Buzzing noise while accelerating

[spreilly305]

I’ve got this odd noise coming from what seems like the front passenger side of the vehicle under the hood or behind the dash. Check out the video. I can’t seem to figure out the source. When I hit about 30mph and let off the gas, the sounds clicks a few times then stops. It continues when I accelerate again. It doesn’t matter what speed I am at. From a crawl to 70mph. Anyone have any ideas or experience with this? 2019 Ranger XL SuperCrew STX with 43k on the odometer.

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[airline tech]

Motor Mount is a high probability:

Set parking brake and hold foot on brake:
Place in Drive and give it some gas to load the engine and let off, is the noise present - As engine settles , unloads?

 

[spreilly305]

Motor Mount is a high probability:

Set parking brake and hold foot on brake:
Place in Drive and give it some gas to load the engine and let off, is the noise present - As engine settles , unloads?

Negative. Sound is only there when I’m pressing the gas. Sound clicks once or twice and then it abruptly stops. Doesn’t sound like it speeds up and then slows down. It almost sounds electrical

 

[airline tech]

From the video - I hear (2-Clicks) when you are on the pedal - (Timed Perfectly) with gear shifting.
As though it appears.


Possible #1 -The engine is (Rocking) in those shifts and transmitting that rocking back to the transmission, the transmission movement is causing the (Gear Shift) lever to rock as well (Plastic-Noise) This has nothing to do with engine speed, it's about the load applied when you are On and Off the gas pedal and the natural rocking motion of the engine during shifts.

Possible #2 - some owners have had a noise from the accelerator pedal (internal spring) return of the pedal - as it is a (Electric Pedal) the return spring is internal.

Possible #3 - some owners have had a clicking noise from the TRM - (Trailer Module) mounted on the Pass side (Kick Panel) but I think this was only when hitting the brake pedal.

Possible #4 - Something in the suspension as the engine loads up and settles with the shifts.
Test by pulling up and pushing down on the front corners

 

[airline tech]

To eliminate the Drive Line - (Front CV Shafts) Loading and Unloading (Noise) or the Rear Driveshaft (Noise)

Try the Test I posted for the Motor Mounts except also do it in (Reverse)
If the noise is not noted, then jack up the front end and grab each wheel and rock it (Ft to Back)
Is the noise noted?
For a bad CV-Shaft you would also be able to get into an open parking lot and get into hard turns (is there a clicking noise noted)?

The Rear Shaft - I think is ok, whatever the noise is (Its Load related) and movement of the engine and related components and the most likely here is a worn motor mount and this is an easy test (To Eliminate) diagnostic step.

 

[airline tech]

I have one other Possible and that is the - Brake Shift Interlock - Clicking.
This prevents the shifter from being pulled out of park unless you hit the brake.
Are you noticing any different feeling and any difficulty getting the truck out of park.

Just press the Brake Pedal - You will hear the click (the interlock actuator releasing), does the sound match what you are hearing when driving?
If so, then the (Engine Load) is tweaking the shifter just enough to trigger the shifter to think the brake pedal is being pressed and the actuator is cycling.

Be it a bad switch or wiring related or a mis-adjusted shifter cable

I think I have covered all possibilities, just a process of elimination on which one it is.

You could possibly do the (Motor Mount) test and either hold your hand on the shifter (mainly the button) do you feel any vibration and or a mechanics stethoscope and listen for any noise in the shifter assembly when this noise is happening as I feel that is where the noise is coming from when the engine is loaded up and or rocking.

 

[airline tech]

The more I listen to the video; I am near certain it's the - Brake Shift Interlock and you have a short that is picking up (Up-Shifts) somehow. Pay attention to this as I only have the short video but is it perfectly timed for all gear upshifts?
If yes, then somehow the - Brake Shift Interlock is picking up the (Shift Pulse) and shorting over to the Interlock circuit - (Simulating the same as if the Brake Pedal was Pressed)

Now if this is timed perfectly to the (Shift) then the circuit has short as I am only hearing (One) shift
If this is just intermittent not dependent on (Shift) then the issue is only with the (Interlock) circuit.
And will it do the same (easing) into the throttle?

Only Follow this path if you can CONFIRM that my suspect issue is correct, as this may involve a deep wire harness open up to find where these wires a cross shorted, but I would do a good wiring check to confirm it is not the Selector Lever itself before tearing into the harness.

With Connector Connected:
To isolate backprobe Pin #5 and Pin #6 separately when you press the brake pedal, are you reading a power pulse on either pin.
If yes,
Repeat the same with the connector disconnected - Same results (Yes- it's the wiring)
No (It's the Selector Lever)

Shift Lever (Assembly) Side of the connector.
Another confirmation of the (No) Ohm between Pins 5 & 12 & Pins 6 & 12 - Should read (Open)
If you read resistance, then the Shift Lever is shorted internally.

Now this is if I am correct on my assessment that the Interlock Actuator (Quick Cycles) and it is timed with the (Up-Shifts)

I suspect that (Wire #5) SST-U (Select Shift Up) when it power pulses (the upshift) it is bleeding over to (Wire #12) and momentary pulsing the (Power) to the Shift Interlock (The Double Click)
Pulse power to release and then power drops and then it cycles to norm position.

For Ref: (Wire 6 = SST-D) Downshift

Shift Lever Connector:

 

[seasprite]

The only time I would hear a similar click on mine would be when the outside temps are pretty cold and the transmission was cold. For the first couple of shifts I could hear what sounds like a solenoid clicking. Only did this until the truck went through the first shifts of the day then never again until the next morning.
My thoughts are this the solenoids in the transmission I'm hearing until the fluid gets warm enough to get were it needs to be.
I've been using the remote start a lot more this year and have not had the clicking yet this year.

Does your truck only do this when cold or all the time?

Well after rereading your post I don't think you have the same thing. Haven't had my coffee yet

 

[airline tech]

Had to make a run this AM, recorded my Interlock and although the noise is very similar the OP’s is much louder and deeper sound - so I think I will say that’s not the issue - but it is very close to the sound it makes. So I am back to a Motor or Transmission mount movement, my original thought.

 

[spreilly305]

From the video - I hear (2-Clicks) when you are on the pedal - (Timed Perfectly) with gear shifting.
As though it appears.


Possible #1 -The engine is (Rocking) in those shifts and transmitting that rocking back to the transmission, the transmission movement is causing the (Gear Shift) lever to rock as well (Plastic-Noise) This has nothing to do with engine speed, it's about the load applied when you are On and Off the gas pedal and the natural rocking motion of the engine during shifts.

Possible #2 - some owners have had a noise from the accelerator pedal (internal spring) return of the pedal - as it is a (Electric Pedal) the return spring is internal.

Possible #3 - some owners have had a clicking noise from the TRM - (Trailer Module) mounted on the Pass side (Kick Panel) but I think this was only when hitting the brake pedal.

Possible #4 - Something in the suspension as the engine loads up and settles with the shifts.
Test by pulling up and pushing down on the front corner

thanks I’ll definitely check these possibilities out. Someone else has said that it could be throttle control and something to do with the direct injection? Not really sure how I would check this.

 

[spreilly305]

This is really detailed and I really appreciate that. Definitely beyond my capabilities and knowledge but I’m going to print this and share it with my mechanic to see if he can do some investigations based on this. Really appreciate everyone’s input!!!

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