Question about 2004 Ford Mustang

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Engine Noise I have a 2004 Mustang GT and when I turned the engine on the "Service Engine Light" came on and it started making a dull whistling sound whenever I hit 1500-1800 RPM range. I have no clue at all where exactly it is coming from...

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  • Junior86 Sep 18, 2008

    I also noticed that when I go to start the engine the first time I crank it, it will begin to start and give a gurgle sound as if it was on but won't start up completely then I will let off of it and try again and that second time it will start as soon as I turn it over it will start. It never has done that before, does that single any thing out? Thanks for the help!

  • Junior86 Sep 18, 2008

    So this morning I popped my hood to check for a loose line again or anything out of the ordinary and I checked all of my fluids and my coolant was down a lot from the night before but there were no leaks on the hoses or spots on the ground. Any ideas?

  • Junior86 Sep 20, 2008

    I finally got the code off of the obd and it gave me P0340 - Camshaft sensor. Does that mean that there is a sensor going to the camshaft that went bad or that the camshaft itself is messing up?

  • Anonymous Jan 08, 2009

    camshaft sensor position

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I think its one of your pullys that is bad and it resulted in having you sensor going out. Domino effect.

Posted on Jul 22, 2009

  • ramirez_rp Jul 22, 2009

    it just happened to my 03 i have about 93k and It was doing that when i hit around 40- 50 and when im about to stop at a light it will make that squeky sound and shut off periodically. I thought it was the pully on the alternator so i took it off and it test bad but when i had it replaced it still made noise like i said domino affect. I trying to find out which pully

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  • Ford Master
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It sounds like it may be a vacuum line that is loose. Check carefully for a loose hose, and check for codes since your engine service light is on. It's probably on because of the vacuum line. Can't really tell u much more w/ no other clues. Trouble code might give u some idea where vac. line is. good luck countrycurt0

Posted on Sep 18, 2008

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  • Curt Downs Sep 18, 2008

    Sorry jr86, that doesn't rattle any new ideas loose in my brain, although it is probably all connected. One possible idea, can you push down on the gas pedal in park/neutral and get the rpms up to 15-1800, will it make the whistling noise while the car is not moving? If so,have someone maintain the rpm's so u can hunt around for the source of the noise. One trick that has worked for me a couple of times is to try and narrow down the area where the noise might be, and give a small area a real heavy dose (spray) of WD-40, or something similar. If you shoot a heavy enough spray on the vacuum leak (if that's what it is) it should quiet it down briefly. This works best on small leaks, yours may be a big one. The spray just 'seals' up the leak very briefly. It just might help u narrow down where it's located. Don't use anything flammable, the WD-40 won't harm anything. And go get that engine code from auto zone or somewhere if u can. That would be the clue u need. Keep me posted! countrycurt0


  • Curt Downs Sep 18, 2008

    I'm out of ideas. If you have any other symptoms let me know. We need that engine code.countrycurt0

  • Curt Downs Sep 20, 2008

    Ok jr86, the camshaft position sensor circuit malfunction can be several things.
    -a wire or connector in the circuit could be grounded or shorted or broken
    -The power control module may have failed (expensive)
    -there's a open circuit
    -the crankshaft position sensor may have failed
    - the camshaft position sensor may have failed

    Do u have or can u get a multimeter to test the system?
    u should check all the wiring and connections in the circuit (eyeball them to look for broken, disconnected, etc.)
    check for continuity in circuit wiring ( w/ multimeter)
    check the voltage of the camshaft position sensor ( w/ multimeter)
    also check the crankshaft position sensor if u haven't found anything wrong above.
    powertrain control module is last thing to replace, as it's expensive. U should make sure everything else is ok before replacing it. good luck, let me know what u find. PS I'll be away for about 10 days- so it may be awhile before I can get back to you. countrycurt0


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