Carbon Build up After faulty lambda

[ashje]

Ok so i was having a few problems getting my engine to run correctly, it turned out one of my lambda's was faulty.

But now there's another problem, due to faulty lambda and only doing short runs at a time there is a lot of carbon build up inside my engine, starts fine from cold and then starts to misfire as it warms up and keeps getting worse the hotter it gets.

What is the best way to get rid of this build up without stripping the engine? I've read a lot of conflicting information on the net, seafoam, spraying water down the inlet etc.

Thanks
Ash

[Supafly]

Have you changed the spark plugs?

[ashje]

Yeah plugs have been done recently, i've also cleaned them since

[ross_jsy]

Given it a god ragging?

Don't be spraying water down your inlet what ever you do

[reggid]

subaru upper engine cleaner, spray into the vacuum port. seafoam works but probably only available in USA

[ashje]

I will definitely have a look into that, thanks.

I didn't think spraying water down the inlet was a good choice either to be honest.