Miss firing

[Osborne0121]

Went to take the Evo 4 with 6 engine today for a mot today started fine
Went up road started to missfire like a bitch
Got it back changed plugs changed coil packs still miss firing like a
Bitch any ideas ?

 

[Simon@NTS]

Coil packs are a possibility, isolate the missfire then swap the coil packs over see if the miss fire moves

 

[Osborne0121]

Now sorted ... Bottom intercooler pipe split