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Author Topic: high frequent noise  (Read 826 times)

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Shagma

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high frequent noise
« on: 11 June 2009, 19:37:16 »
Did anyone ever experince to have a high frequent noise in engine compartment?
I have just changed DIS pack, and after I started up engine again.. there it was.. It is not related to rpm.
The only clue I have is that the frequency of the noise is changed if I remove one of the many vacum hoses, and I belive that it is from the area around EGR/DIS pack. I checked all the obvious vacum spots but there could a lot of thing i did not think of. I also removed hose to EGR, and since the sound is still there it must me before EGR...
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Entwood

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Re: high frequent noise
« Reply #1 on: 11 June 2009, 19:47:30 »
Possible vacuum leak .. spray lightly around with some carb cleaner while the engine is running .. if the engine note changes thay is where the leak is  ... the cleaner is being sucked in and burned. After fixing the leak wipe down with paper towel.

Result .... fixed vac leak and a nice clean engine  :)
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Shagma

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Re: high frequent noise
« Reply #2 on: 11 June 2009, 19:52:54 »
Yeah, good idea:)
However, is it safe to mess with carb cleaner on rubber hoses also?
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Entwood

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Re: high frequent noise
« Reply #3 on: 11 June 2009, 19:59:00 »
IMHO ... yes .. you are only spraying lightly .. not soaking them overnight it it !!!!

 ;) ;) ;) ;) ;)
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Shagma

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Re: high frequent noise
« Reply #4 on: 12 June 2009, 15:32:52 »
Tried your trick, heard a change in rpm when spraying EGR. Removed EGR, flushed with carb cleaner, cleaned gasket and reassembled. The sound was gone! thanks :)
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Entwood

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Re: high frequent noise
« Reply #5 on: 12 June 2009, 20:25:14 »
Welcome .. glad to help  :)

It's an easy tip for finding vac leaks ... wish I could claim the credit for it .. but was shown to me years back ... :)
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