EcoDiesel Engine Chirping Noise

[FinnCustomKnives]

One of you needs to get this on video if possible. I haven't notice anything of the sort but am curious now

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[Petey]

Only chirping I've ever been familiar with in association with diesels has to do with the fan belt. My understanding was that upon shutdown, the engine stops so abruptly, that the belt skips/slides over one of the pulleys.

So to me when I read the thread topic it reminded me of that and I wondered if it might be something similar. All that torque being pumped out and then one of the engine components connected by pulley gets to far out of sync RPM wise.

Just a theory....perhaps a bad one....

I agree it might be a belt these do increase in noise frequency over time.

 

[Petey]

Sitting stopped and at an idle, mine has a sound like a cat meow-ing under the hood...LOL. My wife says "there's that cat again"...

maybe u have a very finely tuned engine and it purrs too.

 

[Willys53]

it is not a belt or turbo spooling down. This is after being stopped for a while at a red light or similar

 

[G0nBr0ke]

I hear it when lightly accelerating and cruising up to 30 mph. Above 30-35 mph I don't hear as much due to wind / road / tire noise.

I think you could be hearing the intake suck air. This is more noticeable on low rpms and momentary when accelerating. I get it on multiple vehicles, it is more pronounced with cold air intakes but can happen with the factory airbox at the air inlet opening especially with a turbo diesel.

 

[SolarWizard]

Mine sounds like field full of crickets in the summer under light or medium throttle t
between 10 and 35mph.

does that sound similar?

 

[Tredsdert]

I think you could be hearing the intake suck air. This is more noticeable on low rpms and momentary when accelerating. I get it on multiple vehicles, it is more pronounced with cold air intakes but can happen with the factory airbox at the air inlet opening especially with a turbo diesel.

Same, my wife's Subaru Forester with it's Flat-4 chirps like a cricket at idle and when going 35mph and below. I thought it was the fan scuffing or a belt or something, but it comes from the intake. It used to bug the heck outta me, but the Subi's intake is more like a CAI, and it chirps like a MFer when it sucks air in a low speeds and idle.

Nothing to do about it but drive faster for longer.

 

[DMT]

All those mystic sounds on and off were since new and i am slowly getting used to. Its totally different rhythm and throttle vs gas engines. Cats and crickets.

 

[Caseman2]

Anyone else have this issue? It's weird not everyone hears it.

 

[SolarWizard]

still Sounds like a field full of crickets on mine.
based on the overal performance and mpg on my Jeep I’d say it’s probably supposed to be that way

 

[Compression-Ignition]

I swear most of you are describing different noises.

For me a couple months ago I was testing the manual mode and wanted to see if they had designed any braking into this thing. To my surprise the manual mode works great to slow your vehicle. Like really really good. We have a really steep new road they put in near me average of about 8%, but probably 12+% in spots. Anyhow I had to really get aggressive with the downshifting, but once those rpms got up there and it was yelling at me pretty good, it started braking pretty hard. And right then....is when I noticed my very first chirp. Which is absolutely the belt slipping BTW.

So I can't speak to what everyone's noise is, but anyone complaining of a chirp that has any sort of relation to letting off the throttle or slowing down, that's what it is. And it is a normal thing. I did find it odd that it wasn't until I did this 'test', that I developed the chirp. Happens all the time now when I let off the throttle. Non issue.

Only chirping I've ever been familiar with in association with diesels has to do with the fan belt. My understanding was that upon shutdown, the engine stops so abruptly, that the belt skips/slides over one of the pulleys.

So to me when I read the thread topic it reminded me of that and I wondered if it might be something similar. All that torque being pumped out and then one of the engine components connected by pulley gets to far out of sync RPM wise.

Just a theory....perhaps a bad one....

 

[Kevinfinni]

I hear it when lightly accelerating and cruising up to 30 mph. Above 30-35 mph I don't hear as much due to wind / road / tire noise.

My 2021 turbo diesel JL has that fain chripping noise also. On light acceleration plus or -30 mph I have no idea where it’s coming from or what’s causing it

 

[Caseman2]

Yes that's definitely the same as mine. I had them look at it and the tech said he can hear it, but feels it's normal.

The normal Diesel tech was on vacation and there was no diesel wranglers on the lot to compare to.

 

[Aaronfoster4673]

it is not a belt or turbo spooling down. This is after being stopped for a while at a red light or similar

Ok i have the 3.6l gas. Ive owned 6 diesels, so i do understand them and how they operate. I dont believe its actually engine based considering i have the identical issues on my engine. I noticed it for the first time going through my neighborhood. I immediately thought wheels and tire area. Possibly brakes as it sped up and slowed down, but as i came to a complete stop the issue didnt. I tried to listen with the hood open but of course it stopped right as i got under the hood. I believe its a belt or pulley related. 2021 gladiator mojave. 3500miles

 

[nsa250x]

I finally took my Wrangler to the shop. The diesel technician heard the noise and said it’s normal for the EcoDiesel engine.

my Wrangler runs great. 15k miles on it without any problems.

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