Diesel Injector Analysis

[peter69_56 Lurker Find all posts View Profile Close peter69_56]

Attached are 2 snapshots of my Prado 150 2012 showing injector data, temperature etc. The first is at startup and continues on the second sheet on a quick warm up drive. I am trying to analyse the injector data to establish the condition of the injectors, but I dont know enough about it to fully understand. At the start all the injectors were relatively stable except injector 4 which ran out to about -3 but the engine was cold at 15C. Once the engine warmed up all the injectors seem to be running fine.

I would appreciate others input if you have a diesel background and work with injectors. Whether you think they should be replaced based on the data shown or whether the deviation on injector 4 is normal when cold?

[krypto Avid PP Poster! Find all posts View Profile Close krypto]

Those graphs are a bit hard to read, really need values.

However, individual injector values aren't everything. Total injector volume (<8 is apparently ok), total injector period (500-700 range), calculated load (<16, although I suspect a dirty intake due to EGR effects this), all matter. You should also really provide kms.

I just did mine the other day, 2010 Prado 150, 160k, picture attached cold and fully warmed up. Didn't fluctuate anywhere as much as yours, which may be a concern.

Ultimately injectors are wear items, as are the washers.