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Ford Explorer Maintenance and Repair

6385 messages,  Last post on May 05, 2013 at 7:47 AM

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Messages Page 567 of 639

#5658 of 6385 Re: 99 explorer has howling noise from engine when cold [atlantis2] by tfmr

Jan 20, 2007 (4:59 pm)

Replying to: atlantis2 (Jan 20, 2007 9:23 am)
I have a very similar problem with my new 2006 Ford Explorer, 4.0L engine, with only 7500 miles on it. At around 4000 miles I started to hear a squealing noise coming from the engine when I accelerate above 2000 rpm and the noise continues to 3100 rpm. Below this rpm it is smooth and quiet. When the gear changes (at > 3000 rpm) from 4th to 5th or from 2nd to 3rd, the whistling goes away immediately. When I press on the gas to raise the rpm back to around 3000 rpm, which shifts it down one gear, the noise returns until the rpm increases above 3000 rpm when the gear shifts to the next higher, rpm goes down and noise immediately fades out.
 
I must add that this whistling noise can be heard clearly when the outside temperature is cold. The squeal disappears when the outside temperature is above 80 degrees. When the outside temperature drops, the squeal returns.
 
I am suspecting a bad Mass Airflow Sensor. Hope someone here can give some hints as to what could be the culprit.

#5659 of 6385 Axle lubricant catch-22? by scottsplace

Jan 21, 2007 (12:04 am)

I have a 1998 5.0L/AWD with 160K miles, and I've never changed the axle lubricant. The service guide states:
  Rear axles containing synthetic lubricant are lubricated for life. These lubricants are not to be checked or changed...
 
Rear axles containing non-synthetic lubricant must be changed every 100,000 miles...
 
So, if I can't check the lubricant, how do I know if it's synthetic? And what about the front axle?
 
Note that the axle has not been submerged, nor trailers towed. The vehicle has been virtually trouble free.
 
Thanks for any useful suggestions.

#5660 of 6385 Re: More bad gas mileage... [96mk8lsc] by tfmr

Jan 21, 2007 (4:38 am)

Replying to: 96mk8lsc (May 18, 2004 6:11 am)
I have a very similar problem with my new 2006 Ford Explorer, 4.0L engine, with only 7500 miles on it. At around 4000 miles I started to hear a whistle/squeal noise coming from the engine when I accelerate above 2000 rpm and the noise continues to 3100 rpm. Below this rpm it is smooth and quiet. When the gear changes (at > 3000 rpm) from 4th to 5th or from 2nd to 3rd, the whistling goes away immediately. When I press on the gas to raise the rpm back to around 3000 rpm, which shifts it down one gear, the noise returns until the rpm increases above 3000 rpm when the gear shifts to the next higher, rpm goes down and noise immediately fades out.
  
I must add that this whistling noise can be heard clearly when the outside temperature is cold. The squeal disappears when the outside temperature is above 80 degrees. When the outside temperature drops, the squeal returns.
  
I am suspecting a bad Mass Airflow Sensor. What did you find out in your case?

#5661 of 6385 Re: ABS and Airbag Light On [ryana97] by nvbanker

Jan 21, 2007 (9:41 am)

Replying to: ryana97 (Jan 18, 2007 7:13 am)
Could be a pending BCM failure, which you do not want to have to fix. But it also could just be a random power surge. If it does it again, reboot the car (disconnect the battery, and reconnect after a minute) and see if that fixes it.

#5662 of 6385 Re: 99 explorer has howling noise from engine when cold [tfmr] by 70ss454_man

Jan 21, 2007 (3:28 pm)

Replying to: tfmr (Jan 20, 2007 4:59 pm)
I had the mass air flow sensor fail on an older model explorer, and when they go, the vehicle is undriveable. If your mass air flow sensor was bad, you would be blowing black and the engine would fight to stay running.
~tom

#5663 of 6385 Re: 99 explorer has howling noise from engine when cold [tfmr] by 70ss454_man

Jan 21, 2007 (7:28 pm)

Replying to: tfmr (Jan 20, 2007 4:59 pm)
it could be your transmission howling. they tend to do this when either the fluid is sludgy or is low. my explorer did this now that i think about it and i had it flushed and the noise went away instantly and hasnt done it since.
~tom

#5664 of 6385 Re: 99 explorer has howling noise from engine when cold [70ss454_man] by tfmr

Jan 22, 2007 (2:34 am)

Replying to: 70ss454_man (Jan 21, 2007 7:28 pm)
Thanks Tom, but I changed my transmission fluid (needed 5 bottles of it),and no change. The strange thing is that is only whistles in the winter season when the outside temperature drops. In the summer you can't hear it.

#5665 of 6385 Re: ABS and Airbag Light On [nvbanker] by ryana97

Jan 22, 2007 (5:38 am)

Replying to: nvbanker (Jan 21, 2007 9:41 am)
Actually it happened again this morning. Outside temperature around 19F. This time the ABS light was on first then the ABS light came an and stayed on even when all of the various heater functions pressed. Even in the defroster mode the fan is not coming on until I actually adjusted the fan speed on the heater then the lights went off. Thank you, I will try to reboot the car. The car is under an extended warranty do you know of any TSB to mention to the dealer when I bring it in?

#5666 of 6385 Re: 99 explorer has howling noise from engine when cold [tfmr] by 70ss454_man

Jan 22, 2007 (10:06 am)

Replying to: tfmr (Jan 22, 2007 2:34 am)
Hmmm...that is strange.
Have you taken it into a mechanic or the dealer?
~tom

#5667 of 6385 Re: 99 explorer has howling noise from engine when cold [70ss454_man] by ryana97

Jan 22, 2007 (10:36 am)

Replying to: 70ss454_man (Jan 22, 2007 10:06 am)
I'm planning on taking it to the dealer this weekend. Just trying to get some background info. You know how dealers are, if it doesn't happen for them while it is in the shop then the problem doesn't exist. Also, no codes have flashed.

Messages Page 567 of 639

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