Jumpy Tach After AEM EMS Install?

[SixSpeedSleuth]

Just as the title states, has anybody had experience with a Jumpy Tach after AEM EMS Install. Tacked worked great before and I'm 99 percent everything is hooked up correctly. Any suggestions? Tach is very erratic and not smooth like it was before. Very hard to get an accurate reading.

[kpc_0721]

Had the same problem with my tach and speedo being pretty jumpy after dropping my last motor back in.

Just got my car running yesterday and it dosen't seem to be doing it anymore though.

Cleaned all of the grounds and harness plugs so that may have fixed the problem.

Not positive but maybe try that and see if it helps?