My Mum's old KF GHIA had an issue where the thermostat stuck open ... and ran cooler ... only noticed the issue once it was Winter though and was harder to start and the heater wasn't working too well.
That was about the only issue (apart from 1 ignition module) in the 14 years of ownership from new.
I should have bought it off her when she eventually let go of it. Had the full Whiteline suspension kit through it ... and drove soooo well even at 14 years old .... used bugger all fuel ... and the 5-speed manual in it was a nice little shifter too.
