About 4 weeks ago I wrote in and asked about the engine hesitating repeatedly when I was trying to keep at an even speed when it was hot. A crack in the IACV that opened up when hot was suggested but I have just fitted a new one and made several trips with the same result that the engine cuts out at any even speed. The old one made an intermittent high pitched buzzing sound, the new one doesn`t. Starting is OK and tickover was and is uneven at between 750 and 880 rpm, fast when cold but slows when getting warm. When I put my foot down it picks up immediately but with a sudden pick up and then accelerates without hesitating. When decelerating there is no hesitating or lurching either. There is about 11mm slack in the accelerator cable. Before this happened I had replaced all the hoses as they were as old as the car and one had burst. The thermostat and hoses were replaced as a set. A new temp. sensor was fitted (like for like) as the gauge showed normal even when the engine was boiling and no warning lamps were lit. The downhill light sometimes comes on for some reason. Even tho`I am an old analogue driver I wanted to find out a bit more about these probs so I bought a Bluetooth diagnostic reader. It told me that there was a problem with the CPS that I have just cleaned and that there was intermittant misfiring of the ignition system. Also a result that read TID:$04 CID: $02 test incomplete or dependant test failed. Both coils and leads and plugs were replaced by the previous owner in Aug 2018 (car used little since) and I have just cleaned and adjusted the plugs and cleaned all relevant wiring connections. I am way out of my depth when it comes to car electronics having had the same car for more than 40 years, none in that, not even a digital clock. Any help or advice would be appreciated.