c-mac Posted January 17, 2019 Share Posted January 17, 2019 I have a 2012 chu613 MP8 that as the duty cycle gets to 10% or so, the A'treatment fuel pressure drops from 8 to 15 psi under engine fuel pressure which is running in the upper 60's. The exhaust temps never get higher than 750deg or so and wont complete the regeneration. This particular unit has a 7th injector with the "T" fitting on top where the air and fuel lines connect. Just wondering if any of you have seen this and what you've done to correct it. I thinking it could be either the 7th injector, the shut off valve or the T fitting on top of the 7th injector. I've been working on a large fleet of these trucks from 08 t0 13 models for 8 years and haven't ran into this before. Quote Link to comment Share on other sites More sharing options...
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