Rasping sound from manifold during blipping
#1
Rasping sound from manifold during blipping
Beautiful New Year weather here, so I took the opportunity to clean the engine bay in preparation for maintenance work (heater matrix, cleaning MAF, plugs, etc).
I came back on an old problem, which is a short (max. ~1 sec) rasping noise if I blip the engine.
No hissing or other noise if idling.
I first thought vacuum line, but can't find anything loose.
Then thought the VVT, but disconnecting them does not change anything.
Finally, checked the plugs and fuel injectors, but nothing there.
If I try to pin down the location, it rally looks like it come right from the middle of the intake manifold.
Not sure what is under that.
All I know I noticed this sound 2 years ago for a while.
Since then, the manifold has been off to change cooling hoses, and I presume new seals / gaskets have been used on installation.
Really wonder if anyone can point me to anything to trace furhter.
Thanks, and Happy New Year,
Eric
I came back on an old problem, which is a short (max. ~1 sec) rasping noise if I blip the engine.
No hissing or other noise if idling.
I first thought vacuum line, but can't find anything loose.
Then thought the VVT, but disconnecting them does not change anything.
Finally, checked the plugs and fuel injectors, but nothing there.
If I try to pin down the location, it rally looks like it come right from the middle of the intake manifold.
Not sure what is under that.
All I know I noticed this sound 2 years ago for a while.
Since then, the manifold has been off to change cooling hoses, and I presume new seals / gaskets have been used on installation.
Really wonder if anyone can point me to anything to trace furhter.
Thanks, and Happy New Year,
Eric
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ericjansen (01-07-2016)
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ericjansen (01-07-2016)
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Goncalo Proenca
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