Have you tried the reset re-learn procedure above yet? This seemed to help a few that have done the conversion on escort cabriolet club forum.

It is a straightforward plug and play swap when all of the sensors work, don't forget that some of the sensors could be 20 years old now!

Like I said above the car is more than likely in Limited Operation Strategy (limp home) mode and that's why it won't respond to the CO pot. It has reverted to the ECU (well EDIS really) Base settings. Try the procedure, nothing ventured nothing gained!

Lee