the break down of injector set ups. You can actually control the actual injector voltage, wheer the AEM just has pre-set injector settings which may not be a perfect fit in reality.

Sounds like an issue with wiring or possibly some sort of flaw in your AEM unit or the setup of your Idle configurations in the idle maps (again over complicatingf it)>

moonshinekouki · 10-20-2008, 10:34 AM

thanks steve
u seem like the go to dude for tuning on zilvia
ill try and trace the wiring and hope its not the aem.

Darius · 10-20-2008, 10:53 AM

Your tuner doesn't know what he's talking about. Did you change the injector lag settings for the larger injectors? Deatchwerks has a spreadsheet for their injector latencies, and it lists what you should set them for in your EMS.

I don't see 840cc's listed. Are they purple side feeds? Did you have upgraded injectors before these?

moonshinekouki · 10-20-2008, 11:30 AM

nope i had stock injectors before with stock ecu.

10-17-2008, 10:19 AM	#1
moonshinekouki Zilvia Junkie Join Date: Nov 2005 Location: Toronto Posts: 350 Trader Rating: (2) Feedback Score: 2 reviews	very harsh idel wiht 840cc injectors so i got my s14 with rb25det series one with: aem ems 840cc gt35 44mm waste gate it made 501 whrp at 19 pounds. now my issue is that regardless of cold/warm start i cant get it to idle unless i have to hold the gas peddle down for about a min then it will idle amazingly at 1100rpm thats pretty damn good for 840cc injectors. any tips of what i should be checking out to see why its doing this? also does anyone know why the aem if u go lock to lock with the steering wheel the car stalls out is it becuase the ps pump goes on and off? thanks for hte help in advance. mikey __________________

10-17-2008, 11:17 AM	#3
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	The better question is what brand injectors are they? Some injectors idle better than some. I got some Sard 850s on my SR w/ PFC and they idle like i got stock 370s in there... __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

10-18-2008, 11:58 PM	#4
moonshinekouki Zilvia Junkie Join Date: Nov 2005 Location: Toronto Posts: 350 Trader Rating: (2) Feedback Score: 2 reviews	yeah ther etuend for 840ccs but my tuner called aem and even they said taht regardless of what brand injecotrs its hard to get 840ccs to idle properly with the aem. there detchworths __________________

10-19-2008, 04:24 AM	#5
steve shadows Post Whore! Join Date: Aug 2003 Location: LA and OC Posts: 8,202 Trader Rating: (5) Feedback Score: 5 reviews	This is another issue I have with the AEM unit. Haltech totally trumps the AEM in every respect when it comes to simplifying the break down of injector set ups. You can actually control the actual injector voltage, wheer the AEM just has pre-set injector settings which may not be a perfect fit in reality. Sounds like an issue with wiring or possibly some sort of flaw in your AEM unit or the setup of your Idle configurations in the idle maps (again over complicatingf it)> __________________ Like Me on FaceBook !

10-20-2008, 10:34 AM	#6
moonshinekouki Zilvia Junkie Join Date: Nov 2005 Location: Toronto Posts: 350 Trader Rating: (2) Feedback Score: 2 reviews	thanks steve u seem like the go to dude for tuning on zilvia ill try and trace the wiring and hope its not the aem. __________________

10-20-2008, 10:53 AM	#7
Darius Zilvia Junkie Join Date: Mar 2005 Location: Chicago Posts: 346 Trader Rating: (5) Feedback Score: 5 reviews	Your tuner doesn't know what he's talking about. Did you change the injector lag settings for the larger injectors? Deatchwerks has a spreadsheet for their injector latencies, and it lists what you should set them for in your EMS. I don't see 840cc's listed. Are they purple side feeds? Did you have upgraded injectors before these?

10-20-2008, 11:30 AM	#8
moonshinekouki Zilvia Junkie Join Date: Nov 2005 Location: Toronto Posts: 350 Trader Rating: (2) Feedback Score: 2 reviews	nope i had stock injectors before with stock ecu. __________________

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