Just took the 4 branch manifold off my Orion Efi and cylinders 134 are black and sooty but number 2 is clean and grey. Car is running with misfire that I've been unable to diagnose. Would anyone think that there might be an injector problem on number 2?
Thanks
Dave

 

Maybe coil pack........but u can get the injectors tested in

 

Is the ignition ok?

Martin

 

Take spark plugs out look down bores is the top of piston really clean?
Are you using coolant?
You know what i am going to say next.

 

Strangely coolant does drop from full mark on header tank to lower level but then stays there and had head off a few weeks ago to check but all looked fine.
Surprise could try swapping injectors around.
Dave