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-   -   '04 FSE 450 Cuts Out When Throtte Applied - PLEASE HELP MEl (http://www.gasgasrider.org/forum/showthread.php?t=4672)

adpartain 05-21-2009 02:19 PM

'04 FSE 450 Cuts Out When Throtte Applied - PLEASE HELP MEl
I have an '04 FSE 450 with about 2000 miles on it and here is the current problem:

I can get it started after some difficulty. If i attempt to accelerate or give it any throttle it will bog and cut out as if it is not getting enough gas. It seems to idle fine when it is running. It will only run for a few minutes before it dies or until I try to throttle up. I suspect fuel pump? Relay? Injector? I have no idea. Fuel pump primes when I turn the key. No blown fuses. It is in the shop right now but as of this moment they have not found the problem.

If anybody has this problem, suggestions, or even a solution PLEASE let me know. I need to troubleshoot and figure out what is going on with my bike ASAP as for I have a scheduled ride coming up that I cannot miss.


jjbaker1 05-21-2009 02:22 PM

swap the fuel pump and fan relay around, behind the left hand side panel, and see if it makes a difference,

adpartain 05-21-2009 02:25 PM

What exactly does swapping the fan and the fuel pump relay do? That is just a troubleshoot correct? Not a permanant fix. Its just check to make sure the fuel pump is working correctly using the fan relay?

mcludd 05-21-2009 02:30 PM

I would presume it is to prove that the fuel pump relay is/is not working correctly

jjbaker1 05-21-2009 02:44 PM

hi, thats right, i had issues with mine, you would ride along then open the throttle and it seemed that the bike just wanted to die, i swapped over the relays after cleaning them, and that sorted it, two new relays, siliconed in, not had issue since. just swap them to trouble shoot.

jjbaker1 05-21-2009 02:48 PM

the other thing to check is the connection between fuel tank and wiring loom, this seems to be a week spot, and my mates 400 rang like a bag of spanners when connection is bas, infact that has happened a couple of times this year already, the connections in that part are poor and small.

jenkitchen1006 05-21-2009 03:48 PM

iv just bought a gas gas ec 450 fse on 03 plate .the thing wasnt running right when i bought it .it is exactlly the same as you ,i had a muck about with it .took the throttle position sensor off, and i had mid ,but no bottom or top ,i put the bike in to bike tech,said i dont mind spending 4/5 hundrerd to fix it ,as i got the bike at a good price,that was last satuday ,phoned dave yesterday he said it was a matter of elimination,he said its 2 hunderd for an injector but it might not be that .i can do that myself ,swap new bits till it goes, i was down there first thing and got my bike out off there ,how the f--- this guy is a gas gas dealer,GOD KNOWS,so my advice is dont take it to BIKE TECH ,anyway back to your prob ,i have now got the bike with a mates mate this guy is a specialist in race bikes ,a right clever cunt,so do me a big favour stay intouch with this one and vicer verser ,the min i know what it is youll be the first to know , if you find out first please let me know,dave ,

nick790 05-22-2009 03:22 PM

You really know how to fly the flag:mad:

Please dont think this is a typical Brit;)

jenkitchen1006 05-22-2009 04:14 PM

i take it you owe dave gasass money

gasmonkey 05-22-2009 07:19 PM

Back to issue in first post,,,If you suspect faulty relays,replace them.I've generaly found them reliable.Whats not reliable concerning them is the wiring connections in the connector block.The bike vibes loosens them, they then corrode and give interminant perfomance.Even the wiring itself corrodes.It's an utter crap setup for an off road bike.Pare back all affected wiring and replace using solder and heat shrink.Finally solder new wires directly to relays.--problem solved.
Also btw use only FRESH high octane fuel.
Hope this helps

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