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Author Topic: Fuel Starvation / Power Loss  (Read 1530 times)

Grumpyoldman@40

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Fuel Starvation / Power Loss
« on: October 27, 2017, 06:44:43 AM »

I own a 2009 GT650R. I have recently developed a problem whereby I experience power loss. This is only at the higher rev range and only lasts temporarily resulting in a sudden jolt. The problem is this is generally when Iím overtaking, so itís quite dangerous. Iím currently riding the bike at 75% as I just donít trust it.

Itís had a recent service - new plugs, air / fuel filter etc but Iím just at a loss. Further to this my garage isnít particularly interested in finding the fault stating ďwell, it could be anythingĒ.

Does anybody have any ideas? Iím desperate to get this fixed.

Thanks
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CR

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Re: Fuel Starvation / Power Loss
« Reply #1 on: October 28, 2017, 07:02:45 AM »

If you suspect the fuel pump, remove it and test it submerged in a bucket of fuel. Mine had only a trickle instead of the shot it should of been pumping. Messy but doable and at least you'd know.
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Grumpyoldman@40

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Re: Fuel Starvation / Power Loss
« Reply #2 on: October 29, 2017, 04:48:17 PM »

If you suspect the fuel pump, remove it and test it submerged in a bucket of fuel. Mine had only a trickle instead of the shot it should of been pumping. Messy but doable and at least you'd know.

Thanks for getting back to me. Everything seems to be pointing towards the fuel pump which was my fear. My mechanical ability is quite low, but Iíll give it a shot or just bite the bullet and have it replaced.


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Grumpyoldman@40

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Re: Fuel Starvation / Power Loss
« Reply #3 on: November 23, 2017, 07:45:18 PM »

Turns out it wasnít the fuel pump. It was an air intake leak causing the problems.


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spit051261

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Re: Fuel Starvation / Power Loss
« Reply #4 on: November 24, 2017, 04:26:31 AM »

Seems like your mechanical abilities were a lot better than you thought . Well done  ;)
It's great when people actually try different things and use their brains to find faults .
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2010  GT650R in the best colour RED

Hylife

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Re: Fuel Starvation / Power Loss
« Reply #5 on: November 25, 2017, 06:07:02 AM »


Itís had a recent service - new plugs, air / fuel filter etc ........

Turns out it wasnít the fuel pump. It was an air intake leak causing the problems.

Yet another incompetent dealer mess up.
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nickgtr

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Re: Fuel Starvation / Power Loss
« Reply #6 on: December 12, 2017, 10:05:01 AM »

Turns out it wasnít the fuel pump. It was an air intake leak causing the problems.


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Is there more specifics? as in which part of the intake, or vacuum line? Mines got a similar gremlin but I think its more to do with a very shit batch of fuel I had recently, I serviced it and refuelled it, caned the living shit out of it every gear and didn't have a single hesitation. Cant hurt to check everything just in case though.
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Grumpyoldman@40

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Re: Fuel Starvation / Power Loss
« Reply #7 on: December 14, 2017, 07:42:32 AM »

Turns out it wasnít the fuel pump. It was an air intake leak causing the problems.


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Is there more specifics? as in which part of the intake, or vacuum line? Mines got a similar gremlin but I think its more to do with a very shit batch of fuel I had recently, I serviced it and refuelled it, caned the living shit out of it every gear and didn't have a single hesitation. Cant hurt to check everything just in case though.
I spoke too soon - the same fault is back. Itís not as pronounced as before but as soon as I open that throttle there is a sudden power loss.
I usually use the 98 octane fuel, but just before the problems started I put in the standard 95 - donít know if this has any bearing.
The bike is going to a Hyosung Specialist to get plugged in - Iíll update with what the issues were.



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spit051261

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Re: Fuel Starvation / Power Loss
« Reply #8 on: December 15, 2017, 11:22:44 AM »

I use 91 on my mine and it seems to pop along OK .
Reminds me of when I had my R33 Skyline , that bitch had to have the best fuel although It was fun .
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AJC650

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Re: Fuel Starvation / Power Loss
« Reply #9 on: December 15, 2017, 04:36:17 PM »

Apparently, Hyosungs only need the cheapest fuel - that is what they are tuned for.

If it has just been serviced, it sounds like maybe something from that - plug gap, air leak, loose connection etc.?  Or that pesky sidestand switch?  Mine caused an intermittent cut out until I disconnected it.  That fixed everything!
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