Just an update
(1)
I noticed the coolant level was low so I topped it up. (The internal temperature gauge was at normal levels)
(2)
The oil level was OK in the dipstick, although the colour was slightly "black-ier" than normal. My oil is 1 year old.
(3)
I also added 20 litres of fuel (it was slightly low though still 10-20% tank full)
Result of the above
(1)
Runs better but still slightly hint of "hesistation" and 1 backfire "phat" sound at 4rth gear and above 30mph
(2)
As always starts A-OK and idles at 10,000 rpm as normal
(3)
Drives OK without any hiccups or jerks at lower < 30 mph speeds
(4)
Slight hiccups and occasional backfire at > 30 mph
My basic questions
(1)
Is this serious enough to take to the garage. I have a service due in 1 month and I could bring that forward if required. Will make the decision tomorrow, so any suggestions would be welcome
(2)
Is my poor little engine OK?
Your previous suggestions have been great.
Please keep them flowing in.
Thanks