Detonation?
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Freshman User
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Detonation?
I bought a '01 V10 4x4 a couple of months ago. It only has about 29k miles. I noticed some very light detonation on the last tank of gas. On the current tank (different gas station) I'm noticing quite a bit of detonation on slight hill climbs.
Can you all think of anything to try other than higher grade fuel? Is this common at all for this engine? This think is already a fuel hog, so I'm hoping I don't have to run plus or premium fuel. Thanks
Can you all think of anything to try other than higher grade fuel? Is this common at all for this engine? This think is already a fuel hog, so I'm hoping I don't have to run plus or premium fuel. Thanks
Guest
Joined: Nov 2004
Posts: 7,988
Likes: 55
From: north west new jersey
i'd bet more likly with the age you need a good tuneup . with a fuel filter as this motor dislikes cloged or cloging up ones and tends to lean out.
gas hog don't start man 11 to 12 city is the norm. and the 5.4 v8 is no better ths is no car, it's a 7000 pound beast
gas hog don't start man 11 to 12 city is the norm. and the 5.4 v8 is no better ths is no car, it's a 7000 pound beast
Logistics Pro
Joined: Jan 2002
Posts: 3,733
Likes: 38
I say this about 15 times a year... make sure all the OTHER things that rattle are not the source of the ping/detonation... then get the motor repaired... a properly working system will retard the ignition and eliminate ALL detonation shortly after it happens and you should only be able to detect the gross loss of power but hardly every hear or sense the ping for more then a few seconds.
Out of warranty? Then start with quality gasoline, new fuel filter and clean air filter.. if it persists try mid grade 89 or high test 91-92 Octane only to determine if you really got ping... then fix the reason for the ping and get the V10 back to running on quality 87 lower cost fuel... I find that the oxygenated blend of so called "clean air fuels" are the worst offenders.... as is the 85 octane high altitude fuel
Some PCM codes suck... getting the latest Ford re-Flash update can help
Detonation or ping some times is a mis diagnosis for a plug fixing to fly out of the head... check every one of them!
But 90% of the time it is a loose exhaust shield or part...or the tin front trany shield is vibrating under load...
Out of warranty? Then start with quality gasoline, new fuel filter and clean air filter.. if it persists try mid grade 89 or high test 91-92 Octane only to determine if you really got ping... then fix the reason for the ping and get the V10 back to running on quality 87 lower cost fuel... I find that the oxygenated blend of so called "clean air fuels" are the worst offenders.... as is the 85 octane high altitude fuel
Some PCM codes suck... getting the latest Ford re-Flash update can help
Detonation or ping some times is a mis diagnosis for a plug fixing to fly out of the head... check every one of them!
But 90% of the time it is a loose exhaust shield or part...or the tin front trany shield is vibrating under load...
Lead Driver
Joined: Sep 2003
Posts: 5,844
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From: Albuquerque
Make sure it is not a rattle...and loss part. If all checks out...then I recommend replacing the fuel filter, air filter, and cleaning the MAF sensor. You should NEVER need 91 oct fuel in a stock OEM V10! 
Good luck...
biz
Good luck...
biz
FTE Leadership Emeritus
Joined: Jul 2002
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From: Long Island USA
Do one thing right away. Run the tank down to almost empty, and put 5-10 gallons of 89 or 91 or 93 octane in it. The lower the better, just one step up from 87, whatever is available. If the ping quiets down, it's a timing/EGR/carbon issue.
If it doesn't make a difference, it's a mechanical vibration, like the heat shields or the bellhousing cover.
If it doesn't make a difference, it's a mechanical vibration, like the heat shields or the bellhousing cover.
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Guest
Joined: Nov 2004
Posts: 7,988
Likes: 55
From: north west new jersey
you can't adjust the timing . it's all pcm controled. egr stuck shut if it one of the motors that has one, maybe . carbon another good point art.
i am more in line of that freaking pima lower front tin trans sheild we all have battled at one time or another. pull it off and see if it goes away.
fred as always states matters just as bluntly as possible, yes SIR! SARG. fuel filters, this motor sure lets you know when it's starting to plug up. you start feeling a loose of power .i have 25k on my 05 it's on filter number 3 already. thanks to uncle sam and this awfull new gas we have to use.
i am more in line of that freaking pima lower front tin trans sheild we all have battled at one time or another. pull it off and see if it goes away.
fred as always states matters just as bluntly as possible, yes SIR! SARG. fuel filters, this motor sure lets you know when it's starting to plug up. you start feeling a loose of power .i have 25k on my 05 it's on filter number 3 already. thanks to uncle sam and this awfull new gas we have to use.
Last edited by captchas; Dec 10, 2006 at 06:48 AM.
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Freshman User
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Thanks for the replies. I'm 99% sure it's pinging and not something rattling.
I'm going to go ahead and change the fuel filter. I picked one up from the Ford dealer Saturday. Any tricks to doing this? It looks like the filter just slides out and is not bolted in at all. When working on my Jeep, I've always just pulled the fuel pump relay and then started it to release any fuel pressure. Is this safe to do with the Ford, or do you all know another method? I've got one of the disconnect tools I beleive will work on the Ford fuel lines.
I'll try some different fuel next time. I don't drive the truck a lot, so it may be a while before I can test that.
Thanks
BTW, I have the Ford Base Care extended warranty. I don't see any mention of emissions related items being covered. I'll have to ask next time I'm at the dealership.
I'm going to go ahead and change the fuel filter. I picked one up from the Ford dealer Saturday. Any tricks to doing this? It looks like the filter just slides out and is not bolted in at all. When working on my Jeep, I've always just pulled the fuel pump relay and then started it to release any fuel pressure. Is this safe to do with the Ford, or do you all know another method? I've got one of the disconnect tools I beleive will work on the Ford fuel lines.
I'll try some different fuel next time. I don't drive the truck a lot, so it may be a while before I can test that.
Thanks
BTW, I have the Ford Base Care extended warranty. I don't see any mention of emissions related items being covered. I'll have to ask next time I'm at the dealership.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
Yes, pull the fuel pump fuse, and start the engine. When it dies, there's no pressure left
You need a special tool to get the fuel filter off. I'll let others detail that for you...
You need a special tool to get the fuel filter off. I'll let others detail that for you...
Thread Starter
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Freshman User
Joined: Nov 2006
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Originally Posted by krewat
Yes, pull the fuel pump fuse, and start the engine. When it dies, there's no pressure left
.
.
Is this the one you all pull? I was afraid if it controls the fuel injectors and the fuel pump, it may not actually releive the pressure.
Last edited by johnjk; Dec 16, 2006 at 03:46 AM.