Help! Tach Signal Disappears - Holley HP EFI

[dhutton]

Looks like Holley has programmable detection level and filtering for the crank signal. I can tell you that incorrectly setting one or both of these could very easily cause your problems.

http://documents.holley.com/199r10676rev.pdf

Minimum signal voltage and Filtering in the above document.

Don

[andrewb70]

Are we certain that the reluctor wheel has not moved on the crank? I've read multiple accounts of this happening.

Andrew

[andrewb70]

Originally Posted by dhutton

Looks like Holley has programmable detection level and filtering for the crank signal. I can tell you that incorrectly setting one or both of these could very easily cause your problems.

http://documents.holley.com/199r10676rev.pdf

Minimum signal voltage and Filtering in the above document.

Don

Don,

I had to double check, but those parameters are not accessible when the ignition type is set for LS engines.

Andrew