Please excuse the spelling ( damm phone )

Right my other half has a 1.4 206 with the KFW engine code,there is an intermittent fault where the engine will run on 3 cylinders and show the engine light.

I scanned the car and it says " Random cylinder missfire " so far I have changed the coilpack,sparkplugs,injector loom,coilpack loom,Injectors have been tested and are fine.

Whats left ...ecu?

It's a Peugeot; I'd suspect a bad connector someplace. The mechanics at my local garages concur in the general case.

Might be worth checking main earth lead from engine to battery,

I noticed that other halfs dads peugeot boxer camper van was running like a sack of crap a few months back but he didn't complain so i never said owt then one day it just wouldn't start, turned out earth lead to gearbox had almost corroded away but he had no other problems until then,

I replaced lead and it now starts and the engine seems to run alot smoother,

Is there a pattern to when it does it, ie hot/cold, driving at a certain speed etc

It started after we had a lot of rain water in the pasengers footwell I dryer it out and its never been wet since so I will check earth leads :-)