• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Cat 239d stumble when warmed up

J

JEDiag

Member
Joined
Mar 9, 2024
Messages
7
Location
Ohio
Hey guys, I have a 239d im working on that has a stumble and loss of power after its warmed up. Only starts after about 172⁰ and gets worse the warmer it gets. No codes, no inactive codes. Have had laptop hooked up and everything checks from what I can see. I did notice injector cut out test showed number 2 compensation a little low but it isnt by a lot and doesnt seem consistent. It does act like an injector going and is real present under a load at higher rpm. Fuel pressure always reads fine too. If i get temp up in the 190 range it gets alot worse and will stumble under no load high rpm until i drop rpm for a short period, maybe 15 seconds, then itll smooth back out some. Really seems like fuel supply but it all checks ok. Hate to condemn an injector on a slightly low comp value but its really the only lead I have. Any Ideas?
 
S

Simon C

Senior Member
Joined
Jul 1, 2015
Messages
3,039
Location
Rocky Mountain House , AB., Canada
Occupation
Heavy Equipment Mechanic
Be a good idea to post your serial number, how many hours on unit and anything else in terms of history on the unit. If the injector starts to leak by it can put bubbles into the common rail and cause loss of power.
Simon C
 
You must log in or register to reply here.
Top