during hard acceleratioin the engine makes a horn type sound - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 07-18-2009, 11:39 AM Thread Starter
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during hard acceleratioin the engine makes a horn type sound

While driving under a hard acceleration the engine makes a horn type sound like air escaping from somewhere. Onl;y does it while driving not while in park. I checked the soft hoses attaching all the aluminum tubes the seem to be ok where do i go from here?
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post #2 of 12 Old 07-18-2009, 11:47 AM
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Could be a loose, leaking, or blown off intercooler boot and/or possibly your wastegate opening. Do you have a boost gauge installed so you are able to monitor at what boost level the noise starts? Are you experiencing any power loos?

Bill

2003 F250 Superduty XLT:

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post #3 of 12 Old 07-18-2009, 12:03 PM Thread Starter
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first thanks for replying. I dont have a boost gauge as for power loss its seems minimal I checked the boots at the top of the engine and at the intercooler they seem to be ok
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post #4 of 12 Old 07-18-2009, 12:08 PM Thread Starter
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its definatly when under greater boost pressure it happens around 2000-2500 rpms but oonly wtih hard acceleration not in park or normal driving
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post #5 of 12 Old 07-18-2009, 12:14 PM
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Quote:
Originally Posted by cousinkevin View Post
its definatly when under greater boost pressure it happens around 2000-2500 rpms but oonly wtih hard acceleration not in park or normal driving
Are you running a chip or tuner?

It might be a good idea to create a signature with your mods/upgrades. Other ORG members will be more willing to respond to your post if they know a little more about your truck.

Bill

2003 F250 Superduty XLT:

7.3L Powerstroke
TS Performance 6 Position Flip Chip
Eighteen K Power Module
DFUSER MAP-Maximizer
Turbo Master Wastegate Controller
Borg Warner Compressor Wheel
FASS Fuel Pump
FASS Suction Tube
GDS FUEL PRESSURE SPRING
AIH Delete W/Boost Fitting
Sonnax Shift Kit
DIY Big Air Filter
4" Magnaflow Turbo Back SS Exhaust
AutoMeter Ultra-Lite Gauges
6" Suspension Lift
35" Tires

45 Auto
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post #6 of 12 Old 07-18-2009, 12:24 PM Thread Starter
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Thanks again I just signed up[ for this site about an hour ago gonna put up info when i figure it out! no tuner or chip just a stock truck for most part
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post #7 of 12 Old 07-18-2009, 12:47 PM
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Quote:
Originally Posted by cousinkevin View Post
Thanks again I just signed up[ for this site about an hour ago gonna put up info when i figure it out! no tuner or chip just a stock truck for most part
Check your MAP Sensor hose for leaks, blockage, or disconnection. How old is your oil? Old oil or the wrong oil can cause poor injector performance. Refer to your manual for the correct application. I would check air intake filter is clean and intake system for restrictions. Also I would check the fuel filter to make sure it is clean.

If you do not know when these items were serviced last I would consider doing a basic tune-up.

You can further diagnose the problem once these ares of concern have been eliminated.

Bill

2003 F250 Superduty XLT:

7.3L Powerstroke
TS Performance 6 Position Flip Chip
Eighteen K Power Module
DFUSER MAP-Maximizer
Turbo Master Wastegate Controller
Borg Warner Compressor Wheel
FASS Fuel Pump
FASS Suction Tube
GDS FUEL PRESSURE SPRING
AIH Delete W/Boost Fitting
Sonnax Shift Kit
DIY Big Air Filter
4" Magnaflow Turbo Back SS Exhaust
AutoMeter Ultra-Lite Gauges
6" Suspension Lift
35" Tires

45 Auto
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post #8 of 12 Old 07-19-2009, 07:44 PM
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Check to make sure the EBP Sensor is plugged in.
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post #9 of 12 Old 07-19-2009, 07:47 PM
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Cracked up pipe.
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post #10 of 12 Old 07-23-2009, 04:30 PM
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Mine just started doing the same thing. Sounds like the noise is coming from the passenger side under the hood. I just changed the oil, fuel and air filters.

rd
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