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 2006 DT466 school bus rpm up and down		  New Topic  Reply to Topic
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peter2019
Senior Member

125 Posts
Posted - 09/26/2022 :  06:11:02 AM  Show Profile  Visit peter2019's Homepage  Reply with Quote
2006 DT466 act funning, mostly happen after half hour or more driving, engine start rpm up and down when driving around 50-60KM per hour speed, once rpm down to almost stop then jump up to 2000 again, like choke, any idea? Thanks

valleybusman
Top Member

USA
812 Posts
Posted - 09/26/2022 :  11:48:29 AM  Show Profile  Send valleybusman an AOL message  Reply with Quote
2 things come to mind . Air leak in the system or high pressure oil pump ? ?
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g0ttadrift
Advanced Member

USA
258 Posts
Posted - 09/27/2022 :  04:28:16 AM  Show Profile  Reply with Quote
Take a look at the MAP sensor and see if it's reading correctly.
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