5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Misfire

Thread Tools
 
Search this Thread
 
Old 08-22-2008, 11:07 PM
  #1  
mattwright101
2nd Gear Member
Thread Starter
 
mattwright101's Avatar
 
Join Date: Dec 2007
Location:
Posts: 234
Default Misfire

ok
so i finally got my summit ignition box.
wired it all up 100% to the specs in the directions and now it has a huge misfire once it hits 2000 RPMS.
ive checked and double checked all the connections, grounds and everything
im clueless at this point
mattwright101 is offline  
Old 08-23-2008, 09:49 AM
  #2  
mattwright101
2nd Gear Member
Thread Starter
 
mattwright101's Avatar
 
Join Date: Dec 2007
Location:
Posts: 234
Default

bump..
mattwright101 is offline  
Old 08-23-2008, 10:54 AM
  #3  
mjr46
D.R. THE PATHETIC DORK
 
mjr46's Avatar
 
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
Default

un hook the box and try stock ignition to narrow problem down
mjr46 is offline  
Old 08-23-2008, 11:08 AM
  #4  
mattwright101
2nd Gear Member
Thread Starter
 
mattwright101's Avatar
 
Join Date: Dec 2007
Location:
Posts: 234
Default

well
it had a very slight misfire before, but not all the time
new cap, rotor, wires, new injectors, fuel filter etc etc...
i just cant seem to find wtf is going ont
mattwright101 is offline  
Old 08-23-2008, 11:26 AM
  #5  
mjr46
D.R. THE PATHETIC DORK
 
mjr46's Avatar
 
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
Default

what about new plugs??? if you got platnium plugs in it and they are new I'd ditch them in favor of standard copper core resistor plug like an autolite 25
mjr46 is offline  
Old 08-23-2008, 11:49 AM
  #6  
mattwright101
2nd Gear Member
Thread Starter
 
mattwright101's Avatar
 
Join Date: Dec 2007
Location:
Posts: 234
Default

already got 25s in it man
they are a week old haha
mattwright101 is offline  
Old 08-23-2008, 03:07 PM
  #7  
mjr46
D.R. THE PATHETIC DORK
 
mjr46's Avatar
 
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
Default

well IMO an occiliscope is the only way to find intermitent or slight misfires, if it's a large one using the koer function of the ecm perform a cylinder balance test
mjr46 is offline  
Old 08-23-2008, 05:24 PM
  #8  
mattwright101
2nd Gear Member
Thread Starter
 
mattwright101's Avatar
 
Join Date: Dec 2007
Location:
Posts: 234
Default

yea im just gonna take it to the mechanic on monday
i cant run the codes myself because it wont let me run the KOER test.
it refuses to work
mattwright101 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Urambo Tauro
4.6L (1996-2004 Modular) Mustang
1
06-10-2016 03:28 AM
Omgitsa88Stang
5.0L General Discussion
5
10-05-2015 07:33 AM
bconboy
2005-2014 Mustangs
16
09-21-2015 12:52 PM
chrisc
V6 S197 General Discussion
8
02-10-2006 10:16 PM
ghoste
4.6L (1996-2004 Modular) Mustang
9
09-07-2005 11:42 AM



Quick Reply: Misfire



All times are GMT -5. The time now is 03:40 AM.