Cummins N14 Celect Plus - 14L - 1995 ish - cold idling rpm problem

Hi All

I have Cummins N14 Celect Plus - 14L - 1995 ish - cold idling rpm problem ( in a Freightliner FLB )

Engine starts and idles around 800rpm ( ish ) - then it appears when compressor turns off pressure alarm - or around that timing - rpm increaess to 1000 rpm and stays there - will not come back to the 800rpm. This would be around approx 5 minutes ( ish ) of idling.

I am guessing its a faulty sensor?

Anyone else had this problem?

Apart from that - engine appears to perform normally.

Truck has been sitting for quite a while - if that helps.

Thanking you in advance - any feedback would be appreciated.

 

Hi and thanks - idling does not return at all - thats the problem - it stays at 1000rpm which makes it hard to get into gear etc.

At around 5 minutes of idling from cold - it slowly revs up to 1000rpm and stays there.

I have not read any codes yet - I doubt anyone would select 1000rpm for idle?

 

Throttle pedal remains untouched and it still rises to 1000 rpm with no apparent input or pedal movement.

 

Will do !!

 

Yes - for under body hoist - clutch engaged.