How to change coil packs - Ford F150 Forum - Community of Ford Truck Fans

Go Back   Ford F150 Forum - Community of Ford Truck Fans > Late Model F150s > 1997 - 2003 Ford F150
Log In 

How to change coil packs

Thread Tools Search this Thread
Old 06-12-2009, 11:03 PM   #1
Junior Member
Join Date: Jun 2009
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Default How to change coil packs

I just got this 1999 F150 w/ 4.2l v6 automatic from an auction with 178 k miles on it -- yikes! Anhyhoo, on the drive home, it ran horribly. Symptoms are as follows:

Rough idle

Shuddering/sputtering/lack of power at high speed and on take off, better with OD off (at high speeds)

Smokes when sputtering

I have read that there are a number of issues that could cause this, but it sounds like coil packs/plugs would be a good place to start. So, let's say it is coil pack(s), then I have the following questions:

1. What codes should I expect (did not have time to scan today)
2. How do you replace the coil packs and plugs (I am neophyte when it comes to this stuff).
3. Let's say it's the torque converter, is that something I can do myself without a lift?

I looked in the how-to section and could not find anything on replacing the COPS. Thanx in advance for the help.
1999 F150 4.2L v6 Auto
khazouri is offline   Reply With Quote
Join F150 Forum

Join Today - It's Totally Free!

Are you a Ford F150 fan? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Ford F150 Fans to meet online.
Once you join you'll be able to post messages, upload pictures of your truck, and have a great time with other Ford F150 fans. Whether your an old timer or just bought your F150 you'll find that is a great community to join. Best of all it's totally free!

Join Today! - Click Here JOIN FOR FREE

Old 06-13-2009, 02:18 PM   #2
Senior Member
5 Year Member
TheJMC's Avatar
Join Date: Apr 2009
Location: Windsor,Ontario,Canada
Posts: 1,456
Thanks: 0
Thanked 8 Times in 8 Posts

New plugs and wires are most likely needed. I would start there before spending money on coil packs. Wait till it is dark and start the engine and spray the wires with a light mist of water. if you see a light show it is a sure sine that the wires are defective. After that I would suspect carbon build up in the EGR passages? Remove intake manifold and clean. But do the others first.

Jean Marc Chartier

Warn XD900i, OBX LTs, E-fans, Hurst shifter, Procharger @15psi, Troyer tuned.
Swap notes 4.6 to 5.4
TheJMC is offline   Reply With Quote
Old 06-13-2009, 02:24 PM   #3
Local Roofer
02flaresidesport's Avatar
Join Date: Feb 2009
Location: Kennedale, TX
Posts: 653
Thanks: 0
Thanked 0 Times in 0 Posts

I know on my 02, there is just one coil pack held on by some small screws. It should be that hard, if you know that is what it is. I finally got my check engine light off today. I had to replace my entire exhaust, manifolds etc. Im only at 130k.
02 F150 Flareside
mods: black 20's lowered murdered out look, cat back system, CAI, billet grill,custom ford emblem.
02flaresidesport is offline   Reply With Quote
Old 06-14-2009, 04:37 PM   #4
Junior Member
Join Date: Jun 2009
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts

Did the plugs and wires today. There are no coil packs on the 1999 v6 4.2l, just the coil bank with the six wires attached.

The new plugs and wires fixed everything -- it runs great now. I'll do the fuel filter and get the bottom of the EGR code at some point in the future.

Thanx to all for your replies ...
1999 F150 4.2L v6 Auto
khazouri is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Real bad Vibration / Shake in rear end fnbeertime 2004 - 2008 Ford F150 12 09-02-2016 02:10 PM
Need help with P0022, P0354, and P0355 Chipadelphia 2004 - 2008 Ford F150 13 12-03-2015 08:36 AM
My new truck Platinum_Dawg 2015 - Present Ford F150 18 09-14-2015 08:02 PM
ewb needs 911 help doctruptwn Maintenance Shop 4 09-08-2015 10:29 AM
Coil spring rubbing a-arm str808F150 2015 - Present Ford F150 24 09-06-2015 12:38 AM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Refbacks are Off

All times are GMT -4. The time now is 12:55 AM.

Copyright 2006 - 20011
This site is in no way affiliated with the Ford Motor Company.