Misfire Issue After1997 GT Coolant Hose Failure; Need Help Solving - Mustang Evolution

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

Join Mustang Evolution Today


Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 07-24-2016, 08:01 PM   #1
Registered Member
Regular
 
TheJigShow's Avatar
 
Join Date: Mar 2011
Location: Glendora
Region: New Jersey
Posts: 262
Misfire Issue After1997 GT Coolant Hose Failure; Need Help Solving

A couple days ago the one heater hose on my 1997 Mustang GT starts on the passenger side of the intake manifold and goes right into the firewall) burst open, getting coolant basically everywhere. After replacing the hose and cleaning everything off, the car started up fine and even drove like new for about five minutes. From then on, it was misfiring horribly, making it barely able to move at all. The next day, the same thing: started and ran fine, only to misfire horribly after a few minutes and not go away.

Both times the code P0354 popped up, saying "Ignition Coil D Primary/Secondary Circuit Malfunction," so I went through the steps to not only blow out the spark plug valleys and clean everything, but I then replaced all 8 spark plugs, ignition wires, and both ignition coils. Fired it up, and it made no difference whatsoever; still misfiring horribly.

What do I do from here? I'm not sure where to go next, as I've replace all ignition parts (considering the engine code was for ignition). Any help would be hugely appreciated!!


"Jig"
2014 Ford Focus ST (ST3, Tuxedo Black Metallic)
1997 Ford Mustang GT (Rio Red)
__________________
"Jig"
2014 Ford Focus ST (ST3, Tuxedo Black Metallic)
1997 Ford Mustang GT (Rio Red) (RMR #7832)

2003 Ford Mustang GT Centennial Edition (Black) (SOLD)
2004 Ford Mustang GT (Redfire) (SOLD)
1985 Chevrolet C10 Custom Deluxe (Red) (SOLD)
TheJigShow is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 07-25-2016, 11:22 AM   #2
Registered Member
Regular
 
TheJigShow's Avatar
 
Join Date: Mar 2011
Location: Glendora
Region: New Jersey
Posts: 262
Bump


"Jig"
2014 Ford Focus ST (ST3, Tuxedo Black Metallic)
1997 Ford Mustang GT (Rio Red)
__________________
"Jig"
2014 Ford Focus ST (ST3, Tuxedo Black Metallic)
1997 Ford Mustang GT (Rio Red) (RMR #7832)

2003 Ford Mustang GT Centennial Edition (Black) (SOLD)
2004 Ford Mustang GT (Redfire) (SOLD)
1985 Chevrolet C10 Custom Deluxe (Red) (SOLD)
TheJigShow is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 07-25-2016, 01:33 PM   #3
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 6,830
It sounds like the number 4 coil has failed. That is the cylinder closest to the firewall, on the passenger side of the engine.
What likely happened is, the spark plug well filled with coolant and it shorted out the coil, which then overheated and failed.
straybullitt is offline   Reply With Quote
Old 07-25-2016, 01:54 PM   #4
Registered Member
Regular
 
TheJigShow's Avatar
 
Join Date: Mar 2011
Location: Glendora
Region: New Jersey
Posts: 262
Quote:
Originally Posted by straybullitt View Post
It sounds like the number 4 coil has failed. That is the cylinder closest to the firewall, on the passenger side of the engine.

What likely happened is, the spark plug well filled with coolant and it shorted out the coil, which then overheated and failed.

Since this started, I've cleaned & blown out the spark plug wells, replaced all 8 plugs, wires, and both ignition coils (in that order) and it didn't solve anything. There's no coolant leaks anymore and the car hasn't been out in the rain. So that's where I'm stuck 😐


"Jig"
2014 Ford Focus ST (ST3, Tuxedo Black Metallic)
1997 Ford Mustang GT (Rio Red)
__________________
"Jig"
2014 Ford Focus ST (ST3, Tuxedo Black Metallic)
1997 Ford Mustang GT (Rio Red) (RMR #7832)

2003 Ford Mustang GT Centennial Edition (Black) (SOLD)
2004 Ford Mustang GT (Redfire) (SOLD)
1985 Chevrolet C10 Custom Deluxe (Red) (SOLD)
TheJigShow is offline   Reply With Quote
Old 07-25-2016, 02:32 PM   #5
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 6,830
Sorry. Wasn't paying attention to the year of your car..

Hmmm. I suppose that you could try swapping the #4 fuel injector with #3 and see if you get a P0353 code. If that doesnt change anything, there could be a problem with the signal that the coil is recieving from the computer.
straybullitt is offline   Reply With Quote
Old 07-25-2016, 10:35 PM   #6
Registered Member
Regular
 
TheJigShow's Avatar
 
Join Date: Mar 2011
Location: Glendora
Region: New Jersey
Posts: 262
Quote:
Originally Posted by straybullitt View Post
Sorry. Wasn't paying attention to the year of your car..



Hmmm. I suppose that you could try swapping the #4 fuel injector with #3 and see if you get a P0353 code. If that doesnt change anything, there could be a problem with the signal that the coil is recieving from the computer.

I'll give that a shot when I get the chance. If it's not the injector, how do I deal with the computer to coil signal problem?


"Jig"
2014 Ford Focus ST (ST3, Tuxedo Black Metallic)
1997 Ford Mustang GT (Rio Red)
__________________
"Jig"
2014 Ford Focus ST (ST3, Tuxedo Black Metallic)
1997 Ford Mustang GT (Rio Red) (RMR #7832)

2003 Ford Mustang GT Centennial Edition (Black) (SOLD)
2004 Ford Mustang GT (Redfire) (SOLD)
1985 Chevrolet C10 Custom Deluxe (Red) (SOLD)
TheJigShow is offline   Reply With Quote
Old 07-26-2016, 11:31 AM   #7
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 6,830
Since the coolant sprayed everywhere, you might start with checking all of the electrical connections related to the ignition system and the PCM. Make sure that everything is dry and corrosion free.
straybullitt is offline   Reply With Quote
Old 07-29-2016, 08:50 AM   #8
Registered Member
Regular
 
TheJigShow's Avatar
 
Join Date: Mar 2011
Location: Glendora
Region: New Jersey
Posts: 262
SOLVED!! Turns out the plug to the driver side ignition coil was being pulled too tight so it strained the one side of it, causing it to act funny. It threw the P0354 code, but after hooking up the scanner, the graph should cylinders 2 & 8 acting funky, which was coming from that coil. I gave the wires some slack and made sure everything was good and the car has been purring since 😁


"Jig"
2014 Ford Focus ST (ST3, Tuxedo Black Metallic)
1997 Ford Mustang GT (Rio Red)
__________________
"Jig"
2014 Ford Focus ST (ST3, Tuxedo Black Metallic)
1997 Ford Mustang GT (Rio Red) (RMR #7832)

2003 Ford Mustang GT Centennial Edition (Black) (SOLD)
2004 Ford Mustang GT (Redfire) (SOLD)
1985 Chevrolet C10 Custom Deluxe (Red) (SOLD)
TheJigShow is offline   Reply With Quote
Sponsored Links
Advertisement
 
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
thought my gt was on fire but a certain coolant hose blew out gt_nez 1996-2004 Mustang GT 17 03-09-2015 12:40 AM
07 V6 Lower Coolant Hose Issues AJShiftSoerens 2005-2010 V6 Mustang 1 12-30-2014 05:54 AM
Coolant hose 2013 Jmusc16 2011-2014 V6 Mustang 1 04-12-2013 07:18 PM
Track tonight solving grudges 04machazblue 1996-2004 Mustang GT 43 06-18-2011 01:17 PM
what coolant hose is this? jimmy_beaner 1996-2004 Mustang GT 53 02-14-2009 11:13 PM

» Like Us On Facebook



11:19 AM


Powered by vBulletin® Version 3.8.8 Beta 1
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.