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96-96/99-04 4.6 Plug Wire Interchange

  • Thread starter Thread starter S22C11
  • Start date Start date Feb 28, 2006
S

S22C11

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Feb 28, 2006
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  • Feb 28, 2006
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What's up ya'll, I've got a slight problem and need some help from the experts. I've got a 2003 Mustang GT, and I recently bought on ebay a new set of 9MM plug wires (brand is Ford Motorsports), what I didn't realize is that they are supposedly for the 96-98 GT. Can I still use these in my 03? Also I bought NKG55 spark plugs, are these a good plug to use?
 
S

S22C11

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Feb 28, 2006
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#2
  • Feb 28, 2006
  • #2
Sorry in the title I meant to put 96-98
 

CanadaStang

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Feb 28, 2006
#3
  • Feb 28, 2006
  • #3
S22C11 said:
What's up ya'll, I've got a slight problem and need some help from the experts. I've got a 2003 Mustang GT, and I recently bought on ebay a new set of 9MM plug wires (brand is Ford Motorsports), what I didn't realize is that they are supposedly for the 96-98 GT. Can I still use these in my 03?
Click to expand...
No
 

Nater

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Sep 5, 2003
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Feb 28, 2006
#4
  • Feb 28, 2006
  • #4
CanadaStang said:
No
Click to expand...

+1
 
K

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
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Feb 28, 2006
#5
  • Feb 28, 2006
  • #5
Dude, have you looked under your hood? Your 2003 Mustang GT does not have plug wires.
 

CanadaStang

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#6
  • Feb 28, 2006
  • #6
S22C11 said:
Also I bought NKG55 spark plugs, are these a good plug to use?
Click to expand...
The NGK TR-55's will be fine.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
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Feb 28, 2006
#7
  • Feb 28, 2006
  • #7
S22C11 said:
Can I still use these in my 03? Also I bought NKG55 spark plugs, are these a good plug to use?
Click to expand...


99+ Mustangs use Coil-on-Plug technology. There are no plug wires at all. An individual coil sits over each plug.

As for the plugs, I'd stick with motorcraft plugs. They work well in the Mustang and unless you have high miles there is no reason to risk stripping a plug hole to change them out.
 

COramprat

...I can take it. I think.
20+ Year Stangneter
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Feb 28, 2006
#8
  • Feb 28, 2006
  • #8
I'll buy the wires from you for 20 bucks...
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
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Feb 28, 2006
#9
  • Feb 28, 2006
  • #9
well somebody will be able to get a nice new set of wires dirt cheap.
 
S

S22C11

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#10
  • Feb 28, 2006
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I realize the new technology, but its things like this that makes me wonder... http://cgi.ebay.com/ebaymotors/ws/e...=8020701296&rd=1&sspagename=STRK:MEWA:IT&rd=1
 

stangGT97

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Dec 22, 2004
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Mar 1, 2006
#11
  • Mar 1, 2006
  • #11
S22C11 said:
I realize the new technology, but its things like this that makes me wonder... http://cgi.ebay.com/ebaymotors/ws/e...=8020701296&rd=1&sspagename=STRK:MEWA:IT&rd=1
Click to expand...

yeah theyre retarded... you dont have plug wires
 

tonys5.0

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Jacksonville, FL
Mar 1, 2006
#12
  • Mar 1, 2006
  • #12
They work well in the Mustang and unless you have high miles there is no reason to risk stripping a plug hole to change them out.
Click to expand...


Forgive me if I'm missing something here but how easy is it to strip a plug hole on a 2003 mustang?
I have an '04 and was considering changing my plugs soon due to a couple of past misfires. I've always changed my own plugs on past cars including my late '87 5.0. Is there something I should know about changing plugs on a modular engine?
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
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Mar 1, 2006
#13
  • Mar 1, 2006
  • #13
tonys5.0 said:
Forgive me if I'm missing something here but how easy is it to strip a plug hole on a 2003 mustang?
I have an '04 and was considering changing my plugs soon due to a couple of past misfires. I've always changed my own plugs on past cars including my late '87 5.0. Is there something I should know about changing plugs on a modular engine?
Click to expand...

no it's easy to change the plugs on your 04 in fact it's easier than the plugs n a 5.0

all you do is remove the coils ( under the fuel rail) and the plugs are down the wells. when you put them in put a dab of anti seize on them and torque em down to 13 ft/lb

the only thing to keep in mind about 4.6 plugs is they tend to back out. even the factory ones installed at the assembly line have loosened up. when this happens the plug vibrating will strip the threads off the cylinder head causing the plug to blow out.

So just to be safe check your plugs and retorque them every couple of oil changes or so.
 

Gearbanger 101

Straight Outta Locash
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#14
  • Mar 1, 2006
  • #14
coramprat said:
I'll buy the wires from you for 20 bucks...
Click to expand...
hahaha....jerk
 
K

Kilgore Trout

Fried or Broiled ?
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#15
  • Mar 1, 2006
  • #15
One other tip I would offer about plug change is to clean the rubber COP boots and condition them with 303 Aerospace Protectant. This will ensure a good seal and prevent water from getting in your plug wells. Also, blow out the wells THOROUGHLY before removing plug to remove debris.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,235
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Massachusetts
Mar 1, 2006
#16
  • Mar 1, 2006
  • #16
tonys5.0 said:
Forgive me if I'm missing something here but how easy is it to strip a plug hole on a 2003 mustang?
I have an '04 and was considering changing my plugs soon due to a couple of past misfires. I've always changed my own plugs on past cars including my late '87 5.0. Is there something I should know about changing plugs on a modular engine?
Click to expand...


The mod motor is very easy to do plugs on, it's just that Ford and their lovely engineering team poorly designed the spark plug bung. As a result, many vehicles including the Mustang with the 4.6L tend to shoot plugs out of their heads from time to time. The head is soft aluminum and ford didn't put enough threads so if installed too tightly, you can actually strip the plug hole. Then you are required to either heli-coil or buy a new head.

Just be sure to not overtorque the plugs when you install them
 
S

S22C11

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Feb 28, 2006
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Mar 2, 2006
#17
  • Mar 2, 2006
  • #17
Thanks for the help guys.
 
S

S22C11

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#18
  • Mar 2, 2006
  • #18
Do you have to remove the fuel rail to get the plugs out?
 
K

Kilgore Trout

Fried or Broiled ?
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#19
  • Mar 2, 2006
  • #19
S22C11 said:
Do you have to remove the fuel rail to get the plugs out?
Click to expand...
No
 
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