Cat c9 engine

[john hofer]

Cat c9 acert , did a rebuilt,first start it started right away, tried again no start,let it sit overnight started again ran a few minutes and slowly died,wont start again unless sitting a long time.i can hand pump the fuel to 60 lbs ,as soon as i stop perssure drop to 0 lbs my question is, is the fuel pressure suppose to hold when i stop pumping?

 

[tekemp]

What is the fuel pressure when it does run?

 

[john hofer]

about 85

 

[john hofer]

Sorry, 65 lbs

 

[CaptainAnalyzer]

I think you have an injector with a serious leak.

 

[john hofer]

So if hand pump the fuel to 60 lbs
The pressure should be consant if not I have a leak?

 

[CaptainAnalyzer]

Correct

 

[CaptainAnalyzer]

Either an injector is passing fuel through it internally and is draining back to the return, or its leaking around the orings up around the injector into the valve cover.