Idle Issues - MY350Z.COM - Nissan 350Z and 370Z Forum Discussion



Engine & Drivetrain
VQ Power and Delivery



Reply
 
 
 
Thread Tools Search this Thread
Old 08-09-2017, 06:45 PM   #1
FairladyZ34
Registered User
Thread Starter
 
FairladyZ34's Avatar
 
Join Date: Oct 2005
Location: Knoxville, Tennessee
Posts: 79
Thanks: 0
Thanked 2 Times in 2 Posts
Default Idle Issues

I installed a brand new Kinetix Velocity manifold on my Z today after running the V+ plenum for years with no issues, and now the car idles at between 1300-1500 rpm and occasionally the idle will start to creep up to 2000 rpm with no throttle input. I've checked for vacuum leaks and loose connectors but everything checks out. I've done the accelerator pedal position learning, throttle valve closed learning, and idle volume learning multiple times with no change, i also disconnected the battery to reset and no change. It is throwing the codes 0507, 0223, 0124, 0420. After the battery reset it only blinks slowly 3 times then stops then blinks slowly 2 times and goes back to continuous on. I've tried everything I can think of, so any help would be greatly appreciated.
FairladyZ34 is offline   Reply With Quote
Old 08-10-2017, 01:48 AM   #2
BluestreamDE
Registered User
 
BluestreamDE's Avatar
 
Join Date: Mar 2016
Location: Texas
Posts: 441
Thanked 56 Times in 48 Posts
Default

Did you clean your Throttle body and mess with the plate by moving it with your hand or a rag? Is it connected properly to your wiring harness? Those are mostly throttle body codes.

Do a throttlebody relearn procedure. If that doesn't work maybe your throttle body needs replacing. But thus is just my guess
BluestreamDE is offline   Reply With Quote
Old 08-10-2017, 07:26 AM   #3
Atreyu'z 350
Registered User
 
Atreyu'z 350's Avatar
 
Join Date: Jan 2017
Location: Pennsylvania
Posts: 670
Thanked 70 Times in 65 Posts
Default

Were there any issues/codes thrown prior to you performing this intake swap? A lot of these codes piggyback off of one another with the originator suggesting a vacuum leak or irregular peaks/dips in voltage and/or voltage continuity to and from the throttle body.. Check the course of the wiring to your throttle body for any damage as a result of this intake swap(although unlikely if you were careful). It's also possible that you inadvertently fouled up the zero-point on the throttle body by moving/touching the butterfly valve; however, by you performing the throttle position relearn should've remedied this, if that was all that was wrong.. Assuming that all other avenues are covered, like vacuum leaks, throttle body wiring shortages and a throttle position relearn, I would then start addressing the throttle body itself along with the throttle position sensors.. It also wouldn't hurt to replace your throttle control motor relay located within the IPDM.
Atreyu'z 350 is online now   Reply With Quote
Old 08-10-2017, 10:24 AM   #4
FairladyZ34
Registered User
Thread Starter
 
FairladyZ34's Avatar
 
Join Date: Oct 2005
Location: Knoxville, Tennessee
Posts: 79
Thanks: 0
Thanked 2 Times in 2 Posts
Default

I did wipe the throttle body out with a rag but it was disconnected from the harness and i did the reset multiple times. I can hear the throttle body moving when doing the reset just as the write up says. I have checked the wiring and everything looks good, no stripped or cut wires. There were no codes prior to install. I cant hear any whistling or hissing that would be associated with a vacuum leak and throttle response is normal which would also indicate no vacuum leak......aside from the high/creeping idle. When free revving the car it revs up fine but as the revs are coming back down it hiccups at around 2000rpm and drops to 1000rpm for a second before returning to 1500rpm.
FairladyZ34 is offline   Reply With Quote
Old 08-11-2017, 04:46 AM   #5
Atreyu'z 350
Registered User
 
Atreyu'z 350's Avatar
 
Join Date: Jan 2017
Location: Pennsylvania
Posts: 670
Thanked 70 Times in 65 Posts
Default

Ok. Did you get it tuned with the Kinetix V+ plenum on?.. Try cleaning your MAF sensor too... Maybe post a sound clip.
Atreyu'z 350 is online now   Reply With Quote
Old 08-11-2017, 05:42 AM   #6
iideadeyeii
Registered User
iTrader: (6)
 
Join Date: Nov 2011
Location: Lawtown
Posts: 2,135
Thanked 77 Times in 60 Posts
Default

I'd put the v+ back on. I don't think there is any benefit from the velocity unless you're over like 5-600whp iirc or something high like that.
iideadeyeii is online now   Reply With Quote
Old 08-11-2017, 06:09 AM   #7
FairladyZ34
Registered User
Thread Starter
 
FairladyZ34's Avatar
 
Join Date: Oct 2005
Location: Knoxville, Tennessee
Posts: 79
Thanks: 0
Thanked 2 Times in 2 Posts
Default

The car has never been tuned. I will clean the maf, but it was never taken loose durning install. I'm going to replace the throttle body if I cant get this figured out, I will try to get a video uploaded. I'm not going to put the V+ back on, I will be doing a custom turbo set up on the car this winter and the V+ had started to deteriorate at the bolt holes from heat (has been on the car for 9 years) so it was time for a replacement. I know the power gains N/A are negligible at best, but this issue isn't stemming from the velocity manifold. Replacing it with something else won't fix the problem.
FairladyZ34 is offline   Reply With Quote
Old 08-11-2017, 07:01 AM   #8
Atreyu'z 350
Registered User
 
Atreyu'z 350's Avatar
 
Join Date: Jan 2017
Location: Pennsylvania
Posts: 670
Thanked 70 Times in 65 Posts
Default

Quote:
Originally Posted by FairladyZ34 View Post
The car has never been tuned. I will clean the maf, but it was never taken loose durning install. I'm going to replace the throttle body if I cant get this figured out, I will try to get a video uploaded. I'm not going to put the V+ back on, I will be doing a custom turbo set up on the car this winter and the V+ had started to deteriorate at the bolt holes from heat (has been on the car for 9 years) so it was time for a replacement. I know the power gains N/A are negligible at best, but this issue isn't stemming from the velocity manifold. Replacing it with something else won't fix the problem.


But then I think, just swapping upper plenums wouldn't cause these issues.. It wouldn't hurt to try swapping the V+ back on to see if these issues remain. Because if they don't, there's no reason to go spend money on a new throttle body. But if the issues DO remain, replacing the throttle body would be justified...
Atreyu'z 350 is online now   Reply With Quote
Old 08-11-2017, 08:43 AM   #9
FairladyZ34
Registered User
Thread Starter
 
FairladyZ34's Avatar
 
Join Date: Oct 2005
Location: Knoxville, Tennessee
Posts: 79
Thanks: 0
Thanked 2 Times in 2 Posts
Default

Update, I believe now it is a throttle body issue. I can start the car and it will bounce between 1500 and 2000rpm, turn the key off and back on without letting the car die and it will hold idle at 1300.......a vacuum leak would be constant no matter what i did electronically. Tried to upload a video and video failed to upload.
FairladyZ34 is offline   Reply With Quote
Old 08-11-2017, 08:48 AM   #10
PDose
Registered User
 
Join Date: Jul 2012
Location: Virginia
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
Default

When you cleaned the throttle bodies did you disconnect them or the ecu? I had a similar problem with my throttle bodies and found out I fried my ecu. It wouldn't relearn. My first recommendation would be buy a obd2 Bluetooth device, they are only like 20$. There are apps that do the relearn without the peddle procedure.
PDose is offline   Reply With Quote
Old 08-11-2017, 10:08 AM   #11
Atreyu'z 350
Registered User
 
Atreyu'z 350's Avatar
 
Join Date: Jan 2017
Location: Pennsylvania
Posts: 670
Thanked 70 Times in 65 Posts
Default

Quote:
Originally Posted by FairladyZ34 View Post
Update, I believe now it is a throttle body issue. I can start the car and it will bounce between 1500 and 2000rpm, turn the key off and back on without letting the car die and it will hold idle at 1300.......a vacuum leak would be constant no matter what i did electronically. Tried to upload a video and video failed to upload.


OK.. This might not be ''recommended'' but if done in a dust/wind free environment, a couple of minutes isn't going to hurt. Start the car and remove the intake tube where it connects to the throttle body and watch for the butterfly valve to open/close in correlation with the idle fluctuations... you'll probably get the CEL for the MAF, but it's ok for now.

Last edited by Atreyu'z 350; 08-11-2017 at 10:10 AM. Reason: maf
Atreyu'z 350 is online now   Reply With Quote
Old 08-11-2017, 10:16 AM   #12
FairladyZ34
Registered User
Thread Starter
 
FairladyZ34's Avatar
 
Join Date: Oct 2005
Location: Knoxville, Tennessee
Posts: 79
Thanks: 0
Thanked 2 Times in 2 Posts
Default

Issue resolved........dont ask me how though. I got frustrated with the car and quit for a few, a buddy came by to help, I went back out and started the car to show him what it was doing........idled at 700rpm......no fluctuations, no hiccups, like the day I brought it home from the dealership. Car seems to be fine now, or my buddy has magical powers he doesnt know about lol. I appreciate all the help guys.
FairladyZ34 is offline   Reply With Quote
The Following User Says Thank You to FairladyZ34 For This Useful Post:
Atreyu'z 350 (08-11-2017)
Old 08-11-2017, 10:35 AM   #13
Atreyu'z 350
Registered User
 
Atreyu'z 350's Avatar
 
Join Date: Jan 2017
Location: Pennsylvania
Posts: 670
Thanked 70 Times in 65 Posts
Default

Ok we need to start cloning your buddy now..
Atreyu'z 350 is online now   Reply With Quote
Old 08-11-2017, 01:15 PM   #14
FairladyZ34
Registered User
Thread Starter
 
FairladyZ34's Avatar
 
Join Date: Oct 2005
Location: Knoxville, Tennessee
Posts: 79
Thanks: 0
Thanked 2 Times in 2 Posts
Default

Lol or he can just travel around the county to all Z owners houses for a small fee. Thanks again for all the help.
FairladyZ34 is offline   Reply With Quote
The Following User Says Thank You to FairladyZ34 For This Useful Post:
Atreyu'z 350 (08-12-2017)
Old 08-12-2017, 01:38 PM   #15
Atreyu'z 350
Registered User
 
Atreyu'z 350's Avatar
 
Join Date: Jan 2017
Location: Pennsylvania
Posts: 670
Thanked 70 Times in 65 Posts
Default

Lol Or that. No problem, bro. Nice engine bay btw
Atreyu'z 350 is online now   Reply With Quote
 
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -8. The time now is 09:35 AM.


Copyright 2002 - 2017, MY350Z.COM All Rights Reserved.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: