99 Mustang GT (Spark plugs, wires & Coil pack)

joey0976 · July 10th, 2006, 03:00 PM

I purchased the Autolite spark plugs that need to be capped at 0.54" & also purchased the Ford Racing 9mm Spark Plug wires. I was told that I can't use the stock Coil pack with what I just purchased so I need help. What kind of Coil Pack do I need to purchase & how much do they run. I heard something about a screaming deamon coil pack but don't know if that would be compatible with what I bought. I'm not even sure if my Autolite spark plugs are compatible with the 9mm Ford Racing Wires. HELP ME PLEASE.

ChrisJ · July 10th, 2006, 03:21 PM

from what I have heard coil packs are a worthless mod...

You should not have spark plug wires...

joey0976 · July 10th, 2006, 03:33 PM

Not sure what you mean by I should not have spark plug wires. My car hasn't had a tune since I bought it. Are you saying I should return what I bought?

White99stang · July 10th, 2006, 03:52 PM

here is the deal, 99-up cars do not have spark plug wires, the have coil on plug, look at the motor and you should see 8 black circles over each cylinder right next to the injectors. those go ontop of the plugs which are down in the head. So all you need to change is the plugs, the coil on plugs don't need to be changed unless they go bad. which they almost never do, the screamin coil packs are for 96-98 mustangs that actually have plug wires. So return the plug wires and just change your plugs. And make sure you change the plugs with the motor cold, and use antisieze cause aluminum heads like to strip out.

White99stang · July 10th, 2006, 03:58 PM

these are what the coil on plugs look like except all black, you do not need to waste your money on new ones or aftermarket ones, they are expensive as hell also.

Casper98GT · July 10th, 2006, 08:36 PM

And make sure you change the plugs with the motor cold, and use antisieze cause aluminum heads like to strip out.

Good call.... i cant tell you how many heads i have replaced....

ChrisJ · July 11th, 2006, 02:37 PM

Originally Posted by Casper98GT

And make sure you change the plugs with the motor cold, and use antisieze cause aluminum heads like to strip out.

Good call.... i cant tell you how many heads i have replaced....

That really good to know info...I have seen quite a few of these heads come throught eh local dealership with the threads missing...

Casper98GT · July 11th, 2006, 06:38 PM

haha, yup. And i can tell you "helicoil"..... doesnt work. hahahaha. They think there smart having us remove the heads for them so their "buddy" can helicoil them because we wont do it...... then months later they come back asking us for price on heads and they take the hit to the wallet all over again.

mustang_montana · July 12th, 2006, 11:36 AM

oh man ive changed my plugs at least a handful of times when the car was still hot. hope i didnt mess up the threads already, but if so....them heads are gonna be ported if they ever come off. as for original poster, if you really want coil packs ill trade wiring harnesses and computers with you, id love to convert to cop.

joey0976 · July 14th, 2006, 01:53 PM

Thank you guys for all of the replies about this. I'm going to contact the place I ordered the wires from & see what I can do to return them. Ended up spending $82 on those things & didn't know my car didn't need Spark Plug wires. Does this mean that all GT's 99-up have a sequential electronic fuel injection Engine Management System? I have a 99 35th Anniversary Limited Edition GT & that's what they said I have in my car.

Also, does anyone know where I can get good illustrations on how to change my spark plugs? I'm a visual type of person but if you don't have illustrations I will take instructions as this is my first time doing this.

Black99GT53 · July 18th, 2006, 11:03 AM

lol the heads like to strip out even when antiseize is used lol, closest cylinder to the firewall on the drivers side partially stripped on me even when i used it

ChrisJ · July 18th, 2006, 08:07 PM

Originally Posted by Casper98GT

haha, yup. And i can tell you "helicoil"..... doesnt work. hahahaha. They think there smart having us remove the heads for them so their "buddy" can helicoil them because we wont do it...... then months later they come back asking us for price on heads and they take the hit to the wallet all over again.

Oh you guys get "those guys" too...HAHAHAHAHAHA...I think it is funny...

Casper98GT · July 18th, 2006, 08:11 PM

haha, yup. I dont care either way though, cause im still geting paid to remove the head and install... customer pay

ChrisJ · July 18th, 2006, 08:13 PM

Originally Posted by Casper98GT

haha, yup. I dont care either way though, cause im still geting paid to remove the head and install... customer pay

It can end in some nice "side work" though...

Casper98GT · July 18th, 2006, 09:14 PM

There is no side work i wanna be doing on a F-series superduty. They are pieces of crap, just like everything else ford makes... minus the mustang.

ChrisJ · July 18th, 2006, 09:18 PM

Originally Posted by Casper98GT

There is no side work i wanna be doing on a F-series superduty. They are pieces of crap, just like everything else ford makes... minus the mustang.

Or how about longtubes on a "new edge"?

Casper98GT · July 18th, 2006, 09:37 PM

Long tubes on a 05ish, or a 04ish ? By new edge im guessing you mean 99-04. So yeah it sucks a huge hog. 05+ arent too bad, and the oil pans isnt either.

ChrisJ · July 18th, 2006, 10:13 PM

Originally Posted by Casper98GT

Long tubes on a 05ish, or a 04ish ? By new edge im guessing you mean 99-04. So yeah it sucks a huge hog. 05+ arent too bad, and the oil pans isnt either.

Yeah I heard someone call the 99-04 New Edge...Ever since I refer to them as that...Yeah first set I did not take the k-member out...Everyone after that I did...

July 10th, 2006, 03:00 PM	#1
joey0976 Newbie Join Date: Jul 2006 Posts: 3 iTrader: 0 reviews	99 Mustang GT (Spark plugs, wires & Coil pack) I purchased the Autolite spark plugs that need to be capped at 0.54" & also purchased the Ford Racing 9mm Spark Plug wires. I was told that I can't use the stock Coil pack with what I just purchased so I need help. What kind of Coil Pack do I need to purchase & how much do they run. I heard something about a screaming deamon coil pack but don't know if that would be compatible with what I bought. I'm not even sure if my Autolite spark plugs are compatible with the 9mm Ford Racing Wires. HELP ME PLEASE.

July 10th, 2006, 03:21 PM	#2
ChrisJ RLY SRS Join Date: Aug 2005 Location: Ft. Meade, MD Posts: 38,220 Blog Entries: 4 iTrader: 10 reviews	from what I have heard coil packs are a worthless mod... You should not have spark plug wires... __________________ 2008 Acura TL Type-S - 2008 EB Ford Expedition - 2002 Boosted GT - Sold Facebook Google+

July 10th, 2006, 03:52 PM	#4
White99stang MM's nicest mod, :) Join Date: Aug 2005 Location: Apex, NC Posts: 3,771 iTrader: 0 reviews	here is the deal, 99-up cars do not have spark plug wires, the have coil on plug, look at the motor and you should see 8 black circles over each cylinder right next to the injectors. those go ontop of the plugs which are down in the head. So all you need to change is the plugs, the coil on plugs don't need to be changed unless they go bad. which they almost never do, the screamin coil packs are for 96-98 mustangs that actually have plug wires. So return the plug wires and just change your plugs. And make sure you change the plugs with the motor cold, and use antisieze cause aluminum heads like to strip out. __________________ 06 Dodge MegaCab Diesel 455rwhp/815rwtq REAL TRUCKS DON'T USE SPARK PLUGS

July 11th, 2006, 06:38 PM	#8
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	haha, yup. And i can tell you "helicoil"..... doesnt work. hahahaha. They think there smart having us remove the heads for them so their "buddy" can helicoil them because we wont do it...... then months later they come back asking us for price on heads and they take the hit to the wallet all over again. __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

July 12th, 2006, 11:36 AM	#9
mustang_montana Regular Join Date: Apr 2006 Posts: 88 iTrader: 0 reviews	oh man ive changed my plugs at least a handful of times when the car was still hot. hope i didnt mess up the threads already, but if so....them heads are gonna be ported if they ever come off. as for original poster, if you really want coil packs ill trade wiring harnesses and computers with you, id love to convert to cop. __________________

July 10th, 2006, 03:33 PM	#3
joey0976 Newbie Join Date: Jul 2006 Posts: 3 iTrader: 0 reviews	Not sure what you mean by I should not have spark plug wires. My car hasn't had a tune since I bought it. Are you saying I should return what I bought?

July 14th, 2006, 01:53 PM	#10
joey0976 Newbie Join Date: Jul 2006 Posts: 3 iTrader: 0 reviews	Thank you guys for all of the replies about this. I'm going to contact the place I ordered the wires from & see what I can do to return them. Ended up spending $82 on those things & didn't know my car didn't need Spark Plug wires. Does this mean that all GT's 99-up have a sequential electronic fuel injection Engine Management System? I have a 99 35th Anniversary Limited Edition GT & that's what they said I have in my car. Also, does anyone know where I can get good illustrations on how to change my spark plugs? I'm a visual type of person but if you don't have illustrations I will take instructions as this is my first time doing this.

July 18th, 2006, 11:03 AM	#11
Black99GT53 Newbie Join Date: Jul 2006 Posts: 6 iTrader: 0 reviews	lol the heads like to strip out even when antiseize is used lol, closest cylinder to the firewall on the drivers side partially stripped on me even when i used it

July 18th, 2006, 08:11 PM	#13
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	haha, yup. I dont care either way though, cause im still geting paid to remove the head and install... customer pay __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

July 18th, 2006, 09:14 PM	#15
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	There is no side work i wanna be doing on a F-series superduty. They are pieces of crap, just like everything else ford makes... minus the mustang. __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

July 18th, 2006, 09:37 PM	#17
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	Long tubes on a 05ish, or a 04ish ? By new edge im guessing you mean 99-04. So yeah it sucks a huge hog. 05+ arent too bad, and the oil pans isnt either. __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

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