Whine from Radio on Startup and when gas pressed

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Whine from Radio on Startup and when gas pressed - 7/3/2007 9:02:46 AM    gcpurcell   Posts: 1 Joined: 7/3/2007 Status: offline I've just started having a whinning or buzz coming from my 03 Suburban LT.  It seems to be coming from the radio.  When I first start the car, it has a buzz in the speakers and then it quits, whether the radio is on or not.  When I turn the radio on, it comes back and is more prevelant.  The sound or speed of  the buzz goes up and down according to whether I'm pressing the gas pedal. We did just replace the fuel filter, and talk about a pain.  Whoever had the bright idea to go to the design away from the 2 nut connection, has some problems in the head.  Ended up having to cut the nipple on the filter and then was able to use the "tool" to get it out. Was also wondering if this could be related to the fuel pump.  I've read some of the other forums about the fuel pump problem.  Mine, I found it thankfully while I was at work.  If mine gets below 1/4 of a tank, it will not start back up.  Once I get the gas level over 1/4, starts up fine.  Any ideas would be greatly appreciated. Greg Post #: 1

RE: Whine from Radio on Startup and when gas pressed - 7/6/2007 8:29:09 AM    gaftop1   Posts: 9 Joined: 9/26/2006 Status: offline whine is usually a diode out in the alternator (in reply to gcpurcell) Post #: 2

RE: Whine from Radio on Startup and when gas pressed - 7/6/2007 9:13:39 AM    MalibuMaxxSS Posts: 595 Joined: 11/18/2006 Status: offline to my knowledge this is a common accurance on suburbans the fuel thing that is, all the ones I have drove besdie the newer ones die on cornering when below 1/4 tank, and wont start, if they are not level, pan in the ass.....the whine could be altenator, or bad ground the fuel pump change prolly wound not have caused it unless you clipped some stereo wires somewhere _____________________________ 2006 Malibu Maxx SS, computer Flashed, undercar LED, Cold air intake, 18' Potenzas, Limo tint front to back 1990 YJ Lifted Locked and always muddy, posi loc, 33s TSLs, weber carb. drop tailgate... (in reply to gaftop1) Post #: 3

RE: Whine from Radio on Startup and when gas pressed - 7/11/2007 6:03:27 PM    gcahal_az   Posts: 16 Joined: 2/3/2007 Status: offline Its commonly referred to as  altenator noise.  They make filters for it was well that ties into the stereo wiring i used to get this alot on my older cars.  (in reply to MalibuMaxxSS) Post #: 4

RE: Whine from Radio on Startup and when gas pressed - 7/11/2007 6:21:02 PM    golfer   Posts: 600 Joined: 10/8/2006 Status: offline You can hear this sound through the speakers when the stereo is OFF ??? For all those saying the alternator... I would like an explanation to that one. (in reply to gcahal_az) Post #: 5

RE: Whine from Radio on Startup and when gas pressed - 7/11/2007 9:26:27 PM    gcahal_az   Posts: 16 Joined: 2/3/2007 Status: offline Id love to TRY and explain it.  But i cant  I have the same thing going on in my  work van.  Its a  2001  2500.  radio off and I get a  faint  whine in the speakers.  And better yet   my nextel radio/phone makes it go crazy right before it rings.  the  altenator noise  has  something to do with the  grounding of the  stereo and speakers and crap like that.  Is it an aftermarket stereo deck?  if so id  say  put on the filter  for like 5 bucks and see what happens. (in reply to golfer) Post #: 6

RE: Whine from Radio on Startup and when gas pressed - 7/17/2007 6:32:59 PM    golfer   Posts: 600 Joined: 10/8/2006 Status: offline There are other sources of electrical noise other than  the alternator such as faulty spark plug wires  , fuel pumps and other electric motors. (in reply to gcahal_az) Post #: 7

RE: Whine from Radio on Startup and when gas pressed - 9/20/2007 1:25:15 PM    08silveradonb   Posts: 25 Joined: 9/5/2007 Status: offline i will tell you all now, this is due to a bad ground connection.  dont go get a noise filter, you need to track down the grounding points you messed with when replacing fuel filter, and make sure they are making good contact.  make sure they arent loose, or corroded.  im 99% sure that its the ground.  dont believe a noise filter will fix the problem, not only that why go spend money, if all it takes is a wrench (i assume you already have that)? (in reply to golfer) Post #: 8

RE: Whine from Radio on Startup and when gas pressed - 9/23/2007 4:42:38 PM    350Suburban   Posts: 10 Joined: 7/4/2007 Status: offline Does this happen on am or fm stations? (in reply to gcpurcell) Post #: 9

RE: Whine from Radio on Startup and when gas pressed - 9/24/2007 8:07:14 AM    golfer   Posts: 600 Joined: 10/8/2006 Status: offline quote: ORIGINAL: 350Suburban Does this happen on am or fm stations? The claim is it can happen with the radio off. (in reply to 350Suburban) Post #: 10

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