EvolutionM - Mitsubishi Lancer and Lancer Evolution Community

Notices
Evo General Discuss any generalized technical Evo related topics that may not fit into the other forums. Please do not post tech and rumor threads here.
Sponsored by: RavSpec - JDM Wheels Central

Stock Evo9

Thread Tools
 
Search this Thread
 
Old Feb 23, 2013, 06:05 PM
  #1  
Evolving Member
Thread Starter
iTrader: (6)
 
Mrauto50's Avatar
 
Join Date: Jan 2008
Location: Darlington, S.C.
Posts: 116
Likes: 0
Received 0 Likes on 0 Posts
Stock Evo9
I have a friend with a bone stock Evo9 MR. Today he added a Jmfab intake with a Perrin filter. Now when he slows down at a stop light it wants to stumble. He let the car just set and idle and after a few seconds it will drop down to 500rpms and start stumbling. Any ideas guys?
Mrauto50 is offline  
Reply Like
Old Feb 23, 2013, 06:06 PM
  #2  
Evolved Member
iTrader: (49)
 
06RedRalli's Avatar
 
Join Date: Jul 2007
Location: Killeen,Tx
Posts: 869
Likes: 0
Received 3 Likes on 3 Posts
Maf plugged back in?

With the new intake is his bypass valve venting to the atmosphere?
06RedRalli is offline  
Reply Like
Old Feb 23, 2013, 06:13 PM
  #3  
Evolving Member
Thread Starter
iTrader: (6)
 
Mrauto50's Avatar
 
Join Date: Jan 2008
Location: Darlington, S.C.
Posts: 116
Likes: 0
Received 0 Likes on 0 Posts
MAF is plugged up. The boost cel is plugged into the intake pipe also. I just took the pipe off of my car to go SD. Its hooked up just like I had it. Could it be he is getting that much more air that it has thrown the tune off? We tried resetting the ecu by un hooking the battery.
Mrauto50 is offline  
Reply Like
Old Feb 23, 2013, 06:14 PM
  #4  
EvoM Community Team
iTrader: (134)
 
golgo13's Avatar
 
Join Date: May 2007
Location: @ a track near you
Posts: 3,619
Received 28 Likes on 18 Posts
My vote is to get a tune.

golgo13 is offline  
Reply Like
Old Feb 23, 2013, 06:16 PM
  #5  
Evolved Member
iTrader: (49)
 
06RedRalli's Avatar
 
Join Date: Jul 2007
Location: Killeen,Tx
Posts: 869
Likes: 0
Received 3 Likes on 3 Posts
Bpv on backwards?

Remember the top hat to say goes towards the front of the car.
06RedRalli is offline  
Reply Like
Old Feb 23, 2013, 06:17 PM
  #6  
Evolving Member
iTrader: (1)
 
rich3389's Avatar
 
Join Date: Dec 2012
Location: Earth
Posts: 213
Likes: 0
Received 1 Like on 1 Post
Boost leak test done?
rich3389 is offline  
Reply Like
Old Feb 23, 2013, 06:18 PM
  #7  
Evolved Member
iTrader: (12)
 
10isace's Avatar
 
Join Date: Nov 2008
Location: East of the Rockies
Posts: 1,052
Received 15 Likes on 10 Posts
Post a pic.
10isace is offline  
Reply Like

Trending Topics

Old Feb 23, 2013, 06:27 PM
  #8  
Evolving Member
Thread Starter
iTrader: (6)
 
Mrauto50's Avatar
 
Join Date: Jan 2008
Location: Darlington, S.C.
Posts: 116
Likes: 0
Received 0 Likes on 0 Posts
I'll see if I can get a pic.
Bpv on backwards? What is the BPV?
Mrauto50 is offline  
Reply Like
Old Feb 23, 2013, 06:58 PM
  #9  
Evolved Member
iTrader: (49)
 
06RedRalli's Avatar
 
Join Date: Jul 2007
Location: Killeen,Tx
Posts: 869
Likes: 0
Received 3 Likes on 3 Posts
The bypass valve...or some ppl refer to blow off valve
06RedRalli is offline  
Reply Like
Old Feb 23, 2013, 07:28 PM
  #10  
Evolving Member
Thread Starter
iTrader: (6)
 
Mrauto50's Avatar
 
Join Date: Jan 2008
Location: Darlington, S.C.
Posts: 116
Likes: 0
Received 0 Likes on 0 Posts
Here are the pics. Hope it helps. He doesn't have anything on the crank case vent on the valve cover. Not sure if that's it.
http://s1338.beta.photobucket.com/us...tml?sort=3&o=0

http://s1338.beta.photobucket.com/us...tml?sort=3&o=1

http://s1338.beta.photobucket.com/us...tml?sort=3&o=2
Mrauto50 is offline  
Reply Like
Old Feb 23, 2013, 07:59 PM
  #11  
Newbie
 
evo9what?'s Avatar
 
Join Date: Nov 2011
Location: Monroe, NC
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Probably needs a tune. Common issue when changing out intake piping.
evo9what? is offline  
Reply Like
Old Feb 23, 2013, 09:22 PM
  #12  
Evolving Member
 
slimjim1804's Avatar
 
Join Date: Oct 2012
Location: north Jersey
Posts: 246
Likes: 0
Received 0 Likes on 0 Posts
MAF probably isn't playing nicely with the new intake. Tune it.
slimjim1804 is offline  
Reply Like
Old Feb 24, 2013, 03:30 PM
  #13  
Newbie
iTrader: (3)
 
tehhobbs's Avatar
 
Join Date: Jul 2012
Location: Under A Rock...
Posts: 15
Likes: 0
Received 0 Likes on 0 Posts
Put the stock intake back on the car until you guys can get it tuned, also would be a good idea to check for leaks in the intake post MAF that could be causing the idle die issue.
tehhobbs is offline  
Reply Like
Old Feb 24, 2013, 03:40 PM
  #14  
Evolved Member
iTrader: (86)
 
4RETECH's Avatar
 
Join Date: Oct 2009
Location: Orange/Rockland, NY
Posts: 1,759
Received 4 Likes on 4 Posts
Check the piping couplers behind the MAF. Something might be leaking air. Funniest thing is a boost leak wouldn't be able to determine that because you have to remove intake to check for leaks, LOL
4RETECH is offline  
Reply Like
Old Feb 24, 2013, 04:47 PM
  #15  
Evolving Member
iTrader: (18)
 
Czarcasm's Avatar
 
Join Date: Nov 2012
Location: Iowa
Posts: 374
Likes: 0
Received 0 Likes on 0 Posts
Take another photo of the bpv, looks to me its not installed correctly
Czarcasm is offline  
Reply Like



Advanced Search
Quick Reply: Stock Evo9


Reply Closed Thread Share

All times are GMT -7. The time now is 01:12 AM.