6LP is not like the 6LY or 4JH. LP solenoid is screwed into the inj pump and is energize to run. LY and JH solenoid is external to pump and is energize to stop.
To find out if it is a sticky solenoid, get someone to hit stop button/switch/whatever and see if volts vanish from solenoid terminal. I don't think there is a relay involved like there is on the LY and JH (from current pull consideration). Could be wrong, though.
|