PCM Diagnostics & Tuning HP Tuners | Holley | Diablo
Sponsored by:
Sponsored by:

MAF unplugged car wont idle why

Thread Tools
 
Search this Thread
 
Old 12-22-2016, 07:00 PM
  #1  
On The Tree
Thread Starter
iTrader: (12)
 
camarovon's Avatar
 
Join Date: Dec 2011
Posts: 195
Likes: 0
Received 0 Likes on 0 Posts
Default MAF unplugged car wont idle why

01 camaro 408 244/248 cam,car wont idle at all when i unplug maf,trying to tune the car
Old 12-23-2016, 08:13 AM
  #2  
TECH Senior Member
iTrader: (3)
 
Old Geezer's Avatar
 
Join Date: Jun 2004
Location: GA, USA
Posts: 5,640
Received 69 Likes on 61 Posts

Default

MAF have the IAT sensor in it?
Old 12-23-2016, 09:14 AM
  #3  
TECH Addict
 
gagliano7's Avatar
 
Join Date: Aug 2005
Location: Monroe,NY
Posts: 2,265
Likes: 0
Received 114 Likes on 91 Posts

Default

VE table way off?
Old 12-23-2016, 04:11 PM
  #4  
Launching!
 
jaydubb's Avatar
 
Join Date: Mar 2007
Location: DC Metro area
Posts: 227
Received 29 Likes on 22 Posts

Default

VE table needs a lot of work. Did you fail the MAF properly? Can you post tune and log?
Old 12-23-2016, 05:27 PM
  #5  
On The Tree
Thread Starter
iTrader: (12)
 
camarovon's Avatar
 
Join Date: Dec 2011
Posts: 195
Likes: 0
Received 0 Likes on 0 Posts
Default tune and log

this is my tune and log
Attached Files
File Type: hpl
66666.hpl (132.4 KB, 107 views)
File Type: hpt
otis new tune.hpt (227.5 KB, 81 views)
Old 12-23-2016, 06:22 PM
  #6  
Launching!
 
jaydubb's Avatar
 
Join Date: Mar 2007
Location: DC Metro area
Posts: 227
Received 29 Likes on 22 Posts

Default

Your MAF is not failed properly. Your displacement is stock. Set the MAF DTC's to MIL on First Error. High RPM Dynamic Disable to 12000. MAF failure frequecy to 0 or 1 HZ. VE table... I had to LOWER my tables, not increase them after I was cammed. What version of HPT? You need a STFT error vs MAP histogram/chart. Post your layout or config file.
Old 12-23-2016, 06:30 PM
  #7  
Launching!
 
L92 OLDS's Avatar
 
Join Date: Feb 2015
Posts: 245
Received 21 Likes on 14 Posts
Default

Originally Posted by camarovon
01 camaro 408 244/248 cam,car wont idle at all when i unplug maf,trying to tune the car
I had the opposite problem. My bench tune was way too lean and the engine would not stay running. The only way to keep it running was to unplug the MAF and IAT so the ECM would divert to speed density. This took at least 5 successive start attempts before the ECM realized there was no MAF or IAT connected.
Old 12-31-2016, 05:50 PM
  #8  
TECH Addict
iTrader: (47)
 
rpturbo's Avatar
 
Join Date: Nov 2008
Location: A-Town, Ill side
Posts: 2,370
Received 202 Likes on 166 Posts

Default

Originally Posted by jaydubb
Your MAF is not failed properly. Your displacement is stock. Set the MAF DTC's to MIL on First Error. High RPM Dynamic Disable to 12000. MAF failure frequecy to 0 or 1 HZ. VE table... I had to LOWER my tables, not increase them after I was cammed. What version of HPT? You need a STFT error vs MAP histogram/chart. Post your layout or config file.
Generally speaking yes, you have to lower them down low, then they even out for a very short period, then, they need to be added to the farther you go. Other than that, 100% on the head right here!
Old 01-02-2017, 03:10 PM
  #9  
Launching!
 
jaydubb's Avatar
 
Join Date: Mar 2007
Location: DC Metro area
Posts: 227
Received 29 Likes on 22 Posts

Default

Originally Posted by rpturbo
Generally speaking yes, you have to lower them down low, then they even out for a very short period, then, they need to be added to the farther you go. Other than that, 100% on the head right here!
Correct. I should have stated in the idle area. My bad. Is the OP still here? I just saw his PM from the 23rd and I just responded. SMH. Ive partying too hard over the holidays. LOL!



Quick Reply: MAF unplugged car wont idle why



All times are GMT -5. The time now is 05:20 PM.