My tach reading drops to 0 under 1000 RPM. I have an EFII dual ignition system with the AFS dual RPM board. Ironically, my older ignition system was a dual LSE system with the same AFS board and the RPM was erratic above 2300. Any ideas?
My tach reading drops to 0 under 1000 RPM. I have an EFII dual ignition system with the AFS dual RPM board. Ironically, my older ignition system was a dual LSE system with the same AFS board and the RPM was erratic above 2300. Any ideas?
Did you have to change the pulses/2 rev with the new ignition?
Rob Hickman
Advanced Flight Systems Inc.
Couple of things you can verify:
Ensure pin 31 WHT/ORN has +5v over pin 16 BLK.
Verify mag ground to firewall ground to ensure low Ω reading.
The 71420 should be wired into pin 32 of the engine sensor main cable.
You could also try a single mag connected straight to the EFIS.
Manual 3.02 Page 197