Performance & Maintenance Engine, forced induction, intakes, exhausts, torque converters, transmissions, etc.

Code DTC:31

Thread Tools
 
Search this Thread
 
Old 11-29-08, 01:04 PM
  #1  
sc4001992
Driver
Thread Starter
 
sc4001992's Avatar
 
Join Date: Sep 2006
Location: california
Posts: 114
Likes: 0
Received 0 Likes on 0 Posts
Default Code DTC:31

finally pulled the code, DTC:31 Vaf Circuit.

removed the maf again and sprayed maf cleaner into the hole in the end and let it dry etc. car stalls at first completely and dies at idle in park and drive. after it warms up the idle is uneven between 1k and 500 and there is a lot of hesitation during acceleration.

what to do....replace vaf?
Old 11-29-08, 01:23 PM
  #2  
5sp_jzz30
Lexus Champion
iTrader: (2)
 
5sp_jzz30's Avatar
 
Join Date: Apr 2007
Location: IL
Posts: 3,560
Likes: 0
Received 6 Likes on 5 Posts
Default

spraying or messing around with mafs in general is not recommended. my buddy sprayed some in his maf in a ka-t s14 and the maf took a chit.

on the other hang i took mine in my 93 sc300 and drenched it in brake clean to clean it and its all good.

depends of its karman vortex or hit wire i guess....and your luck.
Old 11-29-08, 01:43 PM
  #3  
sc4001992
Driver
Thread Starter
 
sc4001992's Avatar
 
Join Date: Sep 2006
Location: california
Posts: 114
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by 5sp_jzz30
spraying or messing around with mafs in general is not recommended. my buddy sprayed some in his maf in a ka-t s14 and the maf took a chit.

on the other hang i took mine in my 93 sc300 and drenched it in brake clean to clean it and its all good.

depends of its karman vortex or hit wire i guess....and your luck.
those stock parts? mine is a fujiman or something.
Old 11-29-08, 03:54 PM
  #4  
5sp_jzz30
Lexus Champion
iTrader: (2)
 
5sp_jzz30's Avatar
 
Join Date: Apr 2007
Location: IL
Posts: 3,560
Likes: 0
Received 6 Likes on 5 Posts
Default

karman vortex and hot wire refers to the type of sensor it is. not the manufacturer.

the 92-96 sc's are karman vortex if i recall correctly and 97+ are hot wire. they use different ways to measure are flow.
Old 12-09-08, 05:26 PM
  #5  
sc4001992
Driver
Thread Starter
 
sc4001992's Avatar
 
Join Date: Sep 2006
Location: california
Posts: 114
Likes: 0
Received 0 Likes on 0 Posts
Default

replaced with used maf, cel gone, runs great.
Old 12-09-08, 08:40 PM
  #6  
5sp_jzz30
Lexus Champion
iTrader: (2)
 
5sp_jzz30's Avatar
 
Join Date: Apr 2007
Location: IL
Posts: 3,560
Likes: 0
Received 6 Likes on 5 Posts
Default

lesson learned...never do anything with the maf
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
scunyon
LS - 1st and 2nd Gen (1990-2000)
3
05-16-16 03:20 PM
Lowskee
Performance & Maintenance
3
08-20-10 01:40 PM
miraluna
SC- 1st Gen (1992-2000)
8
05-17-10 03:18 AM
sliva001
Performance & Maintenance
7
01-20-07 07:45 PM
Dx3
Performance & Maintenance
11
01-26-05 06:52 PM



Quick Reply: Code DTC:31



All times are GMT -7. The time now is 04:15 PM.