Quote:
Originally Posted by vstol
I have a LS-3/427 with an Autometer tach and the Autometer LS adapter for the tac (9117/9123) and the tach shows the idle to be 1900 when in fact it is 980. What did I miss? I thought I had set the tach right I believe it was 4 cylinders and it is a huge effort to get it back out so I would like to avoid that. thanks
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I'm laughing at this because if it's set to 4 cylinders and getting a signal from 8 then sure -- it would read double.... But the LS standard output is a 4 pulse - but the tach adaptor kicks it to 8.... So my guess is --- you needed to set the tach up for 8 cylinders - and allow the adaptor to do it's job.
You might need to read this "fix" twice to understand it -- I did. Basically it's an issue of you used the adaptor - thus outputting a 8 cylinder signal and the tach is set up (per what you said) to read 4 cylinders....
https://www.autometer.com/resources/...faq_view/id/77