Thread: 07 GP1300 throttle/rpm problem
06-27-2014, 05:31 PM #1
07 GP1300 throttle/rpm problem
A friends 07 GP1300 has some rpm problems,
he just bought it, so there is not much known about the history....
At the trailer there are no problems and it runs/revs fine,
when in the water @load it doesnt reach max rpms.
at half open throttle the rpms jump from 4000 to 6000 and fals back again,
at WOT the rpms also jumps up and down....
with the diagnostic software i didnt find any sensor problems or errors...
tps voltage on the trailer was low0.8 and max3.75v
Compression was 120 in all 3cylinders.
Nothing special about the ski, stock impeller no fuel controller and a Riva S2 stinger.
I think its some timing problem or something like that, but what to test??
06-27-2014, 05:41 PM #2
06-28-2014, 08:55 PM #3
06-28-2014, 09:50 PM #4
or you can install an inline fuel gauge and take it for a ride.
06-28-2014, 09:52 PM #5
Good one, didn't think of that.
What is the output pressure?
Does it vary at idle and WOT?
06-28-2014, 10:02 PM #6
My guess would be reeds.
Because you mentioned a S2 there is a chance it has a mod to the reeds.
-even if OEM I would inspect them closely.
06-29-2014, 08:34 PM #7
fue will be 44 to 46 psi constant. i will imagine if a reed was damage it will show when you did compression test.
06-30-2014, 05:44 PM #8
06-30-2014, 07:20 PM #9
its like when you have bad rear seals , it shows during a comp test.
07-01-2014, 06:39 PM #10
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