I have a 96 XJS 4.0 with high idle issues that I have narrowed down to a faulty signal to the idle control valve. I have have no vacuum leaks, properly cleaned the throttle body and replaced the temp sensor. I have tried three different idle control valves and continue to get the same high idle issues after going through the start up sequence for 'calibrating" the ICV.
There is a 95 XJ6 sitting in my local Pick and Pull and I was wondering if the ECU from it would be interchangeable with the 4.0 in my 96 XJS.
95 XJ6 part number - LNA1410AH
96XJS part number - LHE1410AL
Thanks - Kevin