Quote:
Originally Posted by 930 porsche
On my 1978 930, my tach quit a few months ago and my mechanic try troubleshooting and could not find the problem. He then hooked up a white wire with the BLK/Purple wire and worked fine since but I do not know what the white wire is for and also i rather find the problem and get the BLK/Purple working properly without depending on connecting other wire to it. What are the steps for me to do in order of getting this tach working again. I need education of where it is getting its power and how does it respond. A wiring diagram from the acual back of the tach connections to the ICU will be really helpful.
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So, if your tach started to work when your wrench connected the white wire at the CDI to the BLK/Purple wire (thereby feeding the tach with a signal from the white wire rather than a signal from the CDI) then this would mean to me that your CDI is on its way out. Of course check all connections first and check the alternator & regulator are working properly.
It could be time to upgrade your CDI by replacing it with an MSD6AL or the newer more efficient one.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.
1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.
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