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RBrian
Senior Member
United States
71 Posts |
 Posted - 10/31/2018 : 04:25:40 AM
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| SCR issues, VGT actuators, NOX sensors and turbos. What a flippin headache they are. That is all:( |
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Fastback
Top Member
1500 Posts |
Posted - 10/31/2018 : 04:49:09 AM
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EGR valves, DEF tank headers and coolant flow control valves, oh my  |
Why yes, the ORIGinal CHARGER is a Fastback |
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Thomasbus24
Administrator
USA
4544 Posts |
Posted - 10/31/2018 : 06:54:03 AM
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| My staff and I are considering a gasoline bus. Never thought that would come out of my mouth (or keyboard in this case). |
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Sherm
Top Member
USA
621 Posts |
Posted - 10/31/2018 : 07:16:52 AM
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| Just dumped $5,700 into a ten-year old bus for emissions repair on a Cummins. I, too, am waiting on gasoline pricing to go along with my propane specs. #donewithdiesel |
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Fastback
Top Member
1500 Posts |
Posted - 10/31/2018 : 08:05:23 AM
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| Other than travel distances or a need for an eighty four passenger unit, its hard for me to see a plus side of owning a diesel bus. |
Why yes, the ORIGinal CHARGER is a Fastback |
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RBrian
Senior Member
United States
71 Posts |
Posted - 10/31/2018 : 08:44:35 AM
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We have bought propane Blue Birds the last two years. They are not trouble free. Out of 24 purchased the first year, 7 have had pump failures. We now have 44 of these. Roush tells me that they are working on the problem and should be coming out with a new style pump by years end.
Either way I am committed to no more diesels for us. |
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 10/31/2018 : 10:21:49 AM
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| Alot of issues with EPA whatever is dead idle, don't matter if the bus is only idling for 5 minutes it should be on high idle and with cummins you can change a parameter that will help with the driving cycle of these units(look for dpf filter temperature stabilization change it to enable then change minimum speed regen to zero)ALL FOUND IN FEATURES AND PARAMETERS just means if regening a stop will not stop it it will just keep on chugging |
OEM trained in wiring and all engine platforms for over 20 years
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RBrian
Senior Member
United States
71 Posts |
Posted - 11/01/2018 : 01:47:29 AM
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quote:
Originally posted by Bluenozer
Alot of issues with EPA whatever is dead idle, don't matter if the bus is only idling for 5 minutes it should be on high idle and with cummins you can change a parameter that will help with the driving cycle of these units(look for dpf filter temperature stabilization change it to enable then change minimum speed regen to zero)ALL FOUND IN FEATURES AND PARAMETERS just means if regening a stop will not stop it it will just keep on chugging
That parameter has been set on all of ours. Seemed to help but still have issues. |
Edited by - RBrian on 11/01/2018 01:48:59 AM |
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Shopdog
Active Member
11 Posts |
Posted - 11/14/2018 : 10:41:41 AM
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| I agree on going away from diesel engines due to the constant issues from the after treatment systems. My opinion is if you are going to have diesels you must plan on replacing them a lot sooner than we used to in the past. The costly repairs on them is crazy and it seems as though once a problem happens it just start another issue. We used to talk about engine longevity but these diesels of today are lasting just fine, it is all the extra stuff after the engine that can't survive. The cost of replacing a wore out gasoline engine can sometimes be a cheaper and better decision. Plus with gasoline we don't have to worry about cold weather issues and fuel quality issues near as much as we do with diesel. Ok that was my two cents. |
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 11/14/2018 : 11:23:42 AM
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| Another thing with these epa Cummins units is the EGR delta-p ports must be kept clean , if the port clogs can give you codes from egr cooler efficiency, frequent regen(code) egr temp. codes If the engine is not working correctly it will wreck the aftertreatment |
OEM trained in wiring and all engine platforms for over 20 years
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1Dieselman
Active Member
28 Posts |
Posted - 11/15/2018 : 05:46:31 AM
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| We must be one of the lucky one's. Most of our buses have over 200k and a few over 300k and we have very few issues with the diesels. We have a small fleet (4 sped conventional, 28 84 passenger transits, 16 routes) but we travel over 500,000 miles a year which I believe helps with the emissions systems a lot. I don't let the drivers sit at low idle more than 5 minutes. We do pull egr valves and deferential pressure sensors once a year to clean soot from the ports. We have never had to remove a scr or dpf for cleaning, but once again I believe miles traveled helps with that. We only have one short route that I would dare to consider something other than a diesel bus. |
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krmvcs
Advanced Member
362 Posts |
Posted - 11/15/2018 : 07:19:34 AM
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quote:
Originally posted by 1Dieselman
We must be one of the lucky one's. Most of our buses have over 200k and a few over 300k and we have very few issues with the diesels. We have a small fleet (4 sped conventional, 28 84 passenger transits, 16 routes) but we travel over 500,000 miles a year which I believe helps with the emissions systems a lot. I don't let the drivers sit at low idle more than 5 minutes. We do pull egr valves and deferential pressure sensors once a year to clean soot from the ports. We have never had to remove a scr or dpf for cleaning, but once again I believe miles traveled helps with that. We only have one short route that I would dare to consider something other than a diesel bus.
Ditto for me. All of my routes drive on the highways (9 routes at a min 60 and max 140 miles per day)
I have occasional issues as well but not to the extent of most short route school districts. With new emissions tech the choice of power plant anyone decides to buy needs to be motivated by how/where you need that vehicle to run. |
-Ken- |
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2010 Cummins emissions issues
