5.4l RUNNING BAD
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5.4l RUNNING BAD
My 03 f250 5.4l 66,000 miles, just started running bad on my way home from work today. As soon as I started it I noticed the whole truck vibrating more than usual while idling, decrease in power and sometimes the power will kick in and out. We had a heavy down pour of rain today and was thinking maybe the cop's got wet?
can a heavy rain get into the engine just sitting in the parking lot?
there's no check engine light on.
I did a quick check on cylinders 1 and 5, pulled the cop's, checked the boots for tears and water and it all looked good.
I realize I need to check the other cylinders, but I wanted to get on here and see if you guys think Im looking in the right place before I did all of them.. Thanks!!!!
can a heavy rain get into the engine just sitting in the parking lot?
there's no check engine light on.
I did a quick check on cylinders 1 and 5, pulled the cop's, checked the boots for tears and water and it all looked good.
I realize I need to check the other cylinders, but I wanted to get on here and see if you guys think Im looking in the right place before I did all of them.. Thanks!!!!
Postmaster
Joined: Jan 2012
Posts: 2,693
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From: West of Chicago
When were the plugs changed? You might have a bad COP. Wich is what it sounds like. When they develop very small hairline cracks moisture will work its way in there. Do you have any codes/check engine light?
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Joined: Mar 2008
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Pull the coils
I replaced all my coil boots and springs and I still had a miss. I pulled the coils and realized that five of my ten coils had cracks in the bodies. I recommend pulling the coils and thoroughly inspecting them.
Here is a pic
You can buy an 8 pack of coil boots and springs on eBay for about $20.00.
Thanks
Here is a pic
You can buy an 8 pack of coil boots and springs on eBay for about $20.00.
Thanks
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thanks for the pic jerem0621 now I know what to look for Ill have to take a closer look at them. The plugs are stock I believe Kdr358 and there isn't a check engine light on.
I guess Im gonna have to check them all out
Thanks for the help
I guess Im gonna have to check them all out
Thanks for the help
FTE Leadership Emeritus
Joined: Sep 2000
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From: Stephensville WI
Have the truck scanned for pending codes. It takes a lot of misfires, almost a dead cylinder, to light the CEL.
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Joined: Mar 2008
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Even a cheap Amazon/eBay scanner would work. (not a bad thing to have in the old tool box)
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FTE Leadership Emeritus
Joined: Sep 2000
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From: Stephensville WI
Some do, most do not, but the key is the person flying the scanner has to know to look for them.
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thanks for all the help I think Ill get it scanned and hopefully one of the stores around here have one that checks pending codes!
If not ill be taking them all out today (attempting) this is the first time Ive had to do it on this truck, from what everyone says its not easy!!
If not ill be taking them all out today (attempting) this is the first time Ive had to do it on this truck, from what everyone says its not easy!!
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So i just got back from advanced auto parts and got misfire code p0307.
What spark plug should I buy?
Should i just go ahead and do all of them?
Im letting the engine cool and then im going to pull #7 cop and see if its anything obvious.
What spark plug should I buy?
Should i just go ahead and do all of them?
Im letting the engine cool and then im going to pull #7 cop and see if its anything obvious.
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HELP Please
MORE INTERESTING NEWS!!
So I pulled out number 7 spark plug and I look at it and find that the plug is motorcraft but the thread portion of the plug is a larger diameter than the other two that ive pulled and the new ones that I just bought.........errrr
so does this mean the previous owner must have stripped it out or something and thats how you fix it?
I dont know where to go from here. can I get a plug like that?
Im gonna try and post a pic of it.
So I pulled out number 7 spark plug and I look at it and find that the plug is motorcraft but the thread portion of the plug is a larger diameter than the other two that ive pulled and the new ones that I just bought.........errrr
so does this mean the previous owner must have stripped it out or something and thats how you fix it?
I dont know where to go from here. can I get a plug like that?
Im gonna try and post a pic of it.
