Engine power decreases after few minutes of operating.

[sdw363]

I can start the engine and operates normal for a few minutes then it gradually decreases in power, from 100% to 90% to 80% and so on. Have changed fuel and air filters a couple fuel lines. Cleaned and flushed fuel tank and changed pickups. Any suggestions or recommendations I would really appreciate it. Thanks in advance.

 

[polishpete]

what machine

 

[polishpete]

sounds to me issue withg fuel

 

[mrbb]

compression? how many hours on motor?

 

[sdw363]

Machine is John Deere 323D 2012. Has 2116 hours on engine

 

[sdw363]

Machine is John Deere 323D 2012. Has 2116 hours on engine

 

[polishpete]

its eother fuel or low compression

 

[thwerench]

By decrease in power do you mean you lose RPM ?

 

[Topper1]

More info needed on the circumstances around power, rpm, response loss. What is the machine actually doing?? Losing power? Rpm? Rough temps and situation would help a lot.
Could be almost anything without proper diagnostic description of events.

 

[oiu789]

Does it have a ecm? Any codes? Run it till it looses power re prime the fuel system and see if there is any air in the system

 

[sdw363]

After the bell rings a message appears (Eng Dehydrant) but no codes. The engine don't sound like the RPM is going down. Has no DEF.

 

[sdw363]

Warning bell dings then message on screen "Engine Derate 99%" then will continue to go decrease. Gets to around 65% and machine will move very slowly. No loss of RPM engine stays at RPM level. Have changed filters fuel and hydraulic, some lines, cleaned and flushed fuel tank, changed alternator, and changed battery. I don't get another code other Engine Derate.
2012, John Deere 323D approx. 2120 hours om machine. Any assistance is much appreciated. Thank you

 

[mrbb]

I would be checking compression
do you notice any certain TEMP that things starts to go downhill at?
as is, when it reached "X" temp, it starts to loose power