When should you replace coil packs

energiesource · July 6th, 2008, 02:15 PM

I'm sure as hell not about to spend $520 on new coil packs when i dont need to.
so when should you replace them, if you even do?
there are some accel ones for $30 a piece but still pricey.

HMUSN · July 6th, 2008, 02:17 PM

when they break.
no need to upgrade.

energiesource · July 6th, 2008, 02:18 PM

well how do i know when theyre 'broken' or do you mean like physically break?
btw how do i get to my spart plugs without taking the fuel rail off.

HMUSN · July 6th, 2008, 02:20 PM

your car would not fire in that cylinder. you would know if a coil pack was bad.
as far as the fuel rail you just have to play with it a little and they will come out.
I never took my fuel rail off when changing my plugs in my 01 GT

energiesource · July 6th, 2008, 02:25 PM

yeah but arent they directly under the rail, which means you cant get at them?

HMUSN · July 6th, 2008, 02:28 PM

you can get to them without removing the fuel rail. it's just easier to remove the fuel rail for some people.

energiesource · July 6th, 2008, 02:30 PM

ah, ill have to try that then. is there a 'how-to' somewhere?

HMUSN · July 6th, 2008, 02:32 PM

start at step 13

Ford Mustang: Mustang Tech: Maintenance and Tune Up: 99+ Sparkplug installation

energiesource · July 6th, 2008, 02:40 PM

and i gap them between 1.32 mm and 1.42 mm?

HMUSN · July 6th, 2008, 02:40 PM

.054 or whatever the conversion comes out to in mm

HMUSN · July 6th, 2008, 02:42 PM

comes out to around 1.3716 mm

energiesource · July 6th, 2008, 02:45 PM

yeah 0.052 to 0.056 in
thanks

HMUSN · July 6th, 2008, 02:52 PM

energiesource · July 6th, 2008, 03:01 PM

bahaha

KhaosGT · July 6th, 2008, 03:14 PM

i removed the fuel rail before i did mine just make sure to bleed the pressure off first or it makes a big mess

9Sec03Cobra · July 6th, 2008, 04:56 PM

Absolutely no reason to pull the rails. Just take out the bolts, twist the coil a little and it will pop right out of there.

energiesource · July 6th, 2008, 05:00 PM

correct me if im wrong, but if you get a 9.5 second quarter mile, shouldnt you be going faster than 146?

9Sec03Cobra · July 6th, 2008, 05:51 PM

Originally Posted by energiesource

correct me if im wrong, but if you get a 9.5 second quarter mile, shouldnt you be going faster than 146?

Not necessarily , I have run 9.7's in the 130's and even ran some 10.0's at 140+. There are alot of factors such as weight and wheelspin, etc.

That was with a loose converter on a maiden voyage with a new setup.

9Sec03Cobra · July 6th, 2008, 06:03 PM

Here is a link to the video for you if you would like to see it

Sean Kelly 03 Cobra 959 - Putfile.com

RyanGT · July 6th, 2008, 07:13 PM

Your car will throw a code that even says what cylinder is out, there will be a primary circuit failure or whatnot.

And swivel sockets are your friend, dont remove the fuel rail. Just make sure you thread the plugs in by hand (without the ratchet) to make sure you dont cross thread.

July 6th, 2008, 02:15 PM	#1
energiesource Hardcore Enthusiast Join Date: Oct 2006 Location: Up der in canada eh Posts: 2,672	When should you replace coil packs I'm sure as hell not about to spend $520 on new coil packs when i dont need to. so when should you replace them, if you even do? there are some accel ones for $30 a piece but still pricey. __________________ 2000 Mustang GT, Steeda Triax shifter, Underdrive pulleys, SLP LM2, MAC L/T and O/R H-pipe. Transmission fix, new clutch Coming soon: Brakes.

July 6th, 2008, 02:18 PM	#3
energiesource Hardcore Enthusiast Join Date: Oct 2006 Location: Up der in canada eh Posts: 2,672	well how do i know when theyre 'broken' or do you mean like physically break? btw how do i get to my spart plugs without taking the fuel rail off. __________________ 2000 Mustang GT, Steeda Triax shifter, Underdrive pulleys, SLP LM2, MAC L/T and O/R H-pipe. Transmission fix, new clutch Coming soon: Brakes.

July 6th, 2008, 02:25 PM	#5
energiesource Hardcore Enthusiast Join Date: Oct 2006 Location: Up der in canada eh Posts: 2,672	yeah but arent they directly under the rail, which means you cant get at them? __________________ 2000 Mustang GT, Steeda Triax shifter, Underdrive pulleys, SLP LM2, MAC L/T and O/R H-pipe. Transmission fix, new clutch Coming soon: Brakes.

July 6th, 2008, 02:30 PM	#7
energiesource Hardcore Enthusiast Join Date: Oct 2006 Location: Up der in canada eh Posts: 2,672	ah, ill have to try that then. is there a 'how-to' somewhere? __________________ 2000 Mustang GT, Steeda Triax shifter, Underdrive pulleys, SLP LM2, MAC L/T and O/R H-pipe. Transmission fix, new clutch Coming soon: Brakes.

July 6th, 2008, 02:40 PM	#9
energiesource Hardcore Enthusiast Join Date: Oct 2006 Location: Up der in canada eh Posts: 2,672	and i gap them between 1.32 mm and 1.42 mm? __________________ 2000 Mustang GT, Steeda Triax shifter, Underdrive pulleys, SLP LM2, MAC L/T and O/R H-pipe. Transmission fix, new clutch Coming soon: Brakes.

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July 6th, 2008, 02:17 PM	#2
HMUSN Doc 91 Sonic Blue Goodness 19.83 @ 12mph Join Date: Nov 2006 Location: NJ Posts: 27,308	when they break. no need to upgrade.

July 6th, 2008, 02:20 PM	#4
HMUSN Doc 91 Sonic Blue Goodness 19.83 @ 12mph Join Date: Nov 2006 Location: NJ Posts: 27,308	your car would not fire in that cylinder. you would know if a coil pack was bad. as far as the fuel rail you just have to play with it a little and they will come out. I never took my fuel rail off when changing my plugs in my 01 GT

July 6th, 2008, 02:28 PM	#6
HMUSN Doc 91 Sonic Blue Goodness 19.83 @ 12mph Join Date: Nov 2006 Location: NJ Posts: 27,308	you can get to them without removing the fuel rail. it's just easier to remove the fuel rail for some people.

July 6th, 2008, 02:32 PM	#8
HMUSN Doc 91 Sonic Blue Goodness 19.83 @ 12mph Join Date: Nov 2006 Location: NJ Posts: 27,308	start at step 13 Ford Mustang: Mustang Tech: Maintenance and Tune Up: 99+ Sparkplug installation

July 6th, 2008, 02:42 PM	#11
HMUSN Doc 91 Sonic Blue Goodness 19.83 @ 12mph Join Date: Nov 2006 Location: NJ Posts: 27,308	comes out to around 1.3716 mm

July 6th, 2008, 02:45 PM	#12
energiesource Hardcore Enthusiast Join Date: Oct 2006 Location: Up der in canada eh Posts: 2,672	yeah 0.052 to 0.056 in thanks __________________ 2000 Mustang GT, Steeda Triax shifter, Underdrive pulleys, SLP LM2, MAC L/T and O/R H-pipe. Transmission fix, new clutch Coming soon: Brakes.

July 6th, 2008, 02:52 PM	#13
HMUSN Doc 91 Sonic Blue Goodness 19.83 @ 12mph Join Date: Nov 2006 Location: NJ Posts: 27,308

July 6th, 2008, 03:01 PM	#14
energiesource Hardcore Enthusiast Join Date: Oct 2006 Location: Up der in canada eh Posts: 2,672	bahaha __________________ 2000 Mustang GT, Steeda Triax shifter, Underdrive pulleys, SLP LM2, MAC L/T and O/R H-pipe. Transmission fix, new clutch Coming soon: Brakes.

July 6th, 2008, 03:14 PM	#15
KhaosGT Enthusiast 2004 Mustang GT Join Date: Jan 2007 Location: Fort Worth, TX Posts: 819	i removed the fuel rail before i did mine just make sure to bleed the pressure off first or it makes a big mess __________________ 2004 Black Mustang Gt "I'm a agent of chaos" -Joker,Dark Knight

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July 6th, 2008, 04:56 PM	#16
9Sec03Cobra Regular Join Date: Aug 2005 Location: Virginia Beach Va Posts: 169	Absolutely no reason to pull the rails. Just take out the bolts, twist the coil a little and it will pop right out of there. __________________ 2003 Cobra 9.5 @ 146 on radials Just a few bolt ons with a good tune 04 Mach1 9.78 @ 138.9

July 6th, 2008, 05:00 PM	#17
energiesource Hardcore Enthusiast Join Date: Oct 2006 Location: Up der in canada eh Posts: 2,672	correct me if im wrong, but if you get a 9.5 second quarter mile, shouldnt you be going faster than 146? __________________ 2000 Mustang GT, Steeda Triax shifter, Underdrive pulleys, SLP LM2, MAC L/T and O/R H-pipe. Transmission fix, new clutch Coming soon: Brakes.

July 6th, 2008, 07:13 PM	#20
RyanGT Hardcore Enthusiast 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 1,200	Your car will throw a code that even says what cylinder is out, there will be a primary circuit failure or whatnot. And swivel sockets are your friend, dont remove the fuel rail. Just make sure you thread the plugs in by hand (without the ratchet) to make sure you dont cross thread. __________________ 2000 Black convertible GT: KB 14psi, and other goodies...