jet mechanic
Well-known member
2007 Fjr, A , 65000 miles, no previous issues,
The bike had been sitting for 3 weeks during a new house move. Went to start it, gauges swept, heard the fuel pump, the engine chugged once but no start. Tried again and the engine is spinning but there seems to be no ignition.
Tried WOT and can smell fuel but no chugging.
Checked the ignition fuse, it was good.
The engine is turning over so I don't believe it can be a safety switch or the ignition switch.
Went straight to the coil packs since the engine is turning over and found the following;
The red/black on the outer coil pack, and the red double blue dot leads on the inner coil pack, had 12 volts.
The orange (outer coil pack)and the gray/red wires (inner coil pack) which come from the ecu were dead, which means they are grounds, checked the ohms and they both read .22ohms.
Did a resistance check on the primary coil side of the packs and both read .2 ohms. Did not bother with the secondary since I just don't think they would both go bad.
Checked all spiders and all look and checked good.
Since this mean the ecu controls the ground for ignition should I be looking at a crank sensor?
What else can effect the ecu which would allow the engine to rotate but no ignition?
Can you have a bad crank sensor with no fault code showing?
Will be waiting for words of wisdom from the forum guru's and thank you guys in advance for any assistance.
The bike had been sitting for 3 weeks during a new house move. Went to start it, gauges swept, heard the fuel pump, the engine chugged once but no start. Tried again and the engine is spinning but there seems to be no ignition.
Tried WOT and can smell fuel but no chugging.
Checked the ignition fuse, it was good.
The engine is turning over so I don't believe it can be a safety switch or the ignition switch.
Went straight to the coil packs since the engine is turning over and found the following;
The red/black on the outer coil pack, and the red double blue dot leads on the inner coil pack, had 12 volts.
The orange (outer coil pack)and the gray/red wires (inner coil pack) which come from the ecu were dead, which means they are grounds, checked the ohms and they both read .22ohms.
Did a resistance check on the primary coil side of the packs and both read .2 ohms. Did not bother with the secondary since I just don't think they would both go bad.
Checked all spiders and all look and checked good.
Since this mean the ecu controls the ground for ignition should I be looking at a crank sensor?
What else can effect the ecu which would allow the engine to rotate but no ignition?
Can you have a bad crank sensor with no fault code showing?
Will be waiting for words of wisdom from the forum guru's and thank you guys in advance for any assistance.