1999 CBR600F4 - no spark at any of the 4 plugs
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@Ricky Rojan That's a message from about 5 years ago. Not sure they're still working on it. Welcome to the forum though. Thanks for posting up. Don't hesitate to introduce yourself in the New Member area.
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I'm so glad I found this!!
FINALLY !!!!!!!!!!!!!! It's ALIVE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
anyone who ever has a no spark issue on a Honda motorcycle, please read !!!!!!!
There is a diode in the switch base of the ignition switch. IF that diode pops for any reason you will have a no spark/no fuel pump issue. The value of the diode is 3.9v 0.5watt part number NTE5007A. My 99 will be back on the road soon !!!!!!!! yay ... btw, it's a friggin .39 cent part ...
anyone who ever has a no spark issue on a Honda motorcycle, please read !!!!!!!
There is a diode in the switch base of the ignition switch. IF that diode pops for any reason you will have a no spark/no fuel pump issue. The value of the diode is 3.9v 0.5watt part number NTE5007A. My 99 will be back on the road soon !!!!!!!! yay ... btw, it's a friggin .39 cent part ...
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From: Northeastern pa
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Update: As some of you may know, ummnn .. some of you may not know .. Honda incorperates a diode inside the ignition switch that when properly working, it drops the 12v battery voltage to 9vdc thru the pink wire into the ICM. I've found the diode shorted and hence allowing full battery voltage to the ICM. According to Honda this is an anti-theft device. While I soldered in a new diode, my bike still has no spark at the plugs. I'm thinking this is a proprietary part Honda uses. Even tho I matched up the diode by appearance, size and value (far as I could tell by the old one), still no spark .. damnit .... heh ..
.99/2000 CBR600F-X..PC35
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From: Mesa, AZ
hi David I have the exact problem,but I replaced the resistor (diode ). ..new icm/cdi..new ignition,plugs,etc etc..still no spark..everything work fine before I took carbs off to clean jets etc...harness is mint .everything has power etc..do u think maybe stator n or pickup?I'm confused.
.99/2000 CBR600F-X..PC35
.99/2000 CBR600F-X..PC35
So ah... what's actual voltage did you measure at pink wire going into ECU connector?
There's other causes of no-spark:
- what voltage do you measure at each ignition coil?
- do you have BAS plugged in properly?
- do you have power from kill-switch to engine-stop relay's activation coil? volts=???
- do you have continuity to chassis-ground at engine-stop relay's activation coil other side?
Last edited by dannoxyz; Nov 6, 2022 at 07:09 PM.
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Still nothing
Anyone ever come up with anything other than the diode? I've tried the diode and nothing changed. I eventually swapped the motor but would love to get this one running for a kart or other random toy.
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Joined: May 2011
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From: Mesa, AZ
Did you test and measure other components that can cause no-spark?
Stator problems will just affect battery-charging. As long as battery has sufficient voltage when cranking, stator's not causing any issues.
So ah... what's actual voltage did you measure at pink wire going into ECU connector?
There's other causes of no-spark:
- what voltage do you measure at each ignition coil?
- do you have BAS plugged in properly?
- do you have power from kill-switch to engine-stop relay's activation coil? volts=???
- do you have continuity to chassis-ground at engine-stop relay's activation coil other side?
So ah... what's actual voltage did you measure at pink wire going into ECU connector?
There's other causes of no-spark:
- what voltage do you measure at each ignition coil?
- do you have BAS plugged in properly?
- do you have power from kill-switch to engine-stop relay's activation coil? volts=???
- do you have continuity to chassis-ground at engine-stop relay's activation coil other side?
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Senior Member
Joined: May 2011
Posts: 1,988
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From: Mesa, AZ
Well, wire can be broken internally and not show any faults on outside. We'll have you test and measure every wire with multimeter later.
1. how have you verified no-spark?
2. is there petrol flow to carbs? as in measured fuel-pump flow for 10-sec? How much did you collect?
3. disconnect ignition-module, key ON, measure voltage at black wire terminal at connector. Volts=???
4. measure resistance to chassis-ground of grn wire at connector. ohms = ???
5. measure resistance to chassis-ground of lite-grn wire at connector. ohms = ??
1. how have you verified no-spark?
2. is there petrol flow to carbs? as in measured fuel-pump flow for 10-sec? How much did you collect?
3. disconnect ignition-module, key ON, measure voltage at black wire terminal at connector. Volts=???
4. measure resistance to chassis-ground of grn wire at connector. ohms = ???
5. measure resistance to chassis-ground of lite-grn wire at connector. ohms = ??
Last edited by dannoxyz; Dec 17, 2022 at 11:13 PM.