fuel pump priming question - TwoWheelForum: Motorcycle and Sportbike forums
 
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post #1 of 10 (permalink) Old 01-31-2007, 09:59 PM Thread Starter
 
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fuel pump priming question

Hey guys/gals. I just bought a 05 CBR f4i , the bike has some damage. The guy I got the bike from was starting it buy placing a jumper wire inbetween the two starter relays @ the back of the bike (to get the fuel pump to prime, gauges seem to working fine). The damage looks to be cosmetic so I dont know if there is some safety switch or relay bad , can any1 give me a good place to start looking. Thanks , Todd
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post #2 of 10 (permalink) Old 02-01-2007, 09:32 AM
 
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.

o0, check all the wires.. trace them make sure there isnt somthing wrong.

im not sure on this one :S
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post #3 of 10 (permalink) Old 02-01-2007, 11:01 AM
 
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i've checked the fuses so far so good , next i'll try to find a wiring dia. and start tracing. Is there a way to check relay , with a meter?
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post #4 of 10 (permalink) Old 02-01-2007, 01:56 PM
 
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Quote:
Originally Posted by Todbo View Post
i've checked the fuses so far so good , next i'll try to find a wiring dia. and start tracing. Is there a way to check relay , with a meter?
yeah ohms about 500 ohms or so..
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post #5 of 10 (permalink) Old 02-01-2007, 06:16 PM
 
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might it be the tipover sensor? if I remember right on the F4i, its somewhere up near the windscreen, or behind the fairings on the front.
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post #6 of 10 (permalink) Old 02-02-2007, 07:10 AM Thread Starter
 
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Ok , thats what I was wondering , if some of the "safety switches" disabled the fuel pump.
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post #7 of 10 (permalink) Old 02-02-2007, 11:44 AM
 
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thanks , King , I looked over my wirning dia , and sure enough there is a "eng stop relay" in between the headlight & turn signal in the front fairing , my only problem is ......... that front sub harness did not come with my bike , fairing was damaged , i thought the headlight & turn sig we're the only thing in that sub harness , but if that eng stop realy is missing also , I'm sure that must causing some problem if not my current one!
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post #8 of 10 (permalink) Old 02-02-2007, 09:58 PM
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You should be able to bypass that switch... either it completes the positive circuit or goes to ground. The diagram should show you...

trcbr... all those safeties kill the fuel pump... no fuel.. no motor running!




-Chris
aka Gas Man



Was: 2002 Kaw ZX-9R
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is me till the
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post #9 of 10 (permalink) Old 02-02-2007, 10:10 PM Thread Starter
 
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Thanks Gas man , that was my next question , how the switches disable the bike , sounds like I've found my FP problem. I'm working on a headlight and harness as we speak.
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post #10 of 10 (permalink) Old 02-03-2007, 07:37 PM
 
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the tip over sensor you are talking bout is know as a bank angle sensor, basically if the bike is leaned over to far the engine will shut down. basically a fail safe!

Check for voltage at the fuel pump relay. you should read battery voltage when the key is tuned on if i can remember and you shold obviously hear it prime. power will be comming from the main fuse to it and is normally controlled by the ICM or ECM if i can remember?
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