Fuel pump not priming - CBR Forum - Enthusiast forums for Honda CBR Owners

F4i - Main Forum Main F4i discussion board

Fuel pump not priming

Reply

 
 
 
  #1  
Old 09-15-2018, 04:16 PM
Senior Member
Thread Starter
Join Date: Jan 2012
Location: Stockton, CA
Posts: 258
Default Fuel pump not priming

I plan to bypass all the other sensors like kickstand and bank angle sensors, but first i need help with jumping the fuel pump. I tried jumping it with a wire with the bike on and kill switch but did not work. Just wanted to know what that means exactly..is the whole fuel pump bad? I even swapped both relays but i doubt both went bad.
 
Reply With Quote
  #2  
Old 09-17-2018, 06:39 PM
Junior Member
Join Date: Jul 2017
Location: Cambridge, MN
Posts: 6
Default

If you're bypassing the BAS, make sure you do it right. It could be the reason its not priming, or starting at all. It will turn over but will never fire. The kickstand switch only applies when the bike is in gear, so it wont stop the bike from starting or running in neutral with it down. And i do believe there are only 2 relays that would not let the pump prime if they were bad, the two towards the rear of the bike. Its possible the wiring to the pump is flipped, or some other electrical problem harness related. Also make sure the kill switch is in the run position. But, worst case scenario, you might have a bad pump
 
Reply With Quote
  #3  
Old 09-23-2018, 02:31 AM
Senior Member
Thread Starter
Join Date: Jan 2012
Location: Stockton, CA
Posts: 258
Default

Replaced my fuel pump and bike started right up. Primed and everything. Let it run for 5min turned it off. Hooked up some fairings. Tried to start it, Pump no longer primes again. Wtfff
 
Reply With Quote
  #4  
Old 09-23-2018, 07:50 AM
Doc Samson's Avatar
Junior Member
Join Date: May 2018
Location: Winchester, VA
Posts: 28
Default

Originally Posted by omg209 View Post
Replaced my fuel pump and bike started right up. Primed and everything. Let it run for 5min turned it off. Hooked up some fairings. Tried to start it, Pump no longer primes again. Wtfff
Hate it when that type of stuff happens! Makes me feel like taking a sledge hammer to something! I have no other input but hope you get it sorted out and am interested to know what the problem is...
 
Reply With Quote
  #5  
Old 09-23-2018, 03:31 PM
Senior Member
Thread Starter
Join Date: Jan 2012
Location: Stockton, CA
Posts: 258
Default

I jumped my fuel relay but no fuel pump prime. However when I connect the fuel pump directly to the battery it does spin. So not sure if fuel pump is bad or not. As for the ignition diodes I'm getting 8v instead of the 9. Battery is well maintained with battery tender overnight. Not sure how to get that pink wire voltage any higher, a zener diode would make the problem worse for me. Any input is appreciated.
 
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Lukedive97
General Tech
20
06-01-2018 09:07 AM
Cmarchandpr
F4i - Main Forum
4
06-19-2013 06:04 PM
decannon04
General Tech
4
05-22-2012 08:49 PM
Adrjunkie
F4i - Main Forum
9
06-22-2009 08:38 PM
03bladeRunneR
CBR 954RR
0
03-21-2006 02:47 AM


Thread Tools
Search this Thread
Quick Reply: Fuel pump not priming


Advertising
Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.