I just put in a MSD 6al with Taylor wires and now my digital dash (Nordskog) is going crazy. The speedometer is the main problem saying I'm driving 70+ while still in park. My question is, Where can I get emi/rf suppressing wire for my electronic speedometer sending unit? I've been looking all over and still can't find any unless I buy an industrial roll of it for $1000.

 

Where is the sending wire running in relation to the MSD wiring, or spark plug
wires?

You might be able to fix this problem by wrapping a grounded wire around the
signal wires, or moving them to cross at 90 degrees to any of MSD leads (
if they are currently running in parallel bundles).

 

Would it be possible to just use coax cable or RCA cables and strip off the ends, both of these are sheilded wires?

 

As a sheild, probably. Any sort of wrap around the signal wire, which is grounded
should improve the situation.

Using the coax/RCA as a signal wire however, I'm not too sure. It depends
how much current is used, and the gauge of the conductor.