I have a 1983 Mondial QV (one of the 152 right hand drives

) in excellent condition and well serviced engine etc etc etc.
The last few days I noticed a burning smell, its not a burning oil smell, it happens when I accelerate hardish.......... if I only accelerate normally (like 0 - 60 in 15 seconds) I dont smell anything? It weird that it smelled burney when going uphill.... so thought it could be a wire or plastic part leaning onto the engine?
I did pop the front bonnet and did smell a very very light wiff of this smell :/ I looked at all the wires in front and in the engine area but cannot see anything untoward? Today it never smelt at all........hummmmm
Any ideas?
Gary.
ps: I was only 4 in 1970 lol and live in Maidstone, UK lol (cannot sus out the forum details bit...doh!

)