strange noise
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More Turbo
Joined: Dec 2004
Posts: 527
Likes: 6
From: Jamestown Tn
strange noise
I have this noise i hear when i shut down the engine. Its like a banging like motor mount rattle type. It will also do it when idleing sometimes. It dosent make the noise when its cold. I removed the intake pipe and verified it wasnt rattling on anything. this all takes place on the drivers side. It almost sounds like a lood manifold. Another thing is my pyro meter is not reading right since the noise started. I just replace the amp box on it last week thinking it was bad. (isspro)Even at idle i read 0 only when i get going down the road will the meter get up to temp. Another thing is after getting off ramp on intersate doing 80 mph, the egt will go to 0 when at the bottom of ramp. Also when i get going all is quiet and runs fine. I sorta think there is a manifold leak or loose something like that. How can i check for this? or maybe they uppipe is loose. I do have the bellowed up pipes also. any help is great, im baffled ... Jeff
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Joined: Mar 2015
Posts: 5,277
Likes: 32
From: Blairsville, Pennsylvania
Taking a stab at this, I'd start looking at electrical.
Even if the manifold leaks or a cylinder stops firing, the Pyro should still not be zero. What is the range of your sensor? Maybe it is just below that range?
If the temp is below the range, maybe your UVCH is dying and stopping the driver's side from firing, causing the EGT to drop below the sensor's bottom value?
Other than that, maybe electrical is dropping out, affecting your pyro? Do you have a mechanical or digital gauge? Any way to tell if it is still being powered when reading zero?
When it is at zero, try shooting the manifold near the sensor with IR gun, see what it actually is?
There is also a possibility that the tip broke off your EGT sensor or it is damaged in some other way.
Those are the things I would be looking at first to narrow it down.
Good luck! Hope it is something "minor"
Even if the manifold leaks or a cylinder stops firing, the Pyro should still not be zero. What is the range of your sensor? Maybe it is just below that range?
If the temp is below the range, maybe your UVCH is dying and stopping the driver's side from firing, causing the EGT to drop below the sensor's bottom value?
Other than that, maybe electrical is dropping out, affecting your pyro? Do you have a mechanical or digital gauge? Any way to tell if it is still being powered when reading zero?
When it is at zero, try shooting the manifold near the sensor with IR gun, see what it actually is?
There is also a possibility that the tip broke off your EGT sensor or it is damaged in some other way.
Those are the things I would be looking at first to narrow it down.
Good luck! Hope it is something "minor"
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More Turbo
Joined: Dec 2004
Posts: 527
Likes: 6
From: Jamestown Tn
yes i was suspecting the thermocouple as well could be bad. I was thing of a new guage one of the EV 2 isspro makes. Then i still have the strange noise when it shuts down. thanks Jeff
Post Fiend
Joined: Mar 2015
Posts: 5,277
Likes: 32
From: Blairsville, Pennsylvania
If the tip is broken off the sensor, it might be in the system somewhere?
I hope not, it could be trouble. If your sensor isn't rusted too bad and can be accessed easily, might be important to check it pretty quickly- just to be sure
Worst case, it could be in the turbo, in the piston, making noises, etc. Unlikely, but worth ruling out
I hope not, it could be trouble. If your sensor isn't rusted too bad and can be accessed easily, might be important to check it pretty quickly- just to be sure
Worst case, it could be in the turbo, in the piston, making noises, etc. Unlikely, but worth ruling out
Fleet Mechanic
Joined: Aug 2006
Posts: 1,465
Likes: 17
From: Jacksonville, FL
Is your thermocouple still in its housing? If it may have fallen out it wouldn't read ambient (not high enough) plus you have a small hole there for an exhaust leak. Just spitballing......
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
I have pyrometer from Autometer and my gauge readings started bouncing all over the place. The problem turned out to be the gauge itself went bad. I had sent it back to them for repair but they couldn't fix it. They did sell me a new one at a very good price though.
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dstarrington
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Apr 28, 2004 08:00 PM
