F4i fuel pump not priming/injectors getting power when bike is OFF?
Thread Starter
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Member
Joined: May 2024
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From: Northern Illinois
Ill solder a 9.1V zener to it, last time I did I got 8.6V to pink wire so I ended up throwing a 10V diode on and then i get 9.5 but that was with my headlights(highbeam) fuse still on.
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Joined: May 2011
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From: Mesa, AZ
No! 9.1v is drop-amount from input. So 13v-9.1v=2.9v, way way too low.
1. show link/photo of zener you installed last time
2. show photo of how it's soldered to bottom of ignition-switch.
1. show link/photo of zener you installed last time
2. show photo of how it's soldered to bottom of ignition-switch.
Last edited by dannoxyz; May 22, 2024 at 01:45 PM.
Thread Starter
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Member
Joined: May 2024
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From: Northern Illinois
Bad solder job but im a one man army lol.
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Joined: May 2011
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From: Mesa, AZ
You’ve got it installed backwards.
Start over with my guide from beginning and post your measurements at each step. If something doesn’t match, stop and fix it so numbers are correct. Only then move onto next.
https://cbrforum.com/forum/f4i-main-...1-06-a-163487/
Start over with my guide from beginning and post your measurements at each step. If something doesn’t match, stop and fix it so numbers are correct. Only then move onto next.
https://cbrforum.com/forum/f4i-main-...1-06-a-163487/
Senior Member
Joined: May 2011
Posts: 1,988
Likes: 439
From: Mesa, AZ
What do you have in there now?
I believe factory one is 3.6-3.9v drop.
Zener diodes needs to be installed in blocking direction. Rather than completely blocking flow like regular diodes, they allow some voltage through and drop some in process.
Simple thing to do is measure before soldering:
1. Touch non-stripe end to +13v supply and measure output voltage at other end, volts = ???
2. Touch stripe end to +13v supply and measure output voltage at other end, volts = ???
I believe factory one is 3.6-3.9v drop.
Zener diodes needs to be installed in blocking direction. Rather than completely blocking flow like regular diodes, they allow some voltage through and drop some in process.
Simple thing to do is measure before soldering:
1. Touch non-stripe end to +13v supply and measure output voltage at other end, volts = ???
2. Touch stripe end to +13v supply and measure output voltage at other end, volts = ???
Last edited by dannoxyz; May 23, 2024 at 10:20 AM.
Thread Starter
|
Member
Joined: May 2024
Posts: 37
Likes: 2
From: Northern Illinois
What do you have in there now?
I believe factory one is 3.6-3.9v drop.
Zener diodes needs to be installed in blocking direction. Rather than completely blocking flow like regular diodes, they allow some voltage through and drop some in process.
Simple thing to do is measure before soldering:
1. Touch non-stripe end to +13v supply and measure output voltage at other end, volts = ???
2. Touch stripe end to +13v supply and measure output voltage at other end, volts = ???
I believe factory one is 3.6-3.9v drop.
Zener diodes needs to be installed in blocking direction. Rather than completely blocking flow like regular diodes, they allow some voltage through and drop some in process.
Simple thing to do is measure before soldering:
1. Touch non-stripe end to +13v supply and measure output voltage at other end, volts = ???
2. Touch stripe end to +13v supply and measure output voltage at other end, volts = ???
Thread Starter
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Member
Joined: May 2024
Posts: 37
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From: Northern Illinois
1-12.4v
2- 11.9v
5.4V diode
1-12.3v
2-8.7v
so perhaps i run the 5.4? If outcome is 8.7? Or should i order 3.6-3.9v diodes
Thread Starter
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Member
Joined: May 2024
Posts: 37
Likes: 2
From: Northern Illinois
You’ve got it installed backwards.
Start over with my guide from beginning and post your measurements at each step. If something doesn’t match, stop and fix it so numbers are correct. Only then move onto next.
https://cbrforum.com/forum/f4i-main-...1-06-a-163487/
Start over with my guide from beginning and post your measurements at each step. If something doesn’t match, stop and fix it so numbers are correct. Only then move onto next.
https://cbrforum.com/forum/f4i-main-...1-06-a-163487/
1- 13.9V
2a- 13.9V
2b- 13.9V
Now for 3a and 3b i solderd a 3.3V diode and its wrong
3a-13.3V
3b-13.3V
4-13.6V
5-13.6V
6- 22.3 Ohms
7- 12.8V
8- 12.8V
9a- 12.9V
9b- 12.9V
10-12.9V
11- ON O.L.
12a- O.L no beep
12b-O.L no beep
13-12.8V
14-OL no beep
15- OL no beep
16- OL With beep
Senior Member
Joined: May 2011
Posts: 1,988
Likes: 439
From: Mesa, AZ
0-12.1-14.1V
1- 13.9V
2a- 13.9V
2b- 13.9V
Now for 3a and 3b i solderd a 3.3V diode and its wrong
3a-13.3V
3b-13.3V
4-13.6V
5-13.6V
6- 22.3 Ohms
7- 12.8V
8- 12.8V
9a- 12.9V
9b- 12.9V
10-12.9V
11- ON O.L.
12a- O.L no beep
12b-O.L no beep
13-12.8V
14-OL no beep
15- OL no beep
16- OL With beep
1- 13.9V
2a- 13.9V
2b- 13.9V
Now for 3a and 3b i solderd a 3.3V diode and its wrong
3a-13.3V
3b-13.3V
4-13.6V
5-13.6V
6- 22.3 Ohms
7- 12.8V
8- 12.8V
9a- 12.9V
9b- 12.9V
10-12.9V
11- ON O.L.
12a- O.L no beep
12b-O.L no beep
13-12.8V
14-OL no beep
15- OL no beep
16- OL With beep
Again, you're wasting time by skipping ahead. Nothing after 3a 3b matters because you've got improper values.
Only thing that matters is getting diode configured properly for 9.0v output!!!
1. post photo of how you have new diode soldered in.
Last edited by dannoxyz; May 24, 2024 at 04:48 PM.