Anyone had problems with the auto idle on one of these Volvo ec27 machines??
I've no idea if the 27c use the same system as the 27d i have, or what the problem is but on both a 25d and 27d i've had a problem with the revs briefly increasing as you stop the machine when auto idle is engaged. With the help of
@CPS and others i worked out that the solenoid that operates the auto idle system try's to override the stop solenoid on the injection pump. Purely by coincidence i started using GTL diesel which is cleaner than the average crap we now have from the pumps and the problem disappeared after a short while.
Impossible to prove but my theory is the GTL cleans the internals of the pump better than regular diesel and there's less resistance on the stop solenoid as it moves the rack to the stop position and the auto idle solenoid doesn't have a chance to increase the revs before the engine stops.?
another cause could be poor connections or weakness of the stop solenoid ?
There's a thread here somewhere (volvo ec27revs)