Go Back   F150online Forums > Powertrain & Mechanical > V8 Engines
Sign in using an external account
Register Forgot Password?
Register Photos Vin Decoder FAQ Members Search Today's Posts Mark Forums Read VendorsGarage




Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
  #1  
Old 05-01-2009, 11:31 PM
Senior Member
Garage is empty, add now
 
Join Date: Sep 2006
Vehicle: 2005 Ford F150
Posts: 1,064
Why Do Coil Packs Go Out So Much

Mine havent gone yet. ( 63k miles) but a bunch of my buddys have replaced numerous coil packs. Are they defective or just bad design?
__________________
2005 Ford F-150 Lariat Supercrew 4x4

http://www.f150online.com/galleries/....cfm?gnum=8849
Reply With Quote
  #2  
Old 05-01-2009, 11:46 PM
Senior Member
Garage is empty, add now
 
Join Date: Jan 2007
Location: Incirlik AB, Turkey
Posts: 625
Send a message via AIM to polpilot Send a message via Yahoo to polpilot
bad design (i think) whats wrong with plain onld coil and wires? i repaced 2 just today! and at $40 a piece i hope i dont have to do the other 6 anytime soon
__________________
Sold
2001 F150 4.6L
True dual W/ 14" magnaflows
PHP tuned Gryphon
UD pullies
K&N intake
Type 3 injectors
Pacesetter Longtube headers
Expy center console
4-4 drop
3.73LS
275/45/20 kumho Escta
20x9 Panther Vector wheels
http://www.f150online.com/galleries/....cfm?num=14182
Reply With Quote
  #3  
Old 05-02-2009, 12:00 AM
glc glc is offline
Senior Member
Garage is empty, add now
 
Join Date: Dec 2006
Location: Joplin MO
Vehicle: 2003 Ford F150
Posts: 27,846
The most common reasons for them going out are not using dielectric grease properly when installing, and from washing your engine.

Why are you paying $40 each when you can get a full set of 8 for 70 bucks plus shipping (135 bucks plus shipping for the 3V) on Ebay?
__________________
2003 F-150 XL RCSB 2wd 4.2 M5OD 3.55 LS
Reply With Quote
  #4  
Old 05-02-2009, 12:18 AM
Senior Member
Garage is empty, add now
 
Join Date: Jan 2007
Location: Incirlik AB, Turkey
Posts: 625
Send a message via AIM to polpilot Send a message via Yahoo to polpilot
Quote:
Originally Posted by glc View Post
The most common reasons for them going out are not using dielectric grease properly when installing, and from washing your engine.

Why are you paying $40 each when you can get a full set of 8 for 70 bucks plus shipping (135 bucks plus shipping for the 3V) on Ebay?
cuz i needed them now... the car show is this weekend (im entering into the burn-out comp, and hopeing for 1st place) and i didnt want the truck running like ***... and i did the full set off ebay and i just replaced 2 of em after like 8 months.
Reply With Quote
  #5  
Old 05-02-2009, 12:27 AM
Member
1997 Ford F-150
 
Join Date: Oct 2007
Location: Garland TX
Vehicle: 1997 Ford F150
Posts: 68
Quote:
Originally Posted by HiVoltage14.4 View Post
Mine havent gone yet. ( 63k miles) but a bunch of my buddys have replaced numerous coil packs. Are they defective or just bad design?
Are you talking about coil packs for the 4.2 v6 and early pre 00 4.6 v8 or do you mean COP's (coil on plug) on the 5.4's? Like anything else wear and tear, age, conditions. Replaced my COP's on my 97 when doing the 100k tuneup a couple years ago they were not bad but I was there and the one's I bought were reasonable and I'm a believer in not buying the same ground twice. My Operations Manager Has over 200k on his 05 and they are still the originals. Then I've got a friend that has an 01 and about every other rain storm he has to replace one because it gets wet. Still haven't figured out that one, he just keeps a couple of extra one's in the tool box and yes dielectric grease. There's alot of threads on here about COP's what it comes down to is the Motorcrafts are expensive and the old aftermarket standby's like Accel and MSD etc are crap don't waist your money. Then you have the one's from Global or Uneek Auto on Ebay that are tried and true on this forum with the very few exceptions compared to previously named suppliers and very reasonable. Not to mention the Globals have a lifetime warranty not sure about Uneek's it's easy enough to keep an extra set in the toolbox for the next tuneup on your truck or someone you know. I remember back in the 70's I kept a new set of plugs, wires, rotor, rotor cap, coil, points, condenser, and can of WD-40 in the trunk of my 66 Mustang. These are things that naturaly were out some sooner than others.
__________________

97 F150 XLT Supercab 5.4L
Gryphon Tuner
Gotts Intake
Bone Stock for now or at least apears to be.

Last edited by 97fordnut; 05-02-2009 at 12:41 AM.
Reply With Quote
  #6  
Old 05-02-2009, 12:35 AM
Member
1997 Ford F-150
 
Join Date: Oct 2007
Location: Garland TX
Vehicle: 1997 Ford F150
Posts: 68
Quote:
Originally Posted by glc View Post
The most common reasons for them going out are not using dielectric grease properly when installing, and from washing your engine.

Why are you paying $40 each when you can get a full set of 8 for 70 bucks plus shipping (135 bucks plus shipping for the 3V) on Ebay?
Yup that 2. They are cheep enough to buy a set and throw them in the toolbox or on the shelf for when you might need them. They usually take about 4 to 5 days to come in the mail.
Reply With Quote
  #7  
Old 05-02-2009, 12:49 AM
Technical Article Contributor
Garage is empty, add now
 
Join Date: Oct 2005
Location: MI
Vehicle: 1998 Ford F150 5.4L 4X4
Posts: 25,386
Quote:
Originally Posted by HiVoltage14.4 View Post
Mine havent gone yet. ( 63k miles) but a bunch of my buddys have replaced numerous coil packs. Are they defective or just bad design?

You must have a V6 - You can post in the V6 forum for specific info. This is news to me, -Coil Pack problems?? Hell, they usually last quite awhile. COP systems are more of a problem. BUT! - those are on the V8's , so, - NO WORRIES, for you and your buds

4.2L's have them, 4.6L's had them from 1997-2001, 5.4L's NEVER had them.

Last edited by jbrew; 05-02-2009 at 01:03 AM.
Reply With Quote
  #8  
Old 05-02-2009, 02:21 AM
glc glc is offline
Senior Member
Garage is empty, add now
 
Join Date: Dec 2006
Location: Joplin MO
Vehicle: 2003 Ford F150
Posts: 27,846
He has cops - he's just calling them coil packs. Don't dog on him too bad.
__________________
2003 F-150 XL RCSB 2wd 4.2 M5OD 3.55 LS
Reply With Quote
  #9  
Old 05-02-2009, 02:41 AM
Technical Article Contributor
Garage is empty, add now
 
Join Date: Oct 2005
Location: MI
Vehicle: 1998 Ford F150 5.4L 4X4
Posts: 25,386
Quote:
Originally Posted by glc View Post
He has cops - he's just calling them coil packs. Don't dog on him too bad.

Am I *******? Coil pack Ignitions and COP Ignition systems are two very different systems. Wouldn't you want to know which you have? I posted the systems above, he can take it anyway he wants, -it's more less enlightening. It might save him a trip to the parts store.

Last edited by jbrew; 05-02-2009 at 04:30 AM.
Reply With Quote
  #10  
Old 05-02-2009, 10:11 AM
Senior Member
Garage is empty, add now
 
Join Date: Mar 2008
Location: Alpharetta, GA
Vehicle: 2002 Ford F150
Posts: 188
Quote:
Originally Posted by jbrew View Post
Am I *******? Coil pack Ignitions and COP Ignition systems are two very different systems. Wouldn't you want to know which you have? I posted the systems above, he can take it anyway he wants, -it's more less enlightening. It might save him a trip to the parts store.
How come the Ford dealership keeps calling them coil packs then? I had a couple go bad and they said it was the coil pack they said nothing about COPs?
Reply With Quote
  #11  
Old 05-02-2009, 11:04 AM
Technical Article Contributor
Garage is empty, add now
 
Join Date: Oct 2005
Location: MI
Vehicle: 1998 Ford F150 5.4L 4X4
Posts: 25,386
Quote:
Originally Posted by doubleplayer View Post
How come the Ford dealership keeps calling them coil packs then? I had a couple go bad and they said it was the coil pack they said nothing about COPs?
They lack education, help them out.

A coil "pack" for our models is in charge of 4 or more cylinders. Coil Packs use plug wires.

COP (Coil Over Plug) systems consist of dedicated coils = One per cylinder. - No "Pack". No "Plug Wires" ... You follow ?

Who is the Ford dealership anyway ?? You won't hear a tech calling them what their not.

They are simply a coil (single) - not a coil pack. Two completely different parts that aren't interchangeable.

But yea, straighten your dealership out or keep it under your hat, if you want. Their "Coils" period.

Last edited by jbrew; 05-02-2009 at 01:44 PM.
Reply With Quote
  #12  
Old 05-02-2009, 02:03 PM
Member
Garage is empty, add now
 
Join Date: May 2009
Location: Northern Utah
Vehicle: 2001 Ford F150
Posts: 10
COP Source

I just bought a 2001 F150 w/ 4.6 l. After it is warm it will mis-fire, but it does not generate any codes or check engine light. This seems to be a relatively common problem that is likely to be associated with a marginally bad COP.

97fordnut mentioned Global and Uneek Auto on e-bay as sources for COPs. After searching e-bay, I was unable to find them. Can anyone provide a link?

One other question... The mounting screw for #7 COP on my 4.6 V8 is a bugger to get to, there is a fuel sensor directly over it. Any suggestions on the best way to get at it? Swivel socket w/ extension?? Pull the full rail??

In researching this problem I found a blog entry by Joseph Carrillo, a service tech on www.justanswer.com. He suggested that the intermittent misfire could be captured by a "mastertech scan tool , or the actual ford diag tool" while the vehicle was on the road. "Then once you can see the cylinder or cylinders that are being flagged by the misfire counter , then it will help to isolate the problem." (http://www.justanswer.com/questions/...blems-missfire, accessed 02 May 2009)

This seems like a handy idea, but if the ECU is not flagging it, would the diagnostic tool detect it?

Eugene B
Reply With Quote
  #13  
Old 05-02-2009, 02:10 PM
glc glc is offline
Senior Member
Garage is empty, add now
 
Join Date: Dec 2006
Location: Joplin MO
Vehicle: 2003 Ford F150
Posts: 27,846
Search Ebay for "DG508", but if you have a 5.4 3V, search for "DG511".
__________________
2003 F-150 XL RCSB 2wd 4.2 M5OD 3.55 LS
Reply With Quote
  #14  
Old 05-02-2009, 03:11 PM
Technical Article Contributor
Garage is empty, add now
 
Join Date: Oct 2005
Location: MI
Vehicle: 1998 Ford F150 5.4L 4X4
Posts: 25,386
Quote:
Originally Posted by eugeneb View Post
I just bought a 2001 F150 w/ 4.6 l. After it is warm it will mis-fire, but it does not generate any codes or check engine light. This seems to be a relatively common problem that is likely to be associated with a marginally bad COP.

97fordnut mentioned Global and Uneek Auto on e-bay as sources for COPs. After searching e-bay, I was unable to find them. Can anyone provide a link?

One other question... The mounting screw for #7 COP on my 4.6 V8 is a bugger to get to, there is a fuel sensor directly over it. Any suggestions on the best way to get at it? Swivel socket w/ extension?? Pull the full rail??

In researching this problem I found a blog entry by Joseph Carrillo, a service tech on www.justanswer.com. He suggested that the intermittent misfire could be captured by a "mastertech scan tool , or the actual ford diag tool" while the vehicle was on the road. "Then once you can see the cylinder or cylinders that are being flagged by the misfire counter , then it will help to isolate the problem." (http://www.justanswer.com/questions/...blems-missfire, accessed 02 May 2009)

This seems like a handy idea, but if the ECU is not flagging it, would the diagnostic tool detect it?

Eugene B
Yea , that's the regulator over #7. I just pull the rail and flip it up on top of the manifold, - it's just 4 8mm bolts.

The only way I could monitor coils during the drive cycle was to tape a probe to the coil and extend the probe light wires thru the firewall into the cab. It sucks, but you can pickup a low grade misfire that way. You need a probe that picks up pulse. The PCM shoots a low voltage signal to each coil. The coil converts to pulse. The probe blinks with pulse, allot like a noid light.

Carquest has those probes, if you want to go thru the trouble -

Click the image to open in full size.

Yea the ECU or PCM rather won't usually pickup a low grade misfire. You have quite a few options to pin point . But, that's IF you want to go thru the trouble and expense. The cheapest and less time consuming way is to swap out the entire set.
__________________
Windsor Built 5.4L, E40D, Transgo kit, 9.75 Rear gear, Brembo rotors, Carquest Blue's, Bilstein's, Ported & Polished Intake/TB, Denso Iridium's, Pace setter LTH's, Magnaflow HFC's, Magnaflow 20X9X2.5 HF Muffler, Type 3 19lb Injectors, Volant Intake w/Amsoil EEA191 Filter, 265/17 GY Fortera's.

Compression Testing Procedure

Last edited by jbrew; 05-02-2009 at 03:20 PM.
Reply With Quote
  #15  
Old 05-02-2009, 03:46 PM
glc glc is offline
Senior Member
Garage is empty, add now
 
Join Date: Dec 2006
Location: Joplin MO
Vehicle: 2003 Ford F150
Posts: 27,846
Or you can try to drive it in such a manner that you force the misfire till it finally trips the CEL.
__________________
2003 F-150 XL RCSB 2wd 4.2 M5OD 3.55 LS
Reply With Quote
Old 05-02-2009, 03:46 PM


 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are On
Refbacks are Off



All times are GMT -4. The time now is 02:15 PM.


 
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company
Contact Us Advertising Privacy Statement Terms of Service Jobs Forum Text Archives
Emails & Contact Details

Search Engine Friendly URLs by vBSEO 3.5.2