cbr f4 wont start fuel problems and solutions

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Old Oct 11, 2013 | 10:12 PM
  #1  
--*CBR*KING*--'s Avatar
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cbr f4 wont start fuel problems and solutions

Hi everyone for everyone having this problem that sounds like fuel starvation i have been threw this twice. First off make sure your fuel pump is working take it loose and get two spare shorter single wires. Plug them up to the sepretely in the wires from the fuel pump run them to positive and negative to your battery also known as jumpering your fuel pump manually see if it works. If it cuts on your problem is in your relays usually not the fuel cut relay (3 prong) but your fuel pump power relay (5 prong). These are a big factor for your fuel pump not turning on thats what it runs off of are those relays. I found a power relay (5 prong) on ebay for 8 bucks when if you go to the stealership it runs usually 40 to 60 bucks <-- rediculous smh... But mine still after replacing that power relay (5 prong) didnt start. So i very easily gravity feed the carbs and it started. Let it run for a minute, and wired the fuel pump back up and boom fired right up i got another thread for overflow coolant tank spewing and boiling coolant i know alot about a 2000 cbr f4 just ask me thanks hope everyone gets up n running

Last edited by --*CBR*KING*--; Oct 11, 2013 at 10:15 PM.
Old Sep 30, 2020 | 02:28 AM
  #2  
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Re: cbr f4 wont start fuel problems and solutions

Originally Posted by --*CBR*KING*--
Hi everyone for everyone having this problem that sounds like fuel starvation i have been threw this twice. First off make sure your fuel pump is working take it loose and get two spare shorter single wires. Plug them up to the sepretely in the wires from the fuel pump run them to positive and negative to your battery also known as jumpering your fuel pump manually see if it works. If it cuts on your problem is in your relays usually not the fuel cut relay (3 prong) but your fuel pump power relay (5 prong). These are a big factor for your fuel pump not turning on thats what it runs off of are those relays. I found a power relay (5 prong) on ebay for 8 bucks when if you go to the stealership it runs usually 40 to 60 bucks <-- rediculous smh... But mine still after replacing that power relay (5 prong) didnt start. So i very easily gravity feed the carbs and it started. Let it run for a minute, and wired the fuel pump back up and boom fired right up i got another thread for overflow coolant tank spewing and boiling coolant i know alot about a 2000 cbr f4 just ask me thanks hope everyone gets up n running
hey there,so I got a 2000 CBR F4 that currently won't start I have tried many things and nothing seems to work at first I was getting relay clicks and everything turns out my diode blew in the ignition change that among other things and it just seemed to be one problem after another so I'm looking for a little help the point on that right now is trying to figure out why when I turn my key over I get no relay clicks no fuel Prime yet I am getting spark and it cranks so I'm looking for a little help to get my bike back on the road cuz I miss it thank you very much in advance
Old Apr 5, 2022 | 11:42 AM
  #3  
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Re: cbr f4 wont start fuel problems and solutions

Originally Posted by jessejames818
hey there,so I got a 2000 CBR F4 that currently won't start I have tried many things and nothing seems to work at first I was getting relay clicks and everything turns out my diode blew in the ignition change that among other things and it just seemed to be one problem after another so I'm looking for a little help the point on that right now is trying to figure out why when I turn my key over I get no relay clicks no fuel Prime yet I am getting spark and it cranks so I'm looking for a little help to get my bike back on the road cuz I miss it thank you very much in advance
Hello...you blowed that ignition resistor

You can directly attach diode/resister between pink wire heading ecu.
Fuel pump should prime. If u r gravity fed then put some fuel from throat and pull choke or still dont fire then check ignition 9v pink wire diode/resistor...
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