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DR.Cummins
DR.Cummins, FIELD SERVICE TECHNICIAN
Category: Heavy Equipment
Satisfied Customers: 3541
Experience:  16 Years working on Cummins Diesel engines,
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97 n14 cummins that started idling rough..run fine..pulling..hill

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Hi i have a 97 N14 cummins that started idling rough between 600 & 900 rpm but seems to run fine when driving but has been sounding like a locomotive or slight knocking noise when im pulling a heavy load or going up a hill
hello are there any check engine lights on when this happens?
Customer: replied 5 years ago.
no
Ok some common causes of a miss with out codes is an improper overhead setting (valves and injectors) an engine position sensor, (check for bubbles on the face and oil intrusion through the connector) or a injector starting to fail you would need to do a cylinder cut out test under the circumstance that it happens to detect
Customer: replied 5 years ago.
The truck has 717000 miles and the center head was redone 17000 miles ago . Do you think i should get it checked out first before i look into the fuel system
Yes i would let a shop look into it with the computer software first. An engine with that kind of mileage on it would normally be due to get ALL injectors replaced IF one or 2 just get done the older ones fail not to soon after.
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