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BAD HISSING NOISE
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=61020		 Page 1 of 1
Author:  Allengua [ Sat Jun 04, 2011 11:00 am ]
Post subject:  BAD HISSING NOISE
2005 CRD 2.8 when you accelerate going down the road i get a bad hissing as if the its blow back on turbo also when you shut it pf there is a electric noise on drivers side of motor for 20 seconds after keys turned off need help any ideas its got 83000 miles on it thanks
Author:  Joe Romas [ Sat Jun 04, 2011 11:22 am ]
Post subject:  Re: BAD HISSING NOISE
Allengua wrote:
2005 CRD 2.8 when you accelerate going down the road i get a bad hissing as if the its blow back on turbo also when you shut it pf there is a electric noise on drivers side of motor for 20 seconds after keys turned off need help any ideas its got 83000 miles on it thanks


The electric noise is the FCV and that's normal unless it a grinding sound, a whir or slight hum is normal. Check the two large charged air hoses for splits. To do it you must remove them. One on the left and one on the right. Most likely the one on the passenger side.
Author:  Allengua [ Tue Jun 07, 2011 6:26 am ]
Post subject:  Re: BAD HISSING NOISE
Well thers no grinding noise but there is a solid electrical hum do these have a valve or something that resirculates the exhaust back into the motor when cold ? somethings not letting all the pressure of the motor took the motor intake tube off cooler and it seems like its blowing back into the cooler for some reason not all exhaust is not making it out. if there is a vaulve where would it be? thanks for the help!
Author:  Joe Romas [ Tue Jun 07, 2011 7:06 pm ]
Post subject:  Re: BAD HISSING NOISE
Hum at shut off is normal :lol:
There's a butterfly plate in there that shuts off airflow at engine shutdown to prevent a shuddering shutdown. The butterfly plate also closes part way when EGR is called for and the EGR valve opens. This is so the engine will suck in exhaust gas when it's called for. If your getting exhaust out of the FCV where the hose attatches the the EGR valve may be stuck open. They can be cleaned.
The EGR valve is on the drivers side of the engine rearward of the FCV.
You can see the butterfly valve in the Flow Control Valve (FCV) with the charged air hose off. With the engine shut off it should be spring loaded open and you can reach in and close it and it should spring back open :SOMBRERO:
Author:  Allengua [ Tue Jun 07, 2011 11:28 pm ]
Post subject:  Re: BAD HISSING NOISE
Thanks im going to try that this weekend and see if that the prob ill post what i find thanks alot 4 the help!
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