Cylinder three missfire. - Ford Mustang Forums : Mustang Forum
LinkBack Thread Tools Display Modes
post #1 of 2 Old 09-08-2013, 11:23 PM Thread Starter
Registered User
Trader Feedback: (0)
Join Date: Sep 2013
Location: Mississippi
Posts: 7
Cylinder three missfire.

Hey all,
My 02 GT 4.6 5 speed is giving me a few issues. Rough idle, sputtering through all rpms and substantial loss of power. Only addons are a magnaflow exhaust system with offroad H pipe, no cats and a cold air intake. CEL is on and it's pulling a missfire in cylinder 3 code. These are the things I've tried so far:
-moved around coils and injectors
-cleaned MAF, IAC, PCV and throttle body
-replaced alternator
-visually checked hoses for damage.

After doing all this, I reset the CEL each time only for it to return 20 or so miles later with the same code. When I was changing the plugs, I did notice some coolant in plug wells 7 and 8 but I'm not getting any codes for those cylinders. I inspected the intake manifold and didn't see any cracks in it but I know they're prone to cracking. I went ahead and ordered a new one from American Muscle and it should be in tomorrow. I have noticed a slight tapping on the passenger side under the engine. It's hard to explain but I can even here it when I'm driving underneath the passenger floorboard. I researched that and think it may be an exhaust leak? It looks like it's dripping water on the passenger side where the exhaust turns up to go towards the engine.
The only other thing I can think of is maybe a short in the engine harness that goes to cylinder 3 coil maybe? Just trying to exhaust my resources before I actually have to go into the motor and check out the cylinder. Any help is greatly appreciated!!

Birdhouse is offline  
Sponsored Links
post #2 of 2 Old 09-10-2013, 01:14 PM
Registered User
Decipha's Avatar
Trader Feedback: (0)
Join Date: Oct 2007
Location: New Orleans, LA
Posts: 1,037
could be that the rocker arm fell off, i've seen that numerous times

decipha @ EFIDynoTuning
Decipha is offline  
Sponsored Links


Quick Reply

Register Now

In order to be able to post messages on the Ford Mustang Forums : Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale Trick Flow Twisted Wedge Track Heat 185 Cylinder Heads for Small Block Ford(s) 58cc PowerAdder Solutions Windsor Engine Parts 28 05-08-2013 10:21 AM
Magical Disappearing Brakes - 1992 Mustang Lifted94XLT General Mustang Tech 84 03-03-2012 01:43 AM
Help Wanted! PLEASE Read. (BLOWER CAMS) MARK 302 Superchargers 53 02-24-2012 09:51 PM
Proposed Modular Shootout Renegade rules (very long!) Modular Performance GT & SOHC 30 12-19-2001 07:30 PM
Mod Shootout racers heres your chance to be heard Dave King GT & SOHC 237 12-19-2001 09:53 AM

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome