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go-west..
go-west.., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 1152
Experience:  Technican with 20 years experience focused on engines and electrical.
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I have a 3126. Ser# 7as40375. Hard to start when warm.

Customer Question

I have a 3126. Ser# ***** Hard to start when warm. Starts fine cold. Replace injector cups, o rings, pressure control valve and sensor in head. Put gauge in head. When cranking the pressure is 1000 then it shoots up to 2200, then back down to 1100 when idling. I'm going to dead head the pump and check pressure. How much oil should come out the spill ports on the injectors. None or very little.
Submitted: 1 month ago.
Category: Medium and Heavy Trucks
Expert:  go-west.. replied 1 month ago.
Good evening
Surprisingly a fair bit of oil comes out of those ports, the thing that you look for is one that spits out more that the rest.
Expert:  go-west.. replied 1 month ago.
Good morning I see the question is still open, do you have any other questions
?
Expert:  go-west.. replied 1 month ago.
Good morning
How did it go?