FIXED my noisy MAP, TPS, AIT, CLT, and AFR signals for $2.50....
9 Attachment(s)
Yeah!! :beer::friday::D:yippee::bigtu:
I installed a $2.50 ebay noise filter to the power supply feeding the MS. I actually bought 3 for 19.50 shipped so I'd have some extras to play with. Anyways, finally installed one after the relay that powers MS. All I can say is every MS on earth should have one of these on the power supply. The pictures below are from my most recent datalog before adding the filter. Same exact MSQ on both datalogs for comparison. Nothing was changed but adding the noise filter. BEFORE: Attachment 208046 Attachment 208047 Attachment 208048 Attachment 208049 AFTER: Attachment 208050 Attachment 208051 Attachment 208052 Attachment 208053 Attachment 208054 It's not perfect, but it's a lot better. Before I couldn't ever tune my acceleration enrichments right because the spec of noise I had on my TPS and MAP sensors. If I tuned them right and it picked up any noise it would trigger them, causing the car to flood. So now I should be able to dial in my acceleration enrichments without worrying about noise. Everything in general is just smoother though. I'll also add that I bet there's still room for improvement. My grounding scheme is pretty poor. All ground wires hook to a 24 point grounding bar, much like the one used in a 200A square D box. :bowrofl: I believe I'm gonna move the LC-1's grounds off of everything else's, as well as the ignition systems grounds. (have a feeling the ignition system's ground is the major source of noise in the first place) I may also add a filter to the LC-1 after redoing my grounds to see if I can further improve that signal. Also it was it was 49*F today on the "After" datalog pics. Lowest temp it recorded was 48.7*F, highest 51.4. :bigtu: |
Link of said filter please. This looks nice.
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$2.90 plus 5.90 shipping = 8.80 shipped FTW.
Noise Filter 10 AMP Car Audio 12V Stereo RCA Isolator - eBay (item 270265692541 end time Mar-12-09 19:41:27 PDT) |
Thanks man, I'm going to give this a shot as well and clean up my grounds, add a ground to my COPs and hopefully be done with it.
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My car has also had an untraceable "hickup" before. Like it would randomly "go off" for 0.1 seconds and then come back on. I would only notice it a very light load or idle, but it usually happened once ever 10-20 minutes of driving. So far it hasn't done it, but time will tell if the noise filter fixed this as well.
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Is this not something the shack would carry?
I'm pretty convinced my stereo is causing a lot of noise to my MS because I can see every time my sub hits hard in my logs. I can almost play a radiohead album while watching a datalog and see them match lol. |
Originally Posted by wayne_curr
(Post 371201)
Is this not something the shack would carry?
I'm pretty convinced my stereo is causing a lot of noise to my MS because I can see every time my sub hits hard in my logs. I can almost play a radiohead album while watching a datalog and see them match lol. |
i was considering one of those exact filters the other day.... you just convinced me. thanks :)
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Originally Posted by johndoe
(Post 371184)
Thanks man, I'm going to give this a shot as well and clean up my grounds, add a ground to my COPs and hopefully be done with it.
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Originally Posted by Savington
(Post 371215)
Did I forget to add an auxiliary ground? :bang:
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Good job Pat! :bigtu:
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it's probably just a huge coil.
it's essentially a crossover component--low pass, but for very low frequencies. ie almost zero hertz (DC). or it could be an RC circuit with a big cap and a small resistor. |
you can buy the same thing Pat posted at radio shack.
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Perhaps you can buy whatever it's made of, but the exact assembly I have is not available at our local radio shack, or walmart.
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Originally Posted by patsmx5
(Post 371533)
Perhaps you can buy whatever it's made of, but the exact assembly I have is not available at our local radio shack, or walmart.
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Originally Posted by Braineack
(Post 371538)
I cant find it online...I know i had something just like that for my car radio, then I went with a ground loop isolator, probably back in 2000.
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i dont read, you should know that by now!
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Si.
Going to go |
Originally Posted by patsmx5
(Post 371608)
Si.
Going to go But now, the rest of the story. One of the grounds for the LC-1 was wasn't grounded. I'm pretty sure it has been that way, unless I pulled it loose right before I noticed, but I don't think that's the case. Weird, but it's noisier now. Gonna try adding a filter to the LC-1's power and see if that helps. Or try moving the LC-1's grounds around. |
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