Shudder -- ignition?
Thread Starter
|
Freshman User
Joined: Dec 2003
Posts: 43
Likes: 0
Shudder -- ignition?
I am experiencing a shudder on my 98 4.6 expedition with 133K miles. Over the year, my gas mileage has dropped to 12-13mpg. Now I have the shudder. About a month ago, I had a check engine light on and found I had antifreeze in plug 6. I fixed that and the shudder is still here. The ignition has never been replaced.
Question. Should the plugs and wires be replaced? How about the coils? Do you use aftermarkets?
I was looking at FORD SOS Coils and it looks like the wires and coils are part of the same. Is that true? http://www.performancedistributors.com/soscoils.htm
How hard of a job is this?
Thanks!
Question. Should the plugs and wires be replaced? How about the coils? Do you use aftermarkets?
I was looking at FORD SOS Coils and it looks like the wires and coils are part of the same. Is that true? http://www.performancedistributors.com/soscoils.htm
How hard of a job is this?
Thanks!
Fleet Owner
Joined: Apr 2008
Posts: 24,322
Likes: 5,132
From: 0,0,1
At 133K have the plugs ever been changed?
In 98, I thought the 4.6 still had coil packs and spark plug wires? The link you provided shows a COP which is on all 5.4 engines and later year 4.6 motors. Can you confirm if your's has spark plug wires or not?
In 98, I thought the 4.6 still had coil packs and spark plug wires? The link you provided shows a COP which is on all 5.4 engines and later year 4.6 motors. Can you confirm if your's has spark plug wires or not?
Thread Starter
|
Freshman User
Joined: Dec 2003
Posts: 43
Likes: 0
The plugs have not been changed and are the originals.
I pulled plug #6 and the tip looked gray. I believe it has just wires. When I pulled the wire, it had a 6" boot and I followed the wire to a pack.
How would I tell if it has coils?
I pulled plug #6 and the tip looked gray. I believe it has just wires. When I pulled the wire, it had a 6" boot and I followed the wire to a pack.
How would I tell if it has coils?
Fleet Owner
Joined: Apr 2008
Posts: 24,322
Likes: 5,132
From: 0,0,1
According to the maintenance schedule, the plugs are supposed to be changed at 100K miles, so you're overdue with those. I would first change the plugs and see if the problem goes away, before wasting money on others problems that might not exist.
Thread Starter
|
Freshman User
Joined: Dec 2003
Posts: 43
Likes: 0
Resolved
I replaced the plugs last night with Motorcrafts. The plugs that were in there were AutoLites and they must have be in there before I bought it at 60,000.
Anyways, the truck ran very smooth.
Thanks for the advice on starting with the plugs and seeing what happens.
Anyways, the truck ran very smooth.
Thanks for the advice on starting with the plugs and seeing what happens.
Trending Topics
FTE Sponsor
Joined: Aug 2006
Posts: 755
Likes: 0
[quote=ebraunusa;7862152]I am experiencing a shudder on my 98 4.6 expedition with 133K miles. Over the year, my gas mileage has dropped to 12-13mpg. Now I have the shudder. About a month ago, I had a check engine light on and found I had antifreeze in plug 6. I fixed that and the shudder is still here. The ignition has never been replaced.
Question. Should the plugs and wires be replaced? How about the coils? Do you use aftermarkets?
I was looking at FORD SOS Coils and it looks like the wires and coils are part of the same. Is that true? http://www.performancedistributors.com/soscoils.htm
How hard of a job is this?
We show that your model Expedition utilizes 2 coil packs-NOT COP's.
Please see what you need at:
http://www.performancedistributors.com/97f150.htm
Question. Should the plugs and wires be replaced? How about the coils? Do you use aftermarkets?
I was looking at FORD SOS Coils and it looks like the wires and coils are part of the same. Is that true? http://www.performancedistributors.com/soscoils.htm
How hard of a job is this?
We show that your model Expedition utilizes 2 coil packs-NOT COP's.
Please see what you need at:
http://www.performancedistributors.com/97f150.htm
__________________
FTE Sponsor
Performance Distributors
www.PerformanceDistributors.com
FTE Sponsor
Performance Distributors
www.PerformanceDistributors.com
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
trouble_truck_guy
2004 - 2008 F150
3
Jan 15, 2013 03:03 PM
quaddriver
1987 - 1996 F150 & Larger F-Series Trucks
20
Nov 1, 2011 02:24 PM
RxWarrior
1997 - 2006 Expedition & Navigator
1
Apr 29, 2007 10:36 AM
01, 1997, 46, coil, coils, distributors, expedition, f150, ford, ignition, motorcraft, original, performance, plugs, shudder, shuddering, sos
