2001 3.8 V6 Mustang Will Not Start * Need Help Bad *

Juggalo_X · January 16th, 2008, 11:06 AM

Originally Posted by GreenFaleen

did he replace the right coil? also coils can be bad out of the box

this is true but for both of them to have the exact same symptoms is very unlikely.

GreenFaleen · January 16th, 2008, 11:19 AM

true but if it was the harness no places would have spark

Juggalo_X · January 16th, 2008, 11:21 AM

Originally Posted by GreenFaleen

true but if it was the harness no places would have spark

No the wire is 1 vcc (red/green) and 3 ground. each set of secondaries has its own ground. at least from what i can tell from the schematic and reading my repair manual. the red/green is vcc (+) and they other 3 are ground (-) so in theory an open ground could cause this symptom.

GreenFaleen · January 16th, 2008, 11:27 AM

well they are looped so one bad ground means no spark

Juggalo_X · January 16th, 2008, 11:36 AM

ok here is how it goes.

Red/LT Green = VCC (+)

Tan/Orange = Ground to pcm

Tan/WHite = Ground to pcm

Tan/LT Green = Ground to pcm

the pcm alternates the ground according to the cyl # its firing. so it closes one ground and opens the other two. sounds to me its wiring to pcm or pcm.

Juggalo_X · January 16th, 2008, 11:39 AM

Originally Posted by Juggalo_X

ok here is how it goes.

Red/LT Green = VCC (+)

Tan/Orange = Ground to pcm (-)

Tan/WHite = Ground to pcm (-)

Tan/LT Green = Ground to pcm (-)

the pcm alternates the ground according to the cyl # its firing. so it closes one ground and opens the other two. sounds to me its wiring to pcm or pcm.

i wanna add to this and this is weird. the manual says exactly what i stated above. about the polarities and i have tested these they are true.

i just would have thought they all would have a common ground (Red/LT Green) and alternating VCC

GreenFaleen · January 16th, 2008, 12:14 PM

I still say the second coil he got was bad

Juggalo_X · January 16th, 2008, 12:18 PM

Originally Posted by GreenFaleen

I still say the second coil he got was bad

well testing wiring is free. it is possible the coil was bad but go with the free method first IMO

GreenFaleen · January 16th, 2008, 12:23 PM

so is testing a coil if you have an ohm meter

Juggalo_X · January 16th, 2008, 12:32 PM

Originally Posted by GreenFaleen

so is testing a coil if you have an ohm meter

ive already told him to test the coil and harness

94v6blkndred · January 16th, 2008, 01:47 PM

Originally Posted by Juggalo_X

ok here is how it goes.

Red/LT Green = VCC (+)

Tan/Orange = Ground to pcm

Tan/WHite = Ground to pcm

Tan/LT Green = Ground to pcm

the pcm alternates the ground according to the cyl # its firing. so it closes one ground and opens the other two. sounds to me its wiring to pcm or pcm.

thats what i said i thought it was..maybe the computer is screwy

GreenFaleen · January 16th, 2008, 02:23 PM

if it is the pcm going wacky hes gonna have a lot of other weird quirks

94v6blkndred · January 16th, 2008, 03:02 PM

when my PC went dumb it only affected my number 6 injector and thats it

Juggalo_X · January 16th, 2008, 03:49 PM

Originally Posted by 94v6blkndred

when my PC went dumb it only affected my number 6 injector and thats it

Was visiting my buddy at ford. he has a Explorer 5.4 right now with COP and the #8 cyl keeps miss firing. its a pcm issue. they have replaced the Injector, COP and plugs. same result. so it is quite possible to only have a single component effected by a bad PCM

94v6blkndred · January 16th, 2008, 08:17 PM

holy hell...so your saying..i may have given correct advice for the first time!!!?

hahaha

dgt_mustang · January 17th, 2008, 08:58 PM

im having the same problem as this guy with an 02 mustang, havent replaced the coil pack yet, YET!!, but what was the outcome of his car? i havent seen him repost anything yet.

stephen · January 18th, 2008, 11:32 AM

I would definately at least check the resistance of the crank angle sensor in this situation.

January 16th, 2008, 11:19 AM	#22
GreenFaleen MM's Resident Ricer 2006 Scion tC 13.001@113 Join Date: Nov 2006 Location: Raleigh/Lenoir, NC Posts: 9,880 Blog Entries: 2 iTrader: 1 reviews	true but if it was the harness no places would have spark __________________ Scion Tc Turbo - 9psi 297whp 287wtq 2500lbs :p MM 4 Banger club: Senior Ricer NCMM #9 "Horsepower sells cars, torque wins races." -Carroll Shelby

January 16th, 2008, 11:27 AM	#24
GreenFaleen MM's Resident Ricer 2006 Scion tC 13.001@113 Join Date: Nov 2006 Location: Raleigh/Lenoir, NC Posts: 9,880 Blog Entries: 2 iTrader: 1 reviews	well they are looped so one bad ground means no spark __________________ Scion Tc Turbo - 9psi 297whp 287wtq 2500lbs :p MM 4 Banger club: Senior Ricer NCMM #9 "Horsepower sells cars, torque wins races." -Carroll Shelby

January 16th, 2008, 12:14 PM	#27
GreenFaleen MM's Resident Ricer 2006 Scion tC 13.001@113 Join Date: Nov 2006 Location: Raleigh/Lenoir, NC Posts: 9,880 Blog Entries: 2 iTrader: 1 reviews	I still say the second coil he got was bad __________________ Scion Tc Turbo - 9psi 297whp 287wtq 2500lbs :p MM 4 Banger club: Senior Ricer NCMM #9 "Horsepower sells cars, torque wins races." -Carroll Shelby

January 16th, 2008, 12:23 PM	#29
GreenFaleen MM's Resident Ricer 2006 Scion tC 13.001@113 Join Date: Nov 2006 Location: Raleigh/Lenoir, NC Posts: 9,880 Blog Entries: 2 iTrader: 1 reviews	so is testing a coil if you have an ohm meter __________________ Scion Tc Turbo - 9psi 297whp 287wtq 2500lbs :p MM 4 Banger club: Senior Ricer NCMM #9 "Horsepower sells cars, torque wins races." -Carroll Shelby

January 16th, 2008, 02:23 PM	#32
GreenFaleen MM's Resident Ricer 2006 Scion tC 13.001@113 Join Date: Nov 2006 Location: Raleigh/Lenoir, NC Posts: 9,880 Blog Entries: 2 iTrader: 1 reviews	if it is the pcm going wacky hes gonna have a lot of other weird quirks __________________ Scion Tc Turbo - 9psi 297whp 287wtq 2500lbs :p MM 4 Banger club: Senior Ricer NCMM #9 "Horsepower sells cars, torque wins races." -Carroll Shelby

January 16th, 2008, 11:36 AM	#25
Juggalo_X I Post Entirely Way Too Much 2001 Mustang 232/CBR600 14+@Slow Join Date: Jan 2007 Location: South Western Ontario Posts: 6,688 iTrader: 0 reviews	ok here is how it goes. Red/LT Green = VCC (+) Tan/Orange = Ground to pcm Tan/WHite = Ground to pcm Tan/LT Green = Ground to pcm the pcm alternates the ground according to the cyl # its firing. so it closes one ground and opens the other two. sounds to me its wiring to pcm or pcm.

January 16th, 2008, 03:02 PM	#33
94v6blkndred Hardcore Enthusiast 02 Turboed Saleen Clone faster than my v6 Join Date: Mar 2007 Location: Houston, TX Posts: 1,604 iTrader: 0 reviews	when my PC went dumb it only affected my number 6 injector and thats it

January 16th, 2008, 08:17 PM	#35
94v6blkndred Hardcore Enthusiast 02 Turboed Saleen Clone faster than my v6 Join Date: Mar 2007 Location: Houston, TX Posts: 1,604 iTrader: 0 reviews	holy hell...so your saying..i may have given correct advice for the first time!!!? hahaha

January 18th, 2008, 11:32 AM	#37
stephen Hardcore Enthusiast Join Date: Feb 2007 Posts: 1,262 iTrader: 0 reviews	I would definately at least check the resistance of the crank angle sensor in this situation.

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