Collected the V8 after it had been parked up for a month due to 1)the misfire, 2) the engine warning light, 3) floppy manual linkage and 4) a toc toc toc noise seemingly from the rear driver side wheel region related to wheel rotation speed.
Started first time. No misfire and the engine warning light had turned itself off.
A friendly gremlin?
. Curious the engine warning light reset itself while just parked
Wish said gremlin had found the time to fix the other issues
Nevertheless, she's going to be my daily driver for the next few days ( until I fix the sudden misfire on the Astra turbo ). I'd almost forgotten what a great driver's car the ZT 260 is. Now spotlessly cleaned and waiting for the first seagull!