Sadly, the more incompetent the diagnostician, the more you pay for trial and error tinkering. I don't suppose any of the above call-outs, diagnostic tests and work done was overpriced, even if it was unnecessary. But it was pointless doing an MoT and 'full service' including stuff like brake fluid change as well as oil and filter before the car was repaired and running properly, because if the correct diagnosis was CHG failure you might decide to scrap it.
Lots of questions....how old? Mileage? How often did you check coolant and oil level? Were they OK before the long journey? Have you been having to top up coolant frequently? Was the misfire obvious, or did the tester just say it was misfiring when it wasn't? As for 'it'll be OK as air blowing through it'.......???! Did he think it was an old VW Beetle?
Edited by John F on 23/11/2018 at 17:39
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