19-04-2012, 03:45 PM
Have you removed the coldstart spring from inside the pump?
If not, I would disconnect the thermostat cable, set it right, then you know it's not going to arse about when it gets warm. The reason it goes into that wierd mode where at a guess it drops to about 500rpm and just shudders and jumps around? That's because the governor speed slows enough that it can't control the throttle enough to bring the idle back up... That's your antistall not working properly...
Have you tried putting in the throttle min stop just to bring the throttle off the stop, that can often help just having the throttle held up a bit - from there you can adjust the hot and cold idle adjusts on the back of the pump.
If not, I would disconnect the thermostat cable, set it right, then you know it's not going to arse about when it gets warm. The reason it goes into that wierd mode where at a guess it drops to about 500rpm and just shudders and jumps around? That's because the governor speed slows enough that it can't control the throttle enough to bring the idle back up... That's your antistall not working properly...
Have you tried putting in the throttle min stop just to bring the throttle off the stop, that can often help just having the throttle held up a bit - from there you can adjust the hot and cold idle adjusts on the back of the pump.
