Hi went to Sheringham for a day trip in the Vitesse . Outward trip was fine , return was fine until 40 miles in, then suddenly jerking kicking out of overdrive. Pulled over and couldn’t find anything obvious . Carrying on kangaroo actions in second , cured by foot to the floor , Happened in 3rd but not so vicious and in 4th but less again like a seesaw effect . To get home left overdrive alone and kept the revs high 3k plus and got home safely . I tested overdrive on the last mile and all ok. Total miles today 140 miles . We recently went to Ireland 1400 miles with no engine issues .
My diagnosis is that it’s fuel related , all pipes are new, R9 where required , inline filters , hopefully will find a gremlin in the needle valve .
The Irish trip was traditional points , last 300 miles converted to Accuspark electronic . Dizzy is Lucas , fuel pump has new diaphragm though will check
Am I on the right track or missing something
Paul