Electric Suppressor Part # wanted
#1
Racer
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I have a '90 C4 and I'm getting radio buzz / noise. It only seems to come on my iPod iDrive until, the buzz increases with engine revs. i have all my grounds checked and everything is tight. I have good RCA leads from the amps, nothing close to any other cables.
I have read the lists and Adrian's book and understand there is a suppressor that was not fitted to '89 and '90 964's.
Does any one have the part number please.
Cheers
Mark
I have read the lists and Adrian's book and understand there is a suppressor that was not fitted to '89 and '90 964's.
Does any one have the part number please.
Cheers
Mark
#2
Nordschleife Master
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Hiya Southampton76
Last person with a buzzy radio had a bad alternator . I think it had a bad diod that was puting out some ac . Does your buzz go away if you pull the alternator belt ?
I don' know anything about a suppressor , sorry . I will try to look around for info on this missing 89/90 part cause I got an 89 .
Last person with a buzzy radio had a bad alternator . I think it had a bad diod that was puting out some ac . Does your buzz go away if you pull the alternator belt ?
I don' know anything about a suppressor , sorry . I will try to look around for info on this missing 89/90 part cause I got an 89 .
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kos11-12 (02-08-2023)
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#8
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I fitted one to my '90 C2 in order to try and get rid of the whistling from my radio. It took less than an hour to fit, and was quite straightforward using instructions I found somewhere on this board. The biggest issue was that the cables are a very tight fit.
The downside was that it didn't fix my whistling! I'm going to replace my alternator next.
there were 2 parts needed:-
Interference suppression filter: Part Number 964 645 011 00
Wiring harness: Part Number 964 645 901 00
do a search here for TSB 99101 to find the instructions.
regards
Tim
The downside was that it didn't fix my whistling! I'm going to replace my alternator next.
there were 2 parts needed:-
Interference suppression filter: Part Number 964 645 011 00
Wiring harness: Part Number 964 645 901 00
do a search here for TSB 99101 to find the instructions.
regards
Tim
#9
Burning Brakes
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I have a suppressor that plugs into the output from my amp and then the RCA leads connect direct to the supprressor. I bought the part years ago when I had my Audi and have never had a problem with "whistling" since.
I think it cost me £8 from my local car audio store so might be worth trying something similar before paying out for a Porsche part.
I think it cost me £8 from my local car audio store so might be worth trying something similar before paying out for a Porsche part.
#10
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One needs to determine whether the noise is radiated or conducted then determine
a solution. The alt. can be removed as a potential source by just removing the alt
light temporarily.
One can quickly add a test capacitor (1000uf/16V) across the battery or at the power
input to the audio device. If this solves the problem, a more permanent fix can be
determined, e.g. the Porsche noise suppressor. As an example, to solve a radiated
noise problem, a ground strap can be added to the engine hood. Ignition wires need
to be checked for bad connections or connectors, as that can be a source for
radiated RFI noise.
a solution. The alt. can be removed as a potential source by just removing the alt
light temporarily.
One can quickly add a test capacitor (1000uf/16V) across the battery or at the power
input to the audio device. If this solves the problem, a more permanent fix can be
determined, e.g. the Porsche noise suppressor. As an example, to solve a radiated
noise problem, a ground strap can be added to the engine hood. Ignition wires need
to be checked for bad connections or connectors, as that can be a source for
radiated RFI noise.
#13
Rennlist Member
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Resurrecting this 17-year old thread I found in my research on alternator whine.
I'm looking into getting the parts for this noise suppressor and having trouble identifying what's what. I'm also referring to the appropriate TSB posted here, which specifies 2 parts to be installed: 964-645-011-00 (the suppressor) and 964-645-901-00 (a wiring harness).
Two issues I'm having finding the proper parts:
Thanks in advance,
- Mike
EDIT: It seems the radio **** is 996-645-901-00. Oops. The 964 prefix yields something called an "installation set" for about $12. No pictures, though, so I'm a bit hesitant. Electrical parts are non-returnable.
- M
I'm looking into getting the parts for this noise suppressor and having trouble identifying what's what. I'm also referring to the appropriate TSB posted here, which specifies 2 parts to be installed: 964-645-011-00 (the suppressor) and 964-645-901-00 (a wiring harness).
Two issues I'm having finding the proper parts:
- Part 964-645-011-00 (a $250 part) seems to have been replaced by 964-645-501-00 (a $45 part). This seems a bit suspicious.
- I can't seem to find part 964-645-901-00. This is supposed to be the wiring harness that goes along with the suppressor, above. Searching for that part number yields a $12 radio **** - not a wiring harness.
Thanks in advance,
- Mike
EDIT: It seems the radio **** is 996-645-901-00. Oops. The 964 prefix yields something called an "installation set" for about $12. No pictures, though, so I'm a bit hesitant. Electrical parts are non-returnable.
- M
Last edited by mgordon18; 02-08-2023 at 12:35 PM.
#14
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Search Rosepassion for the wiring part number. They have an image of it. I bought one from them late last year.
They also have images of the capacitors.
They also have images of the capacitors.
Last edited by 964NZ; 02-10-2023 at 11:25 PM.