| VW B5 Passat TDIs This is a general discussion about B5 Passat(>98 (2004-2005 in North America)). Non TDI related postings will be moved or removed. |
August 26th, 2011, 13:25
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#1
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Member
Join Date: Dec 2000
Location: North Central Illinois
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Engine noise on AM radio
I have the stock Monsoon radio. When I got the car back in Nov. 2010 I tried the AM radio and remember it pulling in a weak station that I listen to very well. After having the BSM done and a transmition replaced I noteced that there is a noticeable hash sound only on AM. It only happens when the engine is actually running. If the ignition is on and the engine not running it sounds fine.
Any ideas of how to track it down? Would doing the BSM and Tranny change have anything to do with it? Perhaps some ground isn't solid or some wires got put into a diffetent postition?
Any suggestion would be appreciated
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August 26th, 2011, 14:19
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#2
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Veteran Member
Join Date: Mar 2004
Location: ABQ, NM, USA
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Old spark plug wires? 
Free bump.
__________________
05 Passat GLS 2.0 PD, UnChained & Steel GPs by VW, 15" steelies, New TB/WP, motor mounts, alt pulley, trans filter, cv boots, TSB #P9/66C8, clear bra, premature cam wear?  now driven only once or twice a week
2012 Kia Optima SX turbo, 274 hp, 269 ft-lb @ 1750-4500 rpm, corsa blue, new daily driver 
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August 26th, 2011, 15:15
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#3
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Veteran Member
Join Date: Jul 2010
Location: west chester pa
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its alternator hash. you can put a couple capacitors on the b+ and it will eliminate the hash. most european cars already have them
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"You can't argue with a fool..."
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August 26th, 2011, 19:45
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#4
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Member
Join Date: Dec 2000
Location: North Central Illinois
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I am not sure if it the alternator because the noise doesn't change with engine speed.
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August 27th, 2011, 07:55
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#5
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Member
Join Date: Dec 2000
Location: North Central Illinois
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I disconnected the alternator and still have the noise. What other sources of noise would there be? Fuel pump? ECU?
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August 27th, 2011, 11:34
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#6
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Veteran Member
Join Date: Jul 2010
Location: west chester pa
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you could see if its the fuel pump by pulling fuse. it may be a ground of a shielded circuit. did you try blower fan at different speeds? any motor with brushes is suspect.
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"You can't argue with a fool..."
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