Levett47
XS650 Member
Hi Pete,
Long time reader, first time user. I have a 1979 xs650 special with a pamco ignition + e advancer.
I have a very strange problem where the engine will fire and run beautifully but cut out immediately on release of the starter button.
To this day I have;
- Cleaned and rebuilt carbs twice and installed new jets.
- Rebuilt petcocks.
- Replaced spark plugs with brand new ones.
- Replaced battery with new dry cell.
- Isolated and bypassed starter switch.
- Removed, cleaned and tested charging system (rotor, stator, brushes and Bakelite block)
- Inspected and tested all charging system wires for damage and replaced heat shielding.
- Checked and tested all plug connections (complete new wiring system with motogadget m-unit control unit)
- Tested coil for damage (terminals, plugs and ground)
- Checked spark on both sides. (One at a time always grounding both while checking)
- Checked all grounding points.
- Bypass wire from batt + to coil to check for switch damage.
- Bypass ground wire from e advancer to batt -.
- Checked and replaced all connections twice from coil back to the sensor.
- Checked and replaced all connections from coil back to ign switch.
- Isolated all lights and horn to leave only engine electrics connected.
- Switched plug wires on engine.
- Switched terminal wires on coil.
Nothing has worked and still have the same problem. The engine runs amazing on the starter but cuts without any splutter as soon as I let go of the button. + to coil doesn't cut out though.
I have narrowed it down to the e advancer unit and noticed that there is an auto kill function on that chip to stop the coil from getting ignition until the engine has started.
Could the chip be failing to sense that the engine has started??
Long time reader, first time user. I have a 1979 xs650 special with a pamco ignition + e advancer.
I have a very strange problem where the engine will fire and run beautifully but cut out immediately on release of the starter button.
To this day I have;
- Cleaned and rebuilt carbs twice and installed new jets.
- Rebuilt petcocks.
- Replaced spark plugs with brand new ones.
- Replaced battery with new dry cell.
- Isolated and bypassed starter switch.
- Removed, cleaned and tested charging system (rotor, stator, brushes and Bakelite block)
- Inspected and tested all charging system wires for damage and replaced heat shielding.
- Checked and tested all plug connections (complete new wiring system with motogadget m-unit control unit)
- Tested coil for damage (terminals, plugs and ground)
- Checked spark on both sides. (One at a time always grounding both while checking)
- Checked all grounding points.
- Bypass wire from batt + to coil to check for switch damage.
- Bypass ground wire from e advancer to batt -.
- Checked and replaced all connections twice from coil back to the sensor.
- Checked and replaced all connections from coil back to ign switch.
- Isolated all lights and horn to leave only engine electrics connected.
- Switched plug wires on engine.
- Switched terminal wires on coil.
Nothing has worked and still have the same problem. The engine runs amazing on the starter but cuts without any splutter as soon as I let go of the button. + to coil doesn't cut out though.
I have narrowed it down to the e advancer unit and noticed that there is an auto kill function on that chip to stop the coil from getting ignition until the engine has started.
Could the chip be failing to sense that the engine has started??