C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

hei hell help

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Old Jan 11, 2007 | 10:16 PM
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smfspeedemon
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Default hei hell help

okay im at my ropes end and ready to take my car to a shop (bite my tounge) okay hopefully someone can save me from comiting that sin! on my 88 (nothing is stock except dist) the tach wire when traced back to the computer is one of three wires that plug into the back of the dist. were does the tach wire that goes into the top of the cap next to the bat. terminal come from if its the tach filter then were does the tach filter come from i need that wire or my msd will not work! thank you to anyone who can help!
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Old Jan 11, 2007 | 11:23 PM
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The tach filter was held in place by one of the bellhousing to engine bolts on the driver side. It looks like this. I believe the metal bracket is the ground for the filter.

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Old Jan 12, 2007 | 01:16 AM
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but where does the wire connect to (at both ends) also if im running a aftermarket tach do i need a tach filter?"
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Old Jan 12, 2007 | 01:18 AM
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on the msd 6al, you bypass the tac filter... don't have my fsm handy so can' t comment on the other end...
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Old Jan 12, 2007 | 03:22 AM
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The line from the tach filter goes through a multi-pin connector behind the I/P into pin C5 of the 32-pin connector on the digi-display.
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Old Jan 12, 2007 | 05:56 PM
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Default Tach

I f you are using an aftermarket tach , there's a terminal on the MSD box for a direct hook-up. Some aftermarket tachs require an adapter available from MSD.
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Old Jan 12, 2007 | 07:26 PM
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Originally Posted by smfspeedemon
okay im at my ropes end and ready to take my car to a shop (bite my tounge) okay hopefully someone can save me from comiting that sin! on my 88 (nothing is stock except dist) the tach wire when traced back to the computer is one of three wires that plug into the back of the dist. were does the tach wire that goes into the top of the cap next to the bat. terminal come from if its the tach filter then were does the tach filter come from i need that wire or my msd will not work! thank you to anyone who can help!
Buy a period man! Trying to understand that sentence made my head hurt!
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Old Jan 12, 2007 | 08:28 PM
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ditch that p.o.s. msd 6a, 6al or whatever it is. I used a msd 6a and it left me stranded once. I am totally against aftermarket hei multispark boxes.
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