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| Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series. |
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02-15-2018, 04:15 PM
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#1 |
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Zilvia Addict
 
Join Date: Sep 2009
Location: los angeles
Age: 33
Posts: 960
Trader Rating: (10)
 Feedback Score: 10 reviews
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Idle drops when I come to a stop
Ok so everytime I drive and shift to neutral the rpms drop to like 400 sometimes 0 and then picks back up slowly or it stalls my idle is set to 850 rpms .. things I have done clean my maf and replaced it with another one it does the same thing replaced my intercooler kit and did a boost leak test , change my bov to greddy fv one and tightened it up , checked my fpr and it’s at 36 psi at idle. I also have a new fuel pump other than that the car pulls fine it’s just when it comes to a slow stop idk what to do
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02-16-2018, 05:14 PM
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#2 |
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Zilvia Member
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It is because your BOV is not recirculated. Common problem. Do some searching for remedies. A super- AFC can help tune this out.
Sent from my SAMSUNG-SM-G930A using Tapatalk |
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02-18-2018, 11:41 PM
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#3 | |
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Zilvia Addict
Join Date: Sep 2009
Location: los angeles
Age: 33
Posts: 960
Trader Rating: (10)
Feedback Score: 10 reviews
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02-24-2018, 04:29 PM
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#4 |
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Zilvia Junkie
 
Join Date: Nov 2012
Location: wisconsin
Age: 32
Posts: 448
Trader Rating: (7)
 Feedback Score: 7 reviews
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im guessing an SR?
have you tried adjusting the idle? does it do this only when its warm? and 36 psi is a bit low for the fuel pressure but I don't think that's your problem (unless u set it that low with an adjustable fpr)
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02-24-2018, 06:38 PM
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#5 |
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Nissanaholic!
 
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idle control valve
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02-25-2018, 06:49 PM
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#6 |
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Nissanaholic!
Join Date: Feb 2012
Location: Oxnard, CA
Age: 30
Posts: 1,890
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Feedback Score: 31 reviews
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Well if you're recirculated (I'm assuming properly between maf and turbo) then it's down to the aacv as kat-pwr said. Take it off and brake clean out the carbon deposits it most likely has in there. Also... How's your recirculation setup on the intake? Stock boot? Aluminum pipe?
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02-26-2018, 09:56 AM
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#7 |
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Leaky Injector
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I actually read something a while back I remember reading something about checking your fuel pressure it’s supposed to be at around 43 psi idk if that would help
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02-26-2018, 02:30 PM
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#8 | |
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Post Whore!
 
Join Date: Mar 2009
Location: Maricopa, AZ
Age: 33
Posts: 7,721
Trader Rating: (10)
Feedback Score: 10 reviews
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Set fuel pressure to 43 psi.
Take off the iacv, and completely disassemble it, clean out all the crap that builds up inside it. Make sure the throttle plate is fully closed at 0 throttle. Verify TPS voltage is proper at 0 throttle. Set the iacv fairly open, let the engine warm up and set the desired idle. Double check ignition/CAS timing is 15 btdc.
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03-01-2018, 09:35 PM
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#9 |
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Zilvia Junkie
Join Date: Apr 2007
Location: Denver Colorado
Posts: 500
Trader Rating: (3)
Feedback Score: 3 reviews
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Idle drops when I come to a stop
I had the MAF ground wired to chassi ground. (Z32 MAF)
Wired it to the ecu like your supposed to and fixed that right away. How’s your MAF wired? My bov has always been recirculated too Sent from my iPhone using Tapatalk Last edited by nissansrdub; 03-01-2018 at 09:36 PM.. Reason: Added |
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