Truck has a stutter
Thread Starter
|
New User
Joined: Sep 2007
Posts: 6
Likes: 0
Truck has a stutter
Hi, my name is lee brasso and i live in Broken Arrow OK and i just bought a 2000 F150 Lariat 4x2 with the 4.6 V8 and about a week after i owned it i noticed a stutter. i was not really sure what it was so i just did a little routine maintence. i changed the air filter and the spark plugs. while doing this i noticed one of the COP coils was bad when i took it off. the boot came off and stayed on the plug. i purchased a new one and after all this the problem still persisted. the stutter will not always be there. it just kinda chooses when it wants to do it. sometimes it is just barely noticeable and others its so bad it makes it hard to get up to speed. i have a check engine light on and i took it to my mechanic of about 20 years and he used his snap-on decoder and told me the light was an emisions thing. he couldnt really tell me what the stutter was other than it could be a bad coil or something this is when i went and changed all the plugs. what is this problem and how can i fix it. i love the truck and want it to run the way it is supposed to. i would appreciate and advice that any of you could give. thank you all Lee
Last edited by 2000_Lariat; Sep 24, 2007 at 12:01 PM.
Hotshot
Joined: Jul 2005
Posts: 11,931
Likes: 180
you need a new mechanic. "emmisions thing" has nothing to do with "cylinder fire problem". when you get the light, take the truck to AutoZone, have them read the code, then post here and someone will tell you what the best possibillity is.
Thread Starter
|
New User
Joined: Sep 2007
Posts: 6
Likes: 0
the service light was an emisions thing i didnt say that was the problem i just was not sure if that could have anything to do with it. also the mechanic did not say that it was part of the stutter nor did i in the post. i was just mentioning the fact it was on. is there any way i ca check the coils easily and inexpensively myself once again i thank you guys for the help
Posting Guru
Joined: Oct 2005
Posts: 2,209
Likes: 1
From: Louisville, Kentucky
COPs cannot be checked reliably with an ohmmeter. When you changed the spark plugs, what brand did you use? Also, did you apply di-electric grease inside each of the COP boots? Did you inspect the springs on the COPs for wear and corrossion?
While the CEL code may not be the source of this problem, there may be more than one code and any clue to other maldies would be helpful. Code numbers are most useful. Good luck!
While the CEL code may not be the source of this problem, there may be more than one code and any clue to other maldies would be helpful. Code numbers are most useful. Good luck!
Thread Starter
|
New User
Joined: Sep 2007
Posts: 6
Likes: 0
i put motorcraft plugs back in it and i did use di-electric compound and it still persists. i took it back to my mechanic to let him hook it back up to that snap-on decoder and it will look for codes as far back as like a year ago and it doesnt show any kind of misfireing problems no is it showing any others but the one emisions thing i know this is not what is causeing this but i appreciate all your guys help if you can think of anything else please let me know i guess i will just have to take it to them and let them tear into it i little bit
New User
Joined: Sep 2007
Posts: 1
Likes: 0
Same Problem
I have a '00 F-150 that just experienced the same problem. I thought I had a bad tank of gas and pumped a bunch of IsoHEET in and changed the fuel filter. That worked for about a day, then the problem came back. My mechanic played around a bit, and replaced the wires. The plugs were fairly new so he left them in. The new wires seemed to do the trick (about 3 months without incident. Incidentally, he told me that he spoke with his friend who works at the local Ford dealership. The guy said that some F-150's have problems with the head gasket around 100,000 miles, which leads to mis-firing. Hope this helps.
Trending Topics
Thread Starter
|
New User
Joined: Sep 2007
Posts: 6
Likes: 0
yes that helps alot. i too thought it was a bad tank of gas so i put some lucas injector cleaner in it and ran 2 tanks of 91 octane through it and like you said it stoped for about i week than it came back. if it was to the the head gasket what kind of price range would it cost to fix? thanks alot all this info is a help guys!! Lee
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic 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
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Senior User
Joined: Apr 2006
Posts: 331
Likes: 0
I would have your cats checked to see if they are making backpressure - this is bad for them, the engine and for power. Mine was doing the same thing on the top end. I changed everything (COPS, plugs, Cam sensor, cleaned the whole upper intake and injectors) and nothing fixed it.
I finally took it to an exhaust shop and the cats were melted, I replaced them and all is well again.
I would also try some Seafoam. Suck some in through your PCV system and put a bottle in your gas tank as well.
I finally took it to an exhaust shop and the cats were melted, I replaced them and all is well again.
I would also try some Seafoam. Suck some in through your PCV system and put a bottle in your gas tank as well.
Thread Starter
|
New User
Joined: Sep 2007
Posts: 6
Likes: 0
thank you that tip really helps and makes some since, since the check engine light is on and its for emisions so i will take it to an exhaust shop this weekind and hopefully it helps. also about the sea foam how do i do that i have never used it and sounds like its easy to mess something up thanks again guys eveything helps!!
Senior User
Joined: Apr 2006
Posts: 331
Likes: 0
seafoam is pretty easy. Just get your engine warmed up. then under the hood pull off your hose to your PCV and let it suck up most of the can of Seafoam Auto/Marine. The engine may stall, if not shut it off. Wait about 15 mins. Start it up and watch the smoke show.
Some have said to take it out and drive it hard to burn everything out others have said to just let it idle till it stops smoking or drive it lightly...
Some have said to take it out and drive it hard to burn everything out others have said to just let it idle till it stops smoking or drive it lightly...
Thread Starter
|
New User
Joined: Sep 2007
Posts: 6
Likes: 0
take the hose off of what. the PCV is the tube going from the throttle body to the valve cover correct. do i take it off of the throttle body or take it off of the plastic tube going to the valve cover. sorry if this seems dumb i just ont want to mess anything up
Thread
Thread Starter
Forum
Replies
Last Post
Hogtrapper
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
18
Dec 15, 2014 09:53 AM
ReluctantMechanic
Explorer, Sport Trac, Mountaineer & Aviator
2
Aug 29, 2014 04:03 PM
Dango
1997 - 2006 Expedition & Navigator
1
Jul 30, 2013 10:59 PM