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

MSD Digital 6

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Old Jan 27, 2002 | 07:30 PM
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Default MSD Digital 6

I just installed a Digital 6 in my 93. At around 2700 rpms my tach freaks out and bounces around and my service ASR light comes on and stays on. When I disconnect the ignition and put it back to stock the tach and ASR are normal does anyone have any ideas?? :confused:
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Old Jan 27, 2002 | 07:33 PM
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Default Re: MSD Digital 6 (93Zeus)

There should be some directions for disconnecting or bypassing the car's stock tach filter. That should take care of your problem.
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Old Jan 27, 2002 | 08:54 PM
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Default Re: MSD Digital 6 (Nathan Plemons)

Thanks, I like your color polo is the only way to go. Is the tach filter the small black box on the coil wire? How do I bypass it? The MSD manual said to just bypass it but doesnt say how to
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Old Jan 27, 2002 | 09:30 PM
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Default Re: MSD Digital 6 (93Zeus)

Now that I'm not sure. You might have to cut the wire and then tap it again on the other side of the filter, so it's not actually going through the filter.
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Old Jan 27, 2002 | 10:30 PM
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Default Re: MSD Digital 6 (Nathan Plemons)

Thanks for the help :cheers:
I found some articles about it in the archived search and they said the same thing as you. Cut the two white wires splice them together and dead end the black which is a ground. Everything works fine now tach and ASR. Kindof wondering what that had to do with the ASR though oh well thanks again :D
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Old Jan 27, 2002 | 10:42 PM
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Default Re: MSD Digital 6 (93Zeus)

The ASR (Acceleration Slip Response..?) needs the speed of the tires, it probably takes that from the tach. If its getting some funky value that it's not expecting its going to think its broke.
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Old Jan 27, 2002 | 10:45 PM
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The ASR (Acceleration Slip Response..?) needs the speed of the tires, it probably takes that from the tach.
It isn't taken from the VSS? The speed of the tires is relative to RPM and gear ratio, not only RPM.
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