[blacklotus99]

Thanks for the input. I will start checking again to see if it looks like its getting full throttle. I was assuming it would sound different if running on 5 but maybe not?

This car has a cat bypass installed too. I will have a look at the cap and wires and see if anything looks out of place but it sounds like the diagnosis will be beyond my abilities. Will have to go back to the shop to be sorted I suspect.

At least it sounds like there is probably something wrong and its not just unrealistic expectations.