My first car, a Mk1 Escort 1300, had its motor reconditioned soon after I bought it. My dad, the wealth of all automotive knowledge, put the motor back together when we brought it back from the machinists. As most here would know, the old Kent motor had a strange
firing order:1243. Dad in his wisdom put the ignition leads on a conventional 1342 like most 4 cylinders. When it was time to start the motor up, it kept missing and farting and Dad kept stratching his head why it was doing this. He called over his mate, Guru. I watched my dad and his mate Guru try everything to get the esky going again. Guru then said, "Ahh it just needs some aerostart to get it going." While the old man cranked the motor over, his mate Guru sprayed some WD into the throat of the carby. An almighty blue flame exploded from the carby and a fireball engulfed Guru's head. His hair caught on fire, his eyelashes and eyebrows were all singed but suffered only a burnt ego.
Guru came back a few days later with a gregorys with the correct
firing order.