1994 Range Rover 4.2 Firing Order?

Hey all, new user here.
Just tried googling but couldn't find anything on a answer but did find this usefull site
Anyhow, im here with a question from my dad's mate:

He has tge Range rover engine for a stockcar and had it started it up last night but its only running on 5 cylinders instead of the 8

He's wanting to know the firing order for a 1994 Range Rover 4.2 Injection? incase this is the problem..


Thanks for reading,

Mark

Ok, I've now found the firing order and its the same that he has in.
What else could be the problem?

Still only going on 5 cylinders

bad plug lead, bad plug, bad dizzy, bad head gasket....
until you start checkin it really could be anything