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| Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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12-06-2011, 08:38 PM
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#1 |
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Getting Wild
Join Date: Jan 2011
Location: PARKER PA
Posts: 105
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G9 shutting off under load
Hi guys got a problem with my g9 ran great all summer untill towards the end here....it seems like it is not getting enough gas when under load... It will run for a while if only give it 1/4 throttle then it shuts down....if i pull choke on it willstart and repeat the same thing....going down hill it runs fine...but as soon as i get on any type of grade oe even flat surface it does it...i have drained gas tank cleaned carb cleaned and made sure air box is sealed tight...took fuel pump apart looks clean in there...i replaced spark plug....i am completly lost here.. Any help would be greatly appreciated.....has 180 psi compression same as has been since i put engine in it... Any suggestions? Thanks
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12-07-2011, 11:06 AM
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#2 |
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Getting Wild
Join Date: Jan 2011
Location: PARKER PA
Posts: 105
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Re: G9 shutting off under load
Any suggestions????
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12-07-2011, 04:32 PM
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#3 |
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Vegas modded 420
 Join Date: Jun 2009
Location: West MI
Posts: 15,445
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Re: G9 shutting off under load
Pull the line off the carb and crank it over, it should spurt out each revolution of the engine just cranking. If not then check all the lines supplying the pulse to the pump they can crack. Clean that little valve on the cylinder make sure you get it back in the right way, in the rubber boot in the line. After that it would be the pump itself or the tank filter, G9 is in the bottom of the tank and pretty large. You can take the cap loose to see if the tank is not vented but that usually takes some run time for the tank to build vacuum with no vent.
The lines cracking are the most common issue here. |
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12-07-2011, 06:57 PM
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#4 |
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Sometime's............
Join Date: Oct 2007
Location: Tacoma Washington
Posts: 11,875
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Re: G9 shutting off under load
The first test-unhook the hose (at the carb) to the airbox and run the car. Is it better? If so air box sealing problem, if not, could be the intake manifold or gaskets are damaged. Just a suggestion.
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12-09-2011, 09:08 AM
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#5 |
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Getting Wild
Join Date: Jan 2011
Location: PARKER PA
Posts: 105
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Re: G9 shutting off under load
I bought a new fuelpump hoping that is the problem.....i unhooked hose from carb and turned it over very little gas came out and not on every revolution...hose are all good i am thinking the inside of the pump is worn out? What valve on the cylender are you talking about to take off and clean? Do you got a pic...gonna put pump on here in a lil while will post what i find..thanks for the help
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12-10-2011, 02:56 PM
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#6 |
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Vegas modded 420
Join Date: Jun 2009
Location: West MI
Posts: 15,445
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Re: G9 shutting off under load
The hose for the pulse goes out the pump to engine, it tees off down to the block and up to that valve.
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12-10-2011, 03:20 PM
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#7 |
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Getting Wild
Join Date: Jan 2011
Location: PARKER PA
Posts: 105
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Re: G9 shutting off under load
well i put the new fuel pump on ....it is running a little better i have checked all the hose and everything.....i am about to give up and take it to the stealership.....i really hate to do that but i can not figure it out and i am getting really frustrated with it... thanks for the suggestions if ne one has any other one please let me know.. thanks
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