banging under the hood
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More Turbo
Joined: Dec 2003
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From: Park County, CO
banging under the hood
I did a search and turned up nothing. My 04/04 has a wierd issue. If I quickly let off the throttle in 2nd or 3rd gear (around 2000 rpm)I hear banging under the hood. It sounds like air ducts hitting stuff or the turbo flexing into something. Anyone else ever have this problem? I usually get 3 quick bangs (bang-bang-bang). If I let off the throttle slowly, all is normal.
I drove my truck from Dallas to Aspen last week and found 3 issues. First the banging, next the airbag light would flash 5 times and stay on (would reset on restart and then repeat), and lastly the truck would not cold start worth a damn at 8000 feet elevation.
Off to the dealer on Monday
I drove my truck from Dallas to Aspen last week and found 3 issues. First the banging, next the airbag light would flash 5 times and stay on (would reset on restart and then repeat), and lastly the truck would not cold start worth a damn at 8000 feet elevation.
Off to the dealer on Monday
Posting Guru
Joined: Jan 2004
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you might want to check all the pipes coming off turbo and after cooler make sure clamps are tight. Also the air filter box make sure the latches are latched. also they have high elevation problem incorporated in the last flash I believe.
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Joined: Mar 2003
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SSLS6,
https://www.ford-trucks.com/forums/s...hreadid=209813
It's becoming a disturbing but "normal" trend.
https://www.ford-trucks.com/forums/s...hreadid=209813
It's becoming a disturbing but "normal" trend.
Senior User
Joined: Jul 2003
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From: Northeastern Pennsylvania
Mine does this noise, but not on abrupt deceleration, but during a long hard pull. If I don't downshift quickly enough, sounds like the excess pressure from the turbo is coming back through the intake. Have yet to hear it during deceleration though. So I am the odd ball. I suspect the variable vain is not responding to the lower RPMs and is still trying to pump as much air into the cylinder as it can. I suspect the noise is a stall of the turbo, which can't be good. So I just make sure I downshift early now! Takes me to be different!
Lariat
Lariat
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Thread Starter
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More Turbo
Joined: Dec 2003
Posts: 534
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From: Park County, CO
Re: Re: Thanks
Originally posted by Tim Lamkin
Tell us what you find
Tell us what you find
The dealer called me to tell me that 1) the banging was normal, 2) that they replaced my EGR, and 3) they reflashed the ECM. The dealer also replaced my airbag switch and 6-disc CD changer (both had problems).
The truck I have today is not the truck I test drove and bought. I still like the truck but feel Ford pulled a "bait & switch" on me. If during the test drive the truck made a loud banging sound, I would have left it in the lot!
Disappointed in Dallas
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Joined: Jan 2003
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From: 3rd Rock
Go back (in you mind) and start documenting everything that is happening. Names, dates, times, and every person you speak with. From the moment you brought the truck home the first time.
Document Document Document
Document Document Document
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SSLS6S,
Yep, that's the standard procedure. Change EGR to make it look like they're doing something, reflash the PCM to ignore the EGR when it opens sporatically to avoid any CEL's and then tell the customer that everything is normal and you'll just have to live with a louder engine at idle (no pilot inj) and one that bangs on deceleration sometimes. Quite a product.
A little different sales pitch than we all got the day we signed at the bottom. I sent my paperwork off to the Ford dispute claims board to see what happens. I wish I could just go back and show them my receipt and return it like it was a shirt or something.
Yep, that's the standard procedure. Change EGR to make it look like they're doing something, reflash the PCM to ignore the EGR when it opens sporatically to avoid any CEL's and then tell the customer that everything is normal and you'll just have to live with a louder engine at idle (no pilot inj) and one that bangs on deceleration sometimes. Quite a product.
A little different sales pitch than we all got the day we signed at the bottom. I sent my paperwork off to the Ford dispute claims board to see what happens. I wish I could just go back and show them my receipt and return it like it was a shirt or something.
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From: Big Horn, Wy.
Lariat,
Do you have a 6-speed? Because my mother's f250 does the same thing under heavy load. It sounds like the engine is trying to jerk itself out of the mounts. This only happens under full boost, regardless whether the engine is wrapped up ur not. The engine is actually missing when it does this on her pickup. The Ford tech said she just needed to downshift, but I don't agree with this. Under heavy load on the interstate, I can make it do this, and one cannot downshift at that speed without hurting the engine, so then what are you supposed to do, let it rip itself apart? If there are any known misfiring issues with these engines, please point me in the right direction somebody.
Do you have a 6-speed? Because my mother's f250 does the same thing under heavy load. It sounds like the engine is trying to jerk itself out of the mounts. This only happens under full boost, regardless whether the engine is wrapped up ur not. The engine is actually missing when it does this on her pickup. The Ford tech said she just needed to downshift, but I don't agree with this. Under heavy load on the interstate, I can make it do this, and one cannot downshift at that speed without hurting the engine, so then what are you supposed to do, let it rip itself apart? If there are any known misfiring issues with these engines, please point me in the right direction somebody.
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From: Northeastern Pennsylvania
Originally Posted by PhilipG
Lariat,
Do you have a 6-speed? Because my mother's f250 does the same thing under heavy load. It sounds like the engine is trying to jerk itself out of the mounts. This only happens under full boost, regardless whether the engine is wrapped up ur not. The engine is actually missing when it does this on her pickup. The Ford tech said she just needed to downshift, but I don't agree with this. Under heavy load on the interstate, I can make it do this, and one cannot downshift at that speed without hurting the engine, so then what are you supposed to do, let it rip itself apart? If there are any known misfiring issues with these engines, please point me in the right direction somebody.
Do you have a 6-speed? Because my mother's f250 does the same thing under heavy load. It sounds like the engine is trying to jerk itself out of the mounts. This only happens under full boost, regardless whether the engine is wrapped up ur not. The engine is actually missing when it does this on her pickup. The Ford tech said she just needed to downshift, but I don't agree with this. Under heavy load on the interstate, I can make it do this, and one cannot downshift at that speed without hurting the engine, so then what are you supposed to do, let it rip itself apart? If there are any known misfiring issues with these engines, please point me in the right direction somebody.
Reaching, but since it was just flashed, perhaps the PCM is not funtioning properly, and not setting codes. See another dealer. And if you can, make it do this on a test drive.
Lariat
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From: 3rd Rock
Originally Posted by Lariat
PhilipG, Yes, I have a 6 speed, but mine will only do this when the engine revs come down quite quickly, at high boost. I have a very steep grade that will knock the engine back to 1200 RPM very quickly, then I get the backfire, if you will, about 1 per second. This is the only time and place that I can make this do this. Sounds to me, that you may have an overboost condition. What I believe to happen is the excess pressure, which the engine just cant take any more of, is coming back into the intake, through the turbo. This does not have a waste gate, but perhaps should have, just set higher. I believe this is why so many tubes are blowing off, and sometimes destroying the intercooler.
Reaching, but since it was just flashed, perhaps the PCM is not funtioning properly, and not setting codes. See another dealer. And if you can, make it do this on a test drive.
Lariat
Reaching, but since it was just flashed, perhaps the PCM is not funtioning properly, and not setting codes. See another dealer. And if you can, make it do this on a test drive.
Lariat
Good point about the over boots and tubes