4.6 running rough / misfire - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 01-05-2013, 04:31 PM   #1
Registered Member
Regular
 
96Roushgt's Avatar
 
Join Date: May 2012
Region: Ohio
Posts: 21
4.6 running rough / misfire

My 96 gt is running rough and missing. I can smell gas on the driver side of the engine. I don't think it's the COP's or the 2 coil packs themselves. Maybe bad plugs? Any suggestions? Also about a week ago I was driving home from work, went to throw it into neutral and the car died. Started it back up and it ran like it does now. About 2 miles down the road it eventually straitened itself out. Help?
96Roushgt is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 01-05-2013, 06:26 PM   #2
Registered Member
Regular
 
Mathew r Wright's Avatar
 
Join Date: Sep 2011
Region: Oklahoma
Posts: 470
Maybe an exhaust leak? Mine lost some nuts after I put my mid pipe on and it leaked @ the headers. Made it run lean and everything, even with the same symptoms...
Mathew r Wright is offline   Reply With Quote
Old 01-05-2013, 06:47 PM   #3
Registered Member
Regular
 
96Roushgt's Avatar
 
Join Date: May 2012
Region: Ohio
Posts: 21
It does have an exaust leak. Right at the flange where the intermediate pipe meets the manifold pipe. Couldn't line it up right when I replaced my clutch. Is it possible the exaust leak could make it run like that???
96Roushgt is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 01-05-2013, 06:56 PM   #4
Registered Member
Regular
 
Mathew r Wright's Avatar
 
Join Date: Sep 2011
Region: Oklahoma
Posts: 470
Very possible because I was trying to figure it out then I told myself to just listen so when I really started paying attention I herd like a flutter noise so got under there and seen I was missing a nut on each side and it did have a bank 2 lean code. So I went to lowes got some nuts and some lock tight and do believe I fixed it... It doesn't die when coming to a stop anymore when in fact it did it a lot...

---------- Post added at 06:56 PM ---------- Previous post was at 06:55 PM ----------

Quote:
Originally Posted by Mathew r Wright View Post
Very possible because I was trying to figure it out then I told myself to just listen so when I really started paying attention I herd like a flutter noise so got under there and seen I was missing a nut on each side and it did have a bank 2 lean code. So I went to lowes got some nuts and some lock tight and do believe I fixed it... It doesn't die when coming to a stop anymore when in fact it did it a lot...
Oh and not to mention I run 100 shot on it too so it's not been fun not being able to use it...
Mathew r Wright is offline   Reply With Quote
Old 01-05-2013, 07:16 PM   #5
Registered Member
Regular
 
96Roushgt's Avatar
 
Join Date: May 2012
Region: Ohio
Posts: 21
Quote:
Originally Posted by Mathew r Wright
Very possible because I was trying to figure it out then I told myself to just listen so when I really started paying attention I herd like a flutter noise so got under there and seen I was missing a nut on each side and it did have a bank 2 lean code. So I went to lowes got some nuts and some lock tight and do believe I fixed it... It doesn't die when coming to a stop anymore when in fact it did it a lot...

---------- Post added at 06:56 PM ---------- Previous post was at 06:55 PM ----------



Oh and not to mention I run 100 shot on it too so it's not been fun not being able to use it...
I got to lookin more and cylinder number 8 had coolent in the plug well where the COP goes in. I had to replace the intake alittle while ago due to the spout on the back breakin off and spewing everywhere. I'm thinking it fouled the plug????
96Roushgt is offline   Reply With Quote
Old 01-06-2013, 12:44 AM   #6
Registered Member
Regular
 
Mathew r Wright's Avatar
 
Join Date: Sep 2011
Region: Oklahoma
Posts: 470
Posibly? Motorcraft plugs are cheap so get some and I bet that helps. You don't know where exactly where it's missin???
Mathew r Wright is offline   Reply With Quote
Old 01-06-2013, 12:51 AM   #7
Registered Member
Regular
 
96Roushgt's Avatar
 
Join Date: May 2012
Region: Ohio
Posts: 21
Its Definatly in the back near the firewall. That's why I'm thinking it's that 8th cylinder.
96Roushgt is offline   Reply With Quote
Old 01-06-2013, 04:01 PM   #8
Registered Member
Regular
 
96Roushgt's Avatar
 
Join Date: May 2012
Region: Ohio
Posts: 21
Just put a new set of plugs in today. Helped just alittle bit but still has a misfire.
96Roushgt is offline   Reply With Quote
Old 01-06-2013, 05:58 PM   #9
Registered Member
Regular
 
Silver Pony's Avatar
 
Join Date: Jun 2012
Region: Texas
Posts: 319
Quote:
Originally Posted by 96Roushgt
I got to lookin more and cylinder number 8 had coolent in the plug well where the COP goes in. I had to replace the intake alittle while ago due to the spout on the back breakin off and spewing everywhere. I'm thinking it fouled the plug????
Had the same problem when I changed the intake on my 98. Change the plug or clean it real good and get some deelectric stuff and put some in the plug boot and on the end of the plug. It will keep it from fouling out in case there is some coolant left over. It will hold til it drys all the way out. I use deelectric every time I change my plugs anyways.
Silver Pony is offline   Reply With Quote
Old 01-06-2013, 06:58 PM   #10
Registered Member
Regular
 
1996mustang's Avatar
 
Join Date: Jun 2012
Location: Miami
Region: Florida
Posts: 1,013
Quote:
Originally Posted by 96Roushgt View Post
Its Definatly in the back near the firewall. That's why I'm thinking it's that 8th cylinder.
On the driver or passenger side? Never mind lol read more its number 4 if its by the heater core though
__________________
1996 Mustang GT, 17x9 front and 17x10.5 cobra r replica rims, 255/40/17 front 285/40/17 rear at the moment,
o/r x-pipe flow master 40 series dump downs, cai/ram intake, 75mm c&l throttle body and plenum, pi heads and intake swap, msd wires, stock gears, untuned at the moment, no dyno numbers for now.
1996mustang is offline   Reply With Quote
Old 01-06-2013, 07:03 PM   #11
Registered Member
Regular
 
Mathew r Wright's Avatar
 
Join Date: Sep 2011
Region: Oklahoma
Posts: 470
Quote:
Originally Posted by 96Roushgt View Post
It does have an exaust leak. Right at the flange where the intermediate pipe meets the manifold pipe. Couldn't line it up right when I replaced my clutch. Is it possible the exaust leak could make it run like that???
Needs to be fixed!!!
Mathew r Wright is offline   Reply With Quote
Old 01-06-2013, 07:22 PM   #12
Registered Member
Regular
 
96Roushgt's Avatar
 
Join Date: May 2012
Region: Ohio
Posts: 21
Ok wasn't sure the firing order on a 4.6 but I was just trying to get it running right before I go to basic. Still no luck on her.
96Roushgt is offline   Reply With Quote
Old 01-06-2013, 07:59 PM   #13
Registered Member
Regular
 
Mathew r Wright's Avatar
 
Join Date: Sep 2011
Region: Oklahoma
Posts: 470
Quote:
Originally Posted by Mathew r Wright View Post

Needs to be fixed!!!


---------- Post added at 07:59 PM ---------- Previous post was at 07:58 PM ----------

Quote:
Originally Posted by 96Roushgt View Post
It does have an exaust leak. Right at the flange where the intermediate pipe meets the manifold pipe. Couldn't line it up right when I replaced my clutch. Is it possible the exaust leak could make it run like that???
Needs to be fixed....
Mathew r Wright is offline   Reply With Quote
Old 01-09-2013, 12:05 PM   #14
Registered Member
Regular
 
96Roushgt's Avatar
 
Join Date: May 2012
Region: Ohio
Posts: 21
Just replaced the COP's today. Still running rough. Unplugged the down force sensor right before the intermediate pipe meets to see if it would reset the computer to run differently and got nothing. Any other suggestions? Maybe a dirty fuel filter?
96Roushgt is offline   Reply With Quote
Old 01-09-2013, 12:13 PM   #15
Registered Member
Regular
 
Mathew r Wright's Avatar
 
Join Date: Sep 2011
Region: Oklahoma
Posts: 470
Quote:
Originally Posted by 96Roushgt View Post
It does have an exaust leak. Right at the flange where the intermediate pipe meets the manifold pipe. Couldn't line it up right when I replaced my clutch. Is it possible the exaust leak could make it run like that???
Lol needs to be fixed...
Mathew r Wright is offline   Reply With Quote
Old 01-09-2013, 03:48 PM   #16
Lorraine's driver

Regular
 
ab_mach1's Avatar
 
Join Date: Feb 2012
Location: Indianapolis
Region: Indiana
Posts: 7,858
Yup, fix your exhaust leak. If its big enough, the O2 sensors may not read your exhaust correctly and cause the PCM to not tune the car right.
__________________
Instagram: @ab_mach1
ab_mach1 is offline   Reply With Quote
Old 01-10-2013, 11:17 AM   #17
Registered Member
Regular
 
Mathew r Wright's Avatar
 
Join Date: Sep 2011
Region: Oklahoma
Posts: 470
Quote:
Originally Posted by Azure View Post
Yup, fix your exhaust leak. If its big enough, the O2 sensors may not read your exhaust correctly and cause the PCM to not tune the car right.
That's why it's runnin roughly I'm tryin to tell ya. Well not tell but help...
Mathew r Wright is offline   Reply With Quote
Old 01-10-2013, 11:53 AM   #18
Registered Member
Regular
 
96Roushgt's Avatar
 
Join Date: May 2012
Region: Ohio
Posts: 21
I'll fix the flange and let you guys know what happens
96Roushgt is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT

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 On
Refbacks are Off


» Like Us On Facebook



03:23 AM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.