 tach wiring |
 Oct 20, 2012 - 11:10 PM
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 Enthusiast  Joined May 13, '06 From Kaimuki, HI Currently Offline Reputation: 10 (100%)  |
So I need to know which wire on the back of the gauges is for the tach signal. In digging around in google I have found that it should be either black, green, gray, or white with a blue stripe. None of those wires exist on the gauge wires except for the green which leads to a bulb. I know the black wire is on the tach, but I've already rewired my whole engine to get the Autronic SM4 computer set up, so no more stock igniter. Anyone have any ideas?
-------------------- -Jay
95 GT conv. project car: Manual, Gen III 3sgte, JN pisons, Eagle rods, overbore, crank knife-edged, crank scraper, ARP head/main/flywheel, Autronic EMS, Haltech Dual Wideband O2 controller, Audi 1.8T individual coils, FMIC and SSQV BOV, 3" downpipe, 3" ultra-high-flow cat, 2.5" Borla muffler, +other 01 S2000: FMIC, Haltech EMS, Haltech wideband, 570cc inj, forged pistons/rods, sleeved block, 5 angle valve job, ported and polished 02 R6, all stock, except for braided stainless brake lines, frame sliders, and adjustable brake/clutch leve |
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Oct 26, 2012 - 1:45 AM
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 Enthusiast Joined Jan 4, '12 From US Currently Offline Reputation: 6 (100%) |
The tach signal is a clean signal, with little to no noise and there is a dedicated wire for that purpose. It could be possible to pull a similar signal from another wire, but it might not be as clean a signal as the one going through the wire you've already chosen.
You know you're doing it right when it's not easy, is all I always say. I had to take the tach signal for my Megasquirt from the distributor plug, because my igniter was bad. It's a tad noisy but it works. ECU came with a shielded wire which helps a lot too. This post has been edited by Syaoran: Oct 26, 2012 - 9:24 AM -------------------- 1993 Celica GT Coupe - sold
1994 Celica GT Liftback |
Posts in this topic
match220 tach wiring Oct 20, 2012 - 11:10 PM
Syaoran Is the car originally a 5S? Oct 23, 2012 - 1:16 AM
match220 QUOTE (Syaoran @ Oct 22, 2012 - 8:16... Oct 23, 2012 - 1:19 AM match220 Directly behind the tach gauge are three screws th... Oct 23, 2012 - 2:41 AM Syaoran I believe its the gray wire at the tach. Here... Oct 23, 2012 - 2:57 AM match220 QUOTE (Syaoran @ Oct 22, 2012 - 9:57... Oct 23, 2012 - 3:03 AM Syaoran There should be only one going to the tach. If you... Oct 23, 2012 - 3:05 AM match220 QUOTE (Syaoran @ Oct 22, 2012 - 10:0... Oct 23, 2012 - 3:21 AM match220 QUOTE (Syaoran @ Oct 22, 2012 - 10:0... Oct 23, 2012 - 3:28 AM Syaoran Glad I could be of help. Would be nice if you coul... Oct 23, 2012 - 8:50 AM travisxcore Can't you pull a tach signal off the the 12v p... Oct 23, 2012 - 10:06 AM match220 QUOTE (travisxcore @ Oct 23, 2012 - 5... Oct 23, 2012 - 2:34 PM |
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