Ford Ranger Forum - Forums for Ford Ranger enthusiasts!

Go Back   Ford Ranger Forum - Forums for Ford Ranger enthusiasts! > > >
Forgot Password? Join Us!

Welcome to Ford Ranger Forum

Reply
 
Thread Tools Search this Thread

  #1  
Old 11-16-2009, 04:30 AM
4x4man 4x4man is offline
Learning to use the forums
 
Join Date: Nov 2009
Posts: 3
Default MAF trouble

I recently purchase a 1999 Ranger 4X4 with 78,000 original miles. It was sitting at idle for 10 minutes when the MAF started making a whrrrrring noise. I thought first a plugged air filter, but no it was new.
Has anyone experienced this before? Why would the MAF make a noise like that?
Reply With Quote
  #2  
Old 11-16-2009, 05:45 AM
Jay FX4 Jay FX4 is offline
▲▼▲▼▲▼▲▼
 
Join Date: Jun 2009
Posts: 2,511
Default

I was not aware that a little electronic sensor was capable of producing sound.
How did you come to the conclusion that that's where the sound was coming from? Are you certain that it wasn't simply your fan turning on?

Also, did the truck run any differently once the sound started?
__________________
Quote:
Originally Posted by Ranger Dave (B25) View Post
Our foreign policy is laughable at best. As is the recipient of this years Cracker-Jacks prize for 'peace.'
Quote:
Originally Posted by Toms984x4 View Post
NOS for teh horse powaz!!!
ɹǝʌo ǝɯ dılɟ
Reply With Quote
  #3  
Old 11-16-2009, 06:46 PM
4x4man 4x4man is offline
Learning to use the forums
 
Join Date: Nov 2009
Posts: 3
Default

I put my ear to it while it was happening. Fan is mechanical, not electric so Im sure its not the problem. Alternator is behind it but noise was prominent at the MAF.

truck always runs OK, with noise or without
Reply With Quote
  #4  
Old 10-19-2010, 05:52 AM
MAK MAK is offline
Learning to use the forums
 
Join Date: Oct 2010
Posts: 14
Default Re: MAF trouble

My MAF makes this noise as well. Only when it's cold out as it only happens when I turn the heater on. I'm not 100% sure it's the MAF though. I don't see how this sensor with two little electrical elements can make this noise either. As it's starting to get colder I'll try and narrow it down. It's always happened while I'm driving and I haven't had the oportunity to pull over to figure it out. It only happens at low air flow, when slowing down or stopped at a light. It doesn't happen right off, the engine needs to be warm, heater on and letting off the gas for what ever reason. It's a loud horn type noise which I call a Moose call. It's like someone is under the hood with an Oboe and playing a single note....loudly.
__________________
2000, 4x4, 4.0 Ext cab
Reply With Quote
  #5  
Old 10-19-2010, 06:00 AM
MAK MAK is offline
Learning to use the forums
 
Join Date: Oct 2010
Posts: 14
Default Re: MAF trouble

I've also got an aftermaket K&N filter and intake kit installed and no it's not a clogged filter either, I just cleaned it 2-weeks ago, along with the MAF. I took the MAF apart and cleaned it with CRC. If a new MAF wasn't so expensive I would have thrown one in already + Advance Auto has to order it, none in stock, I checked. Plus I want to be sure it's the culprit before I throw $100 bucks at the issue. Rather embarrassing when I'm coming through the gate and this thing decides to play a tune for all to hear....and I mean all to hear. You can hear this thing from 100 yrds away. No ill effect to the vehicle at all, or at least there is nothing noticable...aside from the LOUD noise.
__________________
2000, 4x4, 4.0 Ext cab
Reply With Quote
  #6  
Old 10-19-2010, 11:19 AM
modelageek modelageek is offline
Ford Ranger Driver
 
Join Date: Jan 2009
Posts: 6,257
Default Re: MAF trouble

I have heard of the IACV making a whirning sound
__________________
2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
Reply With Quote
  #7  
Old 10-19-2010, 12:02 PM
FireRanger FireRanger is offline
Blinded by the light
 
Join Date: Sep 2009
Posts: 7,674
Send a message via AIM to FireRanger
Default Re: MAF trouble

It isn't the MAF. It is the 4 Liter Moose Call. Caused by a dirty IAC. Remove, clean the IAC and the passages on the intake. Reinstall. Moose will go away.
__________________
(Formerly)
FireRanger
2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
Reply With Quote
  #8  
Old 10-20-2010, 04:47 AM
MAK MAK is offline
Learning to use the forums
 
Join Date: Oct 2010
Posts: 14
Default Re: MAF trouble

LOL, Moose will go away huh? Actually I did clean it yesterday after reading a bunch more threads and someone else recommended cleaning the Idle Air Control (IAC) Valve. Like I said, it only happens when it's cold so I'll have to wait and see if that was it. It was a little cold this morning and I heard a couple little call's from the Moose but nothing like it was. Lot's of deposits in the IAC that the cleaner (CRC) didn't remove. If it does come back I'll change the IAC before I change anything else. The reason people (not just me) look to the MAF first is the sound resinates down the intake duct and comes out the filter area, which is right where the MAF is. Thanks to everyone on here as the networking does help. I would have never thought to clean the IAC, nore did I know I had one....LOL. Wonder what else I got that I don't know about.... :-)
__________________
2000, 4x4, 4.0 Ext cab
Reply With Quote
  #9  
Old 10-20-2010, 01:04 PM
Solo V8 4G Solo V8 4G is offline
Life is like skid marks
 
Join Date: Oct 2010
Posts: 139
Default Re: MAF trouble

Something else that can cause the noise would be the PCV hose on the back side of the intake, the rubber gets soggy and pinched.
__________________
98 Ranger, Bagged 2600's in the front, 2500's in the rear. 3 Gal tank. DJM Upper and Lower control arms. 2 Thomas Compressors (garbage). 4 linked rear with C-notch. All (except cab) fiberglass. Custom Tribal Paint (soon to be Sunburst/burnt Orange).
Coming soon - 405HP 4.6L (SOHC), 4R70W
Reply With Quote
  #10  
Old 10-24-2010, 01:21 AM
Coleosis Coleosis is offline
The Sickest
 
Join Date: Jun 2009
Posts: 451
Default Re: MAF trouble

I saw this writeup on cleaning the maf...

http://www.explorer4x4.com/iac.htm


Do I really have to remove this whole piece (assuming its the throttle body) or can I just take the black part off?
__________________
Quote:
Originally Posted by 05RangerEdge View Post
Nobody won here today but I am pretty sure you just lost.
Reply With Quote
  #11  
Old 10-24-2010, 02:04 AM
modelageek modelageek is offline
Ford Ranger Driver
 
Join Date: Jan 2009
Posts: 6,257
Default Re: MAF trouble

just take the black part off. most of the time the 2 screws are blind torx screws. sometimes you can just use a pair of pliers. you can try cleaning the wire on the maf first with a can of maf cleaner $6
__________________
2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
Reply With Quote
  #12  
Old 10-27-2010, 08:22 AM
MAK MAK is offline
Learning to use the forums
 
Join Date: Oct 2010
Posts: 14
Default Re: MAF trouble

Be carefull with the two elements in the sensor though....a new MAF is right at $100 bucks.
__________________
2000, 4x4, 4.0 Ext cab
Reply With Quote
  #13  
Old 10-28-2010, 11:31 AM
Solo V8 4G Solo V8 4G is offline
Life is like skid marks
 
Join Date: Oct 2010
Posts: 139
Default Re: MAF trouble

Quote:
Originally Posted by mak View Post
be carefull with the two elements in the sensor though....a new maf is right at $100 bucks.
also watch the seal between the maf and the airbox
__________________
98 Ranger, Bagged 2600's in the front, 2500's in the rear. 3 Gal tank. DJM Upper and Lower control arms. 2 Thomas Compressors (garbage). 4 linked rear with C-notch. All (except cab) fiberglass. Custom Tribal Paint (soon to be Sunburst/burnt Orange).
Coming soon - 405HP 4.6L (SOHC), 4R70W
Reply With Quote
  #14  
Old 10-30-2010, 02:24 AM
Coleosis Coleosis is offline
The Sickest
 
Join Date: Jun 2009
Posts: 451
Default Re: MAF trouble

Thanks guys...Was gonna do this wed, but had to repack the wheel bearings and pulled a muscle in my shoulder so I didnt wanna do anything but lay down after I got the hubs back on it. will definitely be careful when removing it.
__________________
Quote:
Originally Posted by 05RangerEdge View Post
Nobody won here today but I am pretty sure you just lost.
Reply With Quote
  #15  
Old 11-08-2010, 04:39 PM
turner24 turner24 is offline
Like the Forums
 
Join Date: Feb 2010
Posts: 35
Thumbs up Re: MAF trouble

My ranger must be in rut season as my air filter has had the moose call for quiet sometime now. It was doing it a lot this summer and has slowed down a bit, but man is that sound annoying! It would only make the noise while idling and I could sometimes make it go away by adjusting the A/C. My check engine light indicator is on as well, but the error codes come up as bad oxygen sensors. Is there a chance that it could just be the MAF needs cleaned and the oxygen sensor codes are a false alarm?

After reading this thread I'm going to try and clean the MAF and IACV!

Thanks Guys.
__________________
1999 Ford Ranger
XLT 4x4 Ext. Cab
V6 4.0
133,000 Miles
Burgundy
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Using tow straps: Am I asking for trouble? 02Edge General Ford Ranger Discussion 24 01-25-2011 07:16 PM
having some trouble 94ranger3.0 3.0 Vulcan Tech 21 12-22-2009 08:46 PM
maf to computer trouble? oldfordisbetter 4.0 SOHC / 4.0 OHV Tech 3 11-14-2009 10:19 PM
V6 in trouble Sifurich 4.0 SOHC / 4.0 OHV Tech 4 07-18-2009 08:51 AM
A/C Trouble Draco General Ford Ranger Discussion 1 07-09-2009 02:38 PM