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roybelding, Shop Foreman Freightliner trucks
Category: Medium and Heavy Trucks
Satisfied Customers: 5839
Experience:  Shop Froeman for Freightliner Trucks
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2010 WS with 60 ser w/ egr dpf, eng # 06R01029777 Truck came

Customer Question

2010 WS with 60 ser w/ egr dpf, eng # ***** Truck came to shop with miss/surge type behaviour... almost like accelerator issues but also does it with hi idle & cruise....checked for fault codes...none... checked for air in fuel...found lots of air coming return line...removed injectors...#3 bypass compression...replaced all 6 cups & injector engine...does same surge/flutter....check for air in fuel again...good...cylinder cut out doesn't produce any results or change....wondering about intake psi code..unplug it & produces code but it runs smoother...its so bad...truck can't be used...any ideas ???
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  roybelding replied 1 year ago.

good evening my name is ***** ***** I will assist

the most common issue for this is the delta p sensor. the ports get clogged and the result is your complaint. I would remove the sensor and check the ports all the way down


Customer: replied 1 year ago.

ok, its not there, has there been an update kit, I think it has but not familiar with it... checked further...yes.. has Detroit update kit #23538485 which has replaced the delta-p sensor & related plumbing.. so inspired to try to unplug the mixer valve in closed position before starting truck....throws code but runs well & smooth as well as boost behaving smooth....plug it in and instantly back to old ways... Now wondering if that valve could be having mechanical issues or why not throwing codes ????

Expert:  roybelding replied 1 year ago.

there needs to be a delta p sensor. who and why did they remove it and what did they replace it with

Customer: replied 1 year ago.

check the Detroit update kit #

18SP654* – EPA07 Series 60


Delta Pressure

Sensor Removal Kits

(P/N: 23538484 and 23538485)

That's what is installed on this truck. I don't know by whom but no work has been done on this engine for well over a year. I'm very familiar with pre-EGR Detroits but not these. What or how the new mixing valve is controlled or psi's determined is what I'm wondering ???
Expert:  roybelding replied 1 year ago.

let me do some research on this


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