WOT Bogging issue - 600RR.net
Exhaust & Fuel Delivery Tips on how to get the most out of your bike

 
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post #1 of 4 (permalink) Old 06-18-2014, 04:47 AM Thread Starter
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WOT Bogging issue

Pick ya brains people ? 03 cbr 600 rr recently developed a fault at WOT any gear get an initial hesitation or bog down then passes through, at any rpm so if have the throttle half open upto 10k then wack it open will get an intial bog down or fuel cut it feels like then pulls through slowly applying throttle bike seems to be fine all the way through the rev range and at an stand still bike idles and rev perfect WOT or not seems to be only when under load, Did have k&n and akroprovik link and box and powercommander 3 , i have since removed the k&n and put to standard and disconnected the power commander still got the exhaust on tested inbetween the chages and the problem persists.
so im starting to think fuel pump or tps any other suggestions. ?
Has anyone seen this or had this ?
Also from what i have seen in the forum the fuel pump needs to be 50lph but i cant test this and also the ones on ebay seem to rated slightly less
any suggestion on this too :Maximum pressure: 4.5-6.0 Bar / Operational pressure: 3 Bar / Flow Rate: 35 LPH will a pump with this spec be sufficient?
Thanks Guys
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post #2 of 4 (permalink) Old 06-18-2014, 04:48 AM Thread Starter
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Joe Sveum Bad fuel injector. Mine did the same thing. You have an injector stuck open
13 June at 12:36 Like

Donovan how did u find out which one? if had the bike running with the airbox open so i its not the high speed ones in the top and with ignition on and opened the butterflys in th TB and i cant see any fuel flowing ?
13 June at 12:40 Like

Donovan Cheers buddy
13 June at 12:40 Like

Joe Sveum i replaced the lower ones
13 June at 12:49 Like

Donovan is there a way i can test like take the tb off with everything connected ignition on and turn back wheel slowly in gear will this pulse each one and i could see which one not working correctly would this work as a test ?
13 June at 12:52 Like

Joe Sveum if your not mechanically inclined to swap them take it to a shop. what your asking makes no sense. turning the back wheel has nothing to do with injector pulse. and if you can turn the back wheel with it in gear then props to your super human strength.
13 June at 12:56 Like

Donovan would be same as bump starting it no? ok maybe turnthe engine over with plugs out and all ignition on then the injectors should fire right ?its only the compression that makes it hard to turn with it in gear im mechaniclly minded and dont see a problem...See More
13 June at 12:59 Like

Joe Sveum just replace them. i spent $40 on a used set
13 June at 13:02 Like

Donovan ill see what the ol ebay has to offer
13 June at 13:06 Like

Erik Johnson Replace all 4 if you only replace one it will be aame problem Because now one is 100% and other 3 are used so now they will flow less.... also clear the throttle bores and the butterflys. They tend to get gunked up quicker with a kn filter.. carb cleaner and tooth brush
13 June at 13:19 Like

Eric Shaw I had this and it was my exup valve. Came disconnected
14 June at 07:49 Like

Joe Sveum No exup on a 03
14 June at 12:50 Like

Eric Shaw I wasn't sure
14 June at 16:17 Like

Donovan Well I just ordered a set of 05 throttle boddies with tps and injectors included for 60 delivered so will see what happens if not I'll then look for another fuel pump
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post #3 of 4 (permalink) Old 06-18-2014, 04:57 AM Thread Starter
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got the daughter to fit the new one will let you know if it works. !



















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post #4 of 4 (permalink) Old 06-18-2014, 12:45 PM Thread Starter
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ok so its seems to have solved one problem but now i have another :/

it feels like the bike is choking up untill 8k then it takes off, but if i rev the nuts off it then try n scream it seems ok and flies just low down and mid range now has nothing really down on power, i suppose the next step is getting another fuel pump, unless theres any other suggestions, just to recap just a akra slip on and link pipe everything else standard.
but the wot issue has now gone,

http://www.ebay.co.uk/itm/New-Intank...item2a3b8d18ca is this fuel pump any good ? the running pressure seems a tad low.

Thanks in advance guys.
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