Coyote Gen 4 start-up issue

[edwardb]

Ed, I tried unsuccessfully the 0,5PPR mode and neither all the others. The tach yellow wire is connected to the Coil-Tach purple wire from the dash gauge harness. Instructions talks about a resistor to connect to the yellow wire and +12volt power. Would you have any thoughts on this matter?

Based on what you've described already, just want to confirm you have Speedhut (Vintage) gauges, right? If not, my answer does not apply. The 0.5 PPR setting is the only one that will provide an accurate tach reading for the Coyote assuming everything is wired correctly. Set the tach there and forget it. That's the right one. I assume you're following the Factory Five Coyote installation instructions?

https://www.factoryfive.com/wp-conte...ter-rev-1K.pdf.

With Speedhut gauges and the Coyote it's necessary to break into the wiring on one of the coil packs for the tach signal as shown starting on page 107. Have you done this? With that wire connected back to the tach wire on the gauge the tach will function correctly when powered.

Not sure where you're seeing the reference to a resistor to connect to the yellow wire and +12volt power. Maybe in the Ford instructions? But that doesn't apply to Speedhut gauges.

Paul B. (EdwardB on the forum)