CM2250 low power poor mileage
10-25-2022, (Subject: CM2250 low power poor mileage ) 
Post: #37
RE: CM2250 low power poor mileage
So the actuator is open or closed it doesn't actually meter the fuel?
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10-25-2022, (Subject: CM2250 low power poor mileage ) 
Post: #38
RE: CM2250 low power poor mileage
(10-25-2022 )Rockinbexpress Wrote:  Rawze I wouldn't think carbon packing would be an issue as this motor was demandated out of the box 3 years ago. Would you?

...

(10-25-2022 )Rockinbexpress Wrote:  I just got the oil sample back and everything is good. No carbon, fuel or water.

That does not mean anything.

Only turning the engine by hand and knowing how tight one usually is to turn will reveal how much resistance the engine has.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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10-25-2022, (Subject: CM2250 low power poor mileage ) 
Post: #39
RE: CM2250 low power poor mileage
Would there be a metric to use (ie a in/lb torque wrench) to give an idea?
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10-25-2022, (Subject: CM2250 low power poor mileage ) 
Post: #40
RE: CM2250 low power poor mileage
(10-25-2022 )hookliftpete Wrote:  Would there be a metric to use (ie a in/lb torque wrench) to give an idea?

not really, as it varies widely while turning due to compression strokes, how fast you turn it by hand, etc.

I have turned a lot of engines by hand over the years. mostly due to showing people how to run their overhead valve adjustment, etc.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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 Thanks given by: hookliftpete
10-26-2022, (Subject: CM2250 low power poor mileage ) 
Post: #41
RE: CM2250 low power poor mileage
I found a bad washer on the pressure side of the transfer pump so I replaced the transfer pump while I was in there. It's still surging but not as bad and the water separator fills up alot faster seems like the surging gets worse the longer it runs. It's also loping at idle when it's cold. I'm fixing to pressure up the suction side and test for leaks now
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10-26-2022, (Subject: CM2250 low power poor mileage ) 
Post: #42
RE: CM2250 low power poor mileage
I ran 3 more leak tests and it drops 1400 psi in 60 seconds all 3 times
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10-27-2022, (Subject: CM2250 low power poor mileage ) 
Post: #43
RE: CM2250 low power poor mileage
If the electric pump is surging (ramping up and down) it is sucking air somewhere
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 Thanks given by: Rawze
10-27-2022, (Subject: CM2250 low power poor mileage ) 
Post: #44
RE: CM2250 low power poor mileage
It's the high pressure pump
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10-28-2022, (Subject: CM2250 low power poor mileage ) 
Post: #45
RE: CM2250 low power poor mileage
You can guessing until retirement and never fix the problem without proper testing procedure from
Cummins Quickserve.
   
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