Sputtering
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Junior User
Joined: Mar 2012
Posts: 90
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From: Omaha, NE
Sputtering
The gas cuts in and out unless I am putting the pedal down. When I'm on the interstate I'll set the cruise to 60 and you'll feel the constant fluctuation. It jerks back and forth enough that it feels like its part of the bad suspension.
Could this be a sign that some COPs are going bad, or are dead? I've had the EX for a few weeks and received a P0720 code that cleared itself. The EX died three times, the code appeared, and it ran fine again until the code disappeared.
Also, when I lay into the gas there is a higher pitched sound. Either exhaust leak or something with the drive shaft. Doesn't seem to be coming from the engine bay.
Start suggesting.
Could this be a sign that some COPs are going bad, or are dead? I've had the EX for a few weeks and received a P0720 code that cleared itself. The EX died three times, the code appeared, and it ran fine again until the code disappeared.
Also, when I lay into the gas there is a higher pitched sound. Either exhaust leak or something with the drive shaft. Doesn't seem to be coming from the engine bay.
Start suggesting.
Posting Guru
Joined: Dec 2011
Posts: 1,016
Likes: 0
I would describe bad COPs and misfires as bucking. Sputtering is how I would describe a manifold leak or other exhaust leak.
Also that high pitch noise when you "get on it" could be just the normal sound. When you get that V10 going over 3K RPM it sounds like a banshee, especially with my exhaust system.
Have a look at this thread... https://www.ford-trucks.com/forums/1...mal-sound.html
Also that high pitch noise when you "get on it" could be just the normal sound. When you get that V10 going over 3K RPM it sounds like a banshee, especially with my exhaust system.
Have a look at this thread... https://www.ford-trucks.com/forums/1...mal-sound.html
Postmaster
Joined: Jan 2012
Posts: 2,693
Likes: 3
From: West of Chicago
Have you replaced anything since you got it? I would just go to the dealer and pony up the $$ for good quality ones, also replace the spark plugs with motorcraft. Just because the code cleared itself dosent mean the problem went away. How's the transmission fluid and have you serviced it? It could be torque converter shudder. Also check the fuel pressure.
Posting Guru
Joined: Dec 2011
Posts: 1,016
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Not really, a manifold leak sounds like a sputter, not really a whine. Also my new manifold leak is most noticeable right at 2K rpm. When the engine is really racing 3K-4.5K rpm it is very loud. Louder than the manifold leak. It doesn't roar like a V8 does, the pitch of the V10 noise is much higher.
I could try to record some sounds of my truck with my cell phone and post a video, I'm not sure how well it'll come out though. Maybe I should try it with my computer and a web cam.
I could try to record some sounds of my truck with my cell phone and post a video, I'm not sure how well it'll come out though. Maybe I should try it with my computer and a web cam.
Posting Guru
Joined: May 2012
Posts: 1,758
Likes: 3
From: Colorado
The gas cuts in and out unless I am putting the pedal down. When I'm on the interstate I'll set the cruise to 60 and you'll feel the constant fluctuation. It jerks back and forth enough that it feels like its part of the bad suspension.
Could this be a sign that some COPs are going bad, or are dead? I've had the EX for a few weeks and received a P0720 code that cleared itself. The EX died three times, the code appeared, and it ran fine again until the code disappeared.
Also, when I lay into the gas there is a higher pitched sound. Either exhaust leak or something with the drive shaft. Doesn't seem to be coming from the engine bay.
Start suggesting.
Could this be a sign that some COPs are going bad, or are dead? I've had the EX for a few weeks and received a P0720 code that cleared itself. The EX died three times, the code appeared, and it ran fine again until the code disappeared.
Also, when I lay into the gas there is a higher pitched sound. Either exhaust leak or something with the drive shaft. Doesn't seem to be coming from the engine bay.
Start suggesting.
Does it fluctuate when you hold the throttle steady and drive 60 ?
the exact wording is: P0720 = Output Speed Sensor Circuit Malfunction.
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Cargo Master
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Junior User
Joined: Mar 2012
Posts: 90
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From: Omaha, NE
I'm surprised nobody has looked up that code. It's related to the speed sensor and could very well explain the fluctuation when in cruise mode.
Does it fluctuate when you hold the throttle steady and drive 60 ?
the exact wording is: P0720 = Output Speed Sensor Circuit Malfunction.
Does it fluctuate when you hold the throttle steady and drive 60 ?
the exact wording is: P0720 = Output Speed Sensor Circuit Malfunction.
More Turbo
Joined: Nov 2011
Posts: 608
Likes: 1
From: Weston Fl.
I had this issue and am very familiar with these simpthoms. To cut it short i replaced all cops and everything is sweet. But before that I spent a pretty penny troubleshoting. Turns out my manifold had a crack, and was leaking into my 8th cop and I also had bad head seal so oil also leaked into the spark ports thus getting misfires. All is well now but it took me some time. My baby is running so sweet now that I'm amazed everyday. While there I replaced all 8 injectors. The fix was simple with a 4in pivot extension for your wrachet.
Junior User
Joined: Jan 2011
Posts: 78
Likes: 0
I had this issue and am very familiar with these simpthoms. To cut it short i replaced all cops and everything is sweet. But before that I spent a pretty penny troubleshoting. Turns out my manifold had a crack, and was leaking into my 8th cop and I also had bad head seal so oil also leaked into the spark ports thus getting misfires. All is well now but it took me some time. My baby is running so sweet now that I'm amazed everyday. While there I replaced all 8 injectors. The fix was simple with a 4in pivot extension for your wrachet.
Hey 809taino, what did you do to fix the blue highlight? Just tighten the existing head studs? Because that is EXACTLY what I have going on. 3 plugs had oil on them when I did a plug change.
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