Ok – Tune or no tune required for the Coyote (regarding a stalling issue reported in several other posts)?
Here is my experience.
I received plates yesterday and took my Mk4 for a road test - up to typical speed with numerous stops. I did not encounter any of the stalling when coming to stop as reported in other posts. The coyote is very responsive, well-mannered and predictable. TKO 600 takes a little practice. Overall the Coyote was smooth and I have no issues to report.
I installed the Coyote as per the FFR instructions however I did not modify the gas pedal length, so the pedal response is as designed and intended by Ford. I purchased the intake as per FFR parts list which maintains the diameter of the OEM intake. I installed the O2 sensor wires as supplied (original lengths with no modification). I installed the additional speed sender unit (transmission to ECU) as per revised requirements. I also fabricated my own J-Pipes from a set of stainless J-pipes from FFR for a 4.6L (O2 sensor locations ~ 4inches from header connection).
My experience supports the FFR installation instructions and I have not encountered the stalling that others experienced. This may be due to the sensitivity of the system i.e. any modification to O2 sensor wires, intake diameter, O2 sensor position etc., may impact the performance.
If I encounter any issues, I will provide an update.