Joined
·
14,305 Posts
More interesting was what happened when I turned the water injection off- last itme the power went up, basically because water doesn't burn
. This time however, the power dropped slightly and we could just hear the onset of pinking (knocking).
The overall lambda was OK but I still felt it had to be a fuelling problem as the DI cartridge was only a couple of weks old.
Anyway, today I pulled the plugs out and this is what I found... 1 & 4 black, indicating too rich, 2 & 3 (2 especially) brown/white indicating too lean. So, clearly the lambda had been correcting overall running 1 & 4 rich and 2 & 3 lean.
I've swapped injectors 1-2 and 3-4 and will have another look at the plugs in a day or so.
The injectors all have the same resistance, and are relatively new, so I'm a bit confused to say the least as to what might be causing the problem.
Any ideas?
[edit] for those that don't know, car is a 93 Trionic B234

The overall lambda was OK but I still felt it had to be a fuelling problem as the DI cartridge was only a couple of weks old.
Anyway, today I pulled the plugs out and this is what I found... 1 & 4 black, indicating too rich, 2 & 3 (2 especially) brown/white indicating too lean. So, clearly the lambda had been correcting overall running 1 & 4 rich and 2 & 3 lean.
I've swapped injectors 1-2 and 3-4 and will have another look at the plugs in a day or so.
The injectors all have the same resistance, and are relatively new, so I'm a bit confused to say the least as to what might be causing the problem.
Any ideas?
[edit] for those that don't know, car is a 93 Trionic B234