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66glide
New Member
6 Posts |
 Posted - 01/25/2019 : 07:16:47 AM
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I am newly back into the Heavy Duty field, and newly employed at a school bus garage as a semi-retirement job. Please forgive my numerous forthcoming questions. The bus is a 2012 IC.
A co-worker recently changed out a DPF so badly plugged that the bus would start and run for a few seconds then die and not restart. This bus showed no codes. This puzzles me, and makes me think the differential pressure sensor is skewed. I wanted to watch DPFE pressure sensor readings after to look for change, but it is not my work order, and I do not want to step on toes.
I'd still like an education from you folks. If this was in your bay, what would you look for to prevent a repeat failure? |
Edited by - 66glide on 01/25/2019 07:18:53 AM
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 01/25/2019 : 07:29:14 AM
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The emission gear on an IH is really just there for looks and for them not to get any more EPA fines , I've tested this and you can remove the doc and dpf and just have sensors hooked up it will run with no codes drove it for over 30 minutes. We have issues with the dpf falling apart look in the tail pipe and big chunks of it sitting there and no codes lol this is why I think its just there for cosmetics on these years DT9s.
I would check the bosch ecm on frame by battery box you will find one power wire that splits to five(i think) the heat shrink will look good but many will be green under it, pull your IMT( melted) and IMP(plugged) sensors and inspect, same with EGR and ITV issues with those components and sometimes o codes until an actually internal failure, have seen no codes with bad injectors and pucks that destroy DPFs I'm to the point after 150,000km I changed all injectors and pucks and it has saved on a lot or reoccurring issues with the emission components |
OEM trained in wiring and all engine platforms for over 20 years
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MAXXFORCE DPF plugged...no codes.
