Stalling when slowing down
#11
#12
#14
ive been reading in the workshop manual, here is what i find.
If, during engine idle, the load on the engine is
increased sufficiently to cause engine speed to fall,
the ECM will sense this via the crankshaft sensor and
instantly advance the ignition timing to increase idle
speed and then energise the stepper motor to open
the throttle disc thus maintaining the idle speed.
Finally the ignition timing is retarded to its nominal
value.
The ECM monitors battery voltage and, if voltage falls
sufficiently to cause fluctuations in injector pulse
widths, it increases the injector pulse widths to
compensate.
On return to idle, the ECM will implement a slightly
higher idle speed to prevent the engine stalling.
So does that mean if the battery amperage is low, like mine, that it could cause this semi serious issue. It could be a bad crankshaft sensor, stuck iacv, tps. My god a mechanical 300 tdi sounds amazing right now.
more in the morning.
If, during engine idle, the load on the engine is
increased sufficiently to cause engine speed to fall,
the ECM will sense this via the crankshaft sensor and
instantly advance the ignition timing to increase idle
speed and then energise the stepper motor to open
the throttle disc thus maintaining the idle speed.
Finally the ignition timing is retarded to its nominal
value.
The ECM monitors battery voltage and, if voltage falls
sufficiently to cause fluctuations in injector pulse
widths, it increases the injector pulse widths to
compensate.
On return to idle, the ECM will implement a slightly
higher idle speed to prevent the engine stalling.
So does that mean if the battery amperage is low, like mine, that it could cause this semi serious issue. It could be a bad crankshaft sensor, stuck iacv, tps. My god a mechanical 300 tdi sounds amazing right now.
more in the morning.
#16
Yes a series one ore two would be amazing to have, what i really want is a defender 110.
So this morning i
cleaned the iacv, wasnt that dirty. While doing so i managed to snap one of the very small bolts.
checked all the grounds, did another parasitic battery loss test, 0.03.
and nothing i pulled changed that.
pulled out the ecm and opened it up, no water, corrosion, or issues.
I also check continuity between the alternator and batter, good to go.
So im wondering if the battery is bad. or if i should use my eod training and blow this thing to high heavens.
So this morning i
cleaned the iacv, wasnt that dirty. While doing so i managed to snap one of the very small bolts.
checked all the grounds, did another parasitic battery loss test, 0.03.
and nothing i pulled changed that.
pulled out the ecm and opened it up, no water, corrosion, or issues.
I also check continuity between the alternator and batter, good to go.
So im wondering if the battery is bad. or if i should use my eod training and blow this thing to high heavens.
#18
#19
Yes a series one ore two would be amazing to have, what i really want is a defender 110.
So this morning i
cleaned the iacv, wasnt that dirty. While doing so i managed to snap one of the very small bolts.
checked all the grounds, did another parasitic battery loss test, 0.03.
and nothing i pulled changed that.
pulled out the ecm and opened it up, no water, corrosion, or issues.
I also check continuity between the alternator and batter, good to go.
So im wondering if the battery is bad. or if i should use my eod training and blow this thing to high heavens.
So this morning i
cleaned the iacv, wasnt that dirty. While doing so i managed to snap one of the very small bolts.
checked all the grounds, did another parasitic battery loss test, 0.03.
and nothing i pulled changed that.
pulled out the ecm and opened it up, no water, corrosion, or issues.
I also check continuity between the alternator and batter, good to go.
So im wondering if the battery is bad. or if i should use my eod training and blow this thing to high heavens.
#20