Let’s play what’s that sound!
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Tuned
Joined: Dec 2018
Posts: 400
Likes: 68
From: Eastern shore, MD
Let’s play what’s that sound!
Alright...I’m trying to figure out what’s causing this sound. It’s already been to a transmission shop and their analysis says it’s not the transmission. Their theory is it’s harmonic vibration and stops because the engine shifts on its mounts when it goes into reverse...perhaps an exhaust leak they said.
it started out of the blue last Friday, and when driving slowly in reverse it will “come back”
no DTCs. Buzz test and CCT were normal per forscan. No loss of power. No smoke.
it started out of the blue last Friday, and when driving slowly in reverse it will “come back”
no DTCs. Buzz test and CCT were normal per forscan. No loss of power. No smoke.
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,352
Likes: 5,946
From: Lake Hartwell, GA
I get the same response as Zach when clicking on the video link. Make sure you didn't accidentally list the video as private or unlisted.
EDIT: I can hear the difference in the sound, but I am sorry that I cannot help in any way. Does the engine run fine and the transmission act as it should other than the strange noise?
EDIT: I can hear the difference in the sound, but I am sorry that I cannot help in any way. Does the engine run fine and the transmission act as it should other than the strange noise?
Thread Starter
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Tuned
Joined: Dec 2018
Posts: 400
Likes: 68
From: Eastern shore, MD
I get the same response as Zach when clicking on the video link. Make sure you didn't accidentally list the video as private or unlisted.
EDIT: I can hear the difference in the sound, but I am sorry that I cannot help in any way. Does the engine run fine and the transmission act as it should other than the strange noise?
EDIT: I can hear the difference in the sound, but I am sorry that I cannot help in any way. Does the engine run fine and the transmission act as it should other than the strange noise?
It seems to be running as it should...its bone stock except a 6637...shifts are firm....had the torque converter replaced (upgraded to triple disc billet low stall and got rid of my noisy 99 converter, trans inspected then as well) about 1300 miles or so before it started which is why it went straight back to the transmission shop...
I literally parked at my sons school to pick him up last Friday, and when I walked out immediately noticed the difference...I haven't had enough miles on it to see if there's a noticeable drop in fuel economy but we've also hit winter weather here so with the extra idling it will be much harder to track for certain...
I should add I do get the cylinder 8 misfire from the CCT, but I've read without an FRx that's normal...could this be cackle? Perhaps they're onto something with an exhaust leak? I make normal boost for stock...and all the normal data monitors in forscan are unchanged from before/after the noise started...
It has 15w-40 conventional in it now...I'm switching to T6 5w-40 this weekend and attacking the glow plugs, so I'll be under the valve cover...new UVCH's going in with all new motorcraft gp's and a new motorcraft gp relay as well.
Hotshot
Joined: Dec 2012
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From: Las Cruces New Mexico
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Tuned
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Thread Starter
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Tuned
Joined: Dec 2018
Posts: 400
Likes: 68
From: Eastern shore, MD
I’ve been under it with it on the lift going over it with the transmission guy...
i will takw take a look at the EBPS values tomorrow, but that is one I already have on my monitor and I don’t recall anything abnormal in the readings...maybe if it were just barely stuck...but on a cold start the ebpv still operates...it should be a fairly cold start in a few hours so I’ll pay extra attention...
why would that “go away” shifting to reverse though?
i will takw take a look at the EBPS values tomorrow, but that is one I already have on my monitor and I don’t recall anything abnormal in the readings...maybe if it were just barely stuck...but on a cold start the ebpv still operates...it should be a fairly cold start in a few hours so I’ll pay extra attention...
why would that “go away” shifting to reverse though?
Thread Starter
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Tuned
Joined: Dec 2018
Posts: 400
Likes: 68
From: Eastern shore, MD
EBPV didn’t activate this AM as it was warmer than expected and I was plugged in...
KOEO - MAP 14.8, EBP 14.7, Baro 14.7....KOER MAP 14.8-15.0 EBP 15.1-15.7 over about a 2 minute hot idle. Average delta .2-.3 over MAP...same behavior in terms of noise disappears in reverse idle, comes back in park/N/drive idle.
Only 109k on the odometer.
KOEO - MAP 14.8, EBP 14.7, Baro 14.7....KOER MAP 14.8-15.0 EBP 15.1-15.7 over about a 2 minute hot idle. Average delta .2-.3 over MAP...same behavior in terms of noise disappears in reverse idle, comes back in park/N/drive idle.
Only 109k on the odometer.
