Warning - if you leave a plug lead off or fit it incorrectly - or if you notice your MW3 go onto 1 cylinder - STOP.
I am not talking about splitfire ( lumpy firing every other cylinder or 4 revolutions instead of 2 ) when you are stuck in a jam!
The result will be that fuel keeps getting squirted into the non-firing cylinder and an internal cat/exhaust pipe fire will occur!
Gets so hot the mounting rubbers catch fire and scorch the paintwork requiring a re-spray and complete new exhaust system on that side. Be warned!
