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FiTech tach wire shielding
#2354596
08/16/17 01:15 AM
08/16/17 01:15 AM
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Joined: Feb 2003
Posts: 1,306 Laveen, Arizona
GTSDart340
OP
pro stock
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OP
pro stock
Joined: Feb 2003
Posts: 1,306
Laveen, Arizona
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I know this has been posted on here before, but I can't find the thread after many board and Google searches. What's the best way to shield the wire? I'm getting the "RPM noise" code, and since that's a very common problem, I figured I'd start there. Sorry for the repost. Thanks!
1949 International KB-2 "Mater" - 302/T5
1968 Dodge Dart GTS "The Drat" - 340/727
2006 Dodge Magnum R/T - Hemi
2016 Dodge Durango Limited - 3.6
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Re: FiTech tach wire shielding
[Re: GTSDart340]
#2354613
08/16/17 01:41 AM
08/16/17 01:41 AM
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Joined: May 2003
Posts: 6,562 Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,562
Downtown Roebuck Ont
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What I did with my old Holley TBI was use 2 conductor shielded cable spliced as close to the pick-up as I could and made sure the foil shield was long enough to cover the splice flush to the pick-up. I could not get a usable tach signal until I did this. Most of the noise is inside the distributor from the spark jumping from the rotor to the towers. MSD sells a 6'cable with their ends on it. If your distributor doesn't have shielded pick-up wires you could just cut off the plug and splice it in like I said. The stuff can be hard to find unless you want 500 ft of it. https://www.msdperformance.com/products/accessories/harnesses/parts/8862Kevin
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Re: FiTech tach wire shielding
[Re: GTSDart340]
#2356072
08/18/17 03:03 PM
08/18/17 03:03 PM
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Joined: Feb 2003
Posts: 1,306 Laveen, Arizona
GTSDart340
OP
pro stock
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OP
pro stock
Joined: Feb 2003
Posts: 1,306
Laveen, Arizona
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All right, I'll give it a shot! Thanks!!
1949 International KB-2 "Mater" - 302/T5
1968 Dodge Dart GTS "The Drat" - 340/727
2006 Dodge Magnum R/T - Hemi
2016 Dodge Durango Limited - 3.6
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Re: FiTech tach wire shielding
[Re: GTSDart340]
#2356336
08/19/17 12:46 AM
08/19/17 12:46 AM
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Joined: Feb 2003
Posts: 1,306 Laveen, Arizona
GTSDart340
OP
pro stock
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OP
pro stock
Joined: Feb 2003
Posts: 1,306
Laveen, Arizona
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It's a common thing. The injectors need a clear signal to fire properly, and if there's any interference, they won't and they'll give an "RPM noise" fault code. I'm not sure if it's more common with timing control or not though.
1949 International KB-2 "Mater" - 302/T5
1968 Dodge Dart GTS "The Drat" - 340/727
2006 Dodge Magnum R/T - Hemi
2016 Dodge Durango Limited - 3.6
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