Fuel Pump Constantly Primes - Chicagoland Sportbikes
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post #1 of 49 (permalink) Old 04-11-2012, 04:22 AM Thread Starter
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Fuel Pump Constantly Primes

I'm over in Japan board out of my mind right now. I just got off work and wish I was in my garage wrenching on the bike so I thought I'd post up what I'm thinking about.

I have a 06 CRB600RR for this year. We'll see how slow I can go on this thing. It weighs about 400 pounds less than the Aprilia so that is exciting (Sorry Greg, you know I love you bro). Anyway, I swapped the suspension out to a Penske shock and Forks for my weight, put a new battery in it, changed the oil, changed the coolant and just generally going over it to make sure I don't die the first session I go around the track.

The bike starts up and runs but has kind of a stutter. Once I rev past idle it sounds good. All 4 pipes are evenly getting hot at idle off a cold engine. I noticed when the ignition is on it constantly primes the pump and if I listen closely the pump constantly runs when the engine is running as well. Usually the system on a fuel injected bike pressurizes as the computer is booting up then goes off right?I'm guessing it pressurizes as needed. It just constantly primes nonstop on this bike right now. So I noticed there's a bit of a fuel leak coming from the fuel rail going to the injectors right under the front of the gas tank.This has to be it right? If there is a purge or leak in the system and the fuel pump doesn't see or get the pressure it wants it will constantly prime correct?

I'm betting a bad o-ring in the fuel rail or a bad fuel hose somewhere. Any thoughts?

How does the fuel pump work? Does it prime until it sees a certain pressure? There's a fuel pressure regulator right? Fuel injection is new to me but I grasp the basic concept. How about a fuel pressure regulator. There are several relays on the left hand side of the bike. I'm betting on one of those controlling the fuel pump.

By the way the bike sat for maybe 2 years +/-. I'm putting my money on a rotted o-ring in the fuel rail...

I need to search / get ahold of manual for the thing....

Thanks for reading and any ideas.

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Last edited by Grasshopper; 04-11-2012 at 04:34 AM.
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post #2 of 49 (permalink) Old 04-11-2012, 04:29 AM
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not sure on your bike.


Most fuel injection systems do it 2 ways.


one is a two line system. A fuel line goes to the injectors, and there is a regulator which hold the pressure and any excess gets returned in a line that goes back to the tank.


the 2nd, is a fuel pump that bleeds excessive presure back into the gas tank.
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post #3 of 49 (permalink) Old 04-11-2012, 04:34 AM
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looks like that bike has a intank fuel pump, that probably bleeds in the tank. read the fuel pressure is like 55PSI.
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post #4 of 49 (permalink) Old 04-11-2012, 04:36 AM Thread Starter
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Quote:
Originally Posted by taledarkside View Post
not sure on your bike.


Most fuel injection systems do it 2 ways.


one is a two line system. A fuel line goes to the injectors, and there is a regulator which hold the pressure and any excess gets returned in a line that goes back to the tank.


the 2nd, is a fuel pump that bleeds excessive presure back into the gas tank.
Dude, what are you trolling on at 3:30 in the moring?

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post #5 of 49 (permalink) Old 04-11-2012, 04:37 AM Thread Starter
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Originally Posted by taledarkside View Post
looks like that bike has a intank fuel pump, that probably bleeds in the tank. read the fuel pressure is like 55PSI.
Troll me up a manual bro!!! I can't find one.

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post #6 of 49 (permalink) Old 04-11-2012, 04:44 AM
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I aint yo troll, bro

its "boss"


http://downloads.hondatech.info/Moto...e%20Manual.pdf


i'm still downloading it so i think its it
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post #7 of 49 (permalink) Old 04-11-2012, 04:46 AM
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Dude, what are you trolling on at 3:30 in the moring?

HDTony pays me with rep points to do 3rd shift tech support. Cant see why he can't outsource.
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post #8 of 49 (permalink) Old 04-11-2012, 04:50 AM Thread Starter
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Quote:
Originally Posted by taledarkside View Post
I aint yo troll, bro

its "boss"


http://downloads.hondatech.info/Moto...e%20Manual.pdf


i'm still downloading it so i think its it
I found it here as well. http://hondatech.info/... Downloading now. Quit hogging all the bandwidth

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post #9 of 49 (permalink) Old 04-11-2012, 04:51 AM
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DOH

thats the owners manual 70mb file
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post #10 of 49 (permalink) Old 04-11-2012, 04:58 AM
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post #11 of 49 (permalink) Old 04-11-2012, 05:00 AM
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the 2001-2003 is an actual service manual on that site (hondatech)
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post #12 of 49 (permalink) Old 04-11-2012, 05:05 AM Thread Starter
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DOH

thats the owners manual 70mb file
Are you fucking serious? I've been sitting here for a half hour waiting for this damn thing to download.

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post #13 of 49 (permalink) Old 04-11-2012, 05:09 AM
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this one is for the 2007 and 2008 and it does work, its a zip file thou uncompress and its a pdf

this link is for 2007
http://www.cbrextreme.com/downloads/...manual-60.html

they said the one that claims to be a 2006 is a 2003. not sure how different 2007 is
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post #14 of 49 (permalink) Old 04-11-2012, 05:21 AM
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If you got the time and bandwidth, i would do the 2007 and the one that claims to be the 2006(but really 2003-2004, according to one person)


on the cbrextreme site. both links work.
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post #15 of 49 (permalink) Old 04-11-2012, 05:27 AM
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i got no email to send that big of a file, im maxed at 25mb for upload.

Unless, someone has one that can do it for you, or try that cbextreme site.
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post #16 of 49 (permalink) Old 04-11-2012, 06:20 AM Thread Starter
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Use yousendit.com. See if it will let you send it on a trial basis

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post #17 of 49 (permalink) Old 04-11-2012, 07:56 AM
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nick pm me your addy, ive got a 07/08 service manual for the 600rr

anyways on my gsxrs there is no return line for the fuel. the pressure regulators are located on the pumps on my bikes, they just go into bypass when the pressure hits the designated number needed.

remember a few years back at gingerman when my 1000 died and would only cough when we tried to start it. the fuel pressure regulator came off the pump and was lettering the fuel freeflow curculate throught pump and right back to the tank rather than pressurizing the line. if i remember right the pump would run continuously when this happened.

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post #18 of 49 (permalink) Old 04-11-2012, 09:31 AM
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In other news - you're campaigning something that ISN'T a twin? I'm shocked!

Can't wait to get your impressions. Good luck with the fix.

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post #19 of 49 (permalink) Old 04-11-2012, 09:33 AM
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files sent

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post #20 of 49 (permalink) Old 04-11-2012, 11:17 AM
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Problem is its a Honda.
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post #21 of 49 (permalink) Old 04-11-2012, 03:04 PM
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post #22 of 49 (permalink) Old 04-11-2012, 05:41 PM

 
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I'm sure I have the manual if you need it.

On the 600 RR. Turn the key. The pump should prime for a few seconds and stop.
To do this the engine stop switch must be set to run.
The tip over switch must not be triggered.

If you get the bike to run, the you know you're getting that far.

As you stated, the pump should probably stop and just run to keep the system pressurized. I'd take the fuel rail off and be sure the o-rings are good. Put a little white lithium grease on them and reseat them.

The other thing it could be is a partially clogged fuel filter. If I recall right, that is on the pump, in the tank.

If it has a power command, I'd pull it off and try it with out it. Many people try to install the power commander themselves and install it on the primary injectors, and not the secondary injectors. (or vice versa, I don't recall). That could possibly cause a problem.

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post #23 of 49 (permalink) Old 04-17-2012, 11:01 AM Thread Starter
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Found the fuel leak. Buggered up o ring on the connection to the fuel rail

Fuel pump still runs constantly with or without the motor running. I'm verifying if this is ok.




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post #24 of 49 (permalink) Old 04-17-2012, 12:33 PM Thread Starter
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A couple questions....

The below picture. What does the pressure manifold hose actually do? Does it open and close as the required pressure is sensed?




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post #25 of 49 (permalink) Old 04-17-2012, 12:34 PM Thread Starter
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Also, what is the "Knock Sensor"

I'm looking for the fuel pressure regulator but can't find it.


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post #26 of 49 (permalink) Old 04-17-2012, 01:16 PM
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Quote:
Originally Posted by Grasshopper View Post
A couple questions....

The below picture. What does the pressure manifold hose actually do? Does it open and close as the required pressure is sensed?



tha manifold hose looks like a special tool not part of the bike

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post #27 of 49 (permalink) Old 04-17-2012, 01:18 PM
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Quote:
Originally Posted by Grasshopper View Post
Also, what is the "Knock Sensor"

I'm looking for the fuel pressure regulator but can't find it.

knock sensor is essentially a stethoscpoe that listens to the engine to hear knock(predetonation) and adjust timing accordingly if it is detected


fuel presssure reg is on the pump in the tank im betting, and wont be listed as a seperate part..

ill pull the pump out of my spare tank tonight and get you some pics nick

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post #28 of 49 (permalink) Old 04-17-2012, 01:21 PM
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You gotta make Jerry proud with putting this thing in K.O.'s face! LOL

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post #29 of 49 (permalink) Old 04-17-2012, 01:49 PM Thread Starter
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You gotta make Jerry proud with putting this thing in K.O.'s face! LOL
I don't know man. Kenny is pretty sick dude. Have you ever seen that crazy look in his eyes when he's riding well? He scares me.

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post #30 of 49 (permalink) Old 04-17-2012, 02:37 PM
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I don't know man. Kenny is pretty sick dude. Have you ever seen that crazy look in his eyes when he's riding well? He scares me.
Lol, yes I know... I was just talking smack.... I think he will podium every race this year with Hall and Farrell not racing MW classes.
I think that crazy look is the alcohol leaving his body... LULZ... He is so gonna kick my ass if he sees that...

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