The filter is not the problem, sounds like the vacuum reservoir solenoid is stuck open. That allows the vacuum to bleed out when the key is off. errr let it suck air in.
Anyhow it's only a $32 part.
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| Author: | tangov8 [ Sun Apr 17, 2011 3:58 pm ] |
| Post subject: | Buzzing noise on vac side |
Hi, on the LHS of the engine bay is a black box which says VAC on it,it has a filter under it like a normal in line petrol type.My question is,is it ment to buzz,even when the ignition is turned off? ( At least one of the vac pipes goes to the turbo) Many thanks Dave |
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| Author: | uham [ Sun Apr 17, 2011 10:07 pm ] |
| Post subject: | Re: Buzzing noise on vac side |
Dave, Sounds like the boost pressure solenoid filter. It should be replaced every 12,500Mi. It's easy to miss this filter. It's a dealer item but you can get them online. |
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| Author: | BlackLibertyCRD [ Mon Apr 18, 2011 12:12 am ] |
| Post subject: | Re: Buzzing noise on vac side |
The filter is not the problem, sounds like the vacuum reservoir solenoid is stuck open. That allows the vacuum to bleed out when the key is off. errr let it suck air in. Anyhow it's only a $32 part.
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| Author: | tangov8 [ Mon Apr 18, 2011 1:05 am ] |
| Post subject: | Re: Buzzing noise on vac side |
Thankyou, I had already put a new filter on last week but it still makes the same noise,the Jeep goes into a local garage on tuesday to try & solve the cutting out fault,I just wondered if this had something to do with it & I could save some money & down time by finding the fault myself & mending it,could it cut the engine out under hard/high speed driving?  Many thanks Dave |
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| Author: | Billwill [ Mon Apr 18, 2011 3:32 am ] |
| Post subject: | Re: Buzzing noise on vac side |
My RHD 2002 2.5 CRD has that solenoid on the right hand side, right behind the air filter box, near the power steering and brake fluid resevouirs. As far as I know, that is the solenoid that controls the EGR (Exhaust Gas Regenerator) at the rear of the motor. Mine has always buzzed from day one when new, I would be interested to know what your dealer has to say about it after they have attended to your Jeep! 
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| Author: | tangov8 [ Mon Apr 18, 2011 4:36 pm ] |
| Post subject: | Re: Buzzing noise on vac side |
Will let you know,it may not be a problem,I met a fellow owner in a petrol station who said his does the same regards Dave |
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| Author: | camo [ Sun Jul 10, 2011 7:32 pm ] |
| Post subject: | Re: Buzzing noise on vac side |
what is the part # for the boost selenoid filter? anyone? thnx |
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| Author: | geordi [ Sun Jul 10, 2011 10:32 pm ] |
| Post subject: | Re: Buzzing noise on vac side |
camo wrote: what is the part # for the boost selenoid filter? anyone? thnx Purolator little-paper-fuel-filter model # found-in-your-parts-store for about $5. As long as the tube fits the rubber (so get the smaller one) you will be fine. That isn't that special of a part, it is basically just a dust filter. |
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