I have a Seadoo GTX 260 iS. I installed a racing cam and ensured correct timing with engine and cam locked. Starting and WOT, the Jetski runs perfect. However, at idle it runs at 1000rpm when it should be about 1800. I was told the throttle open % may need to be increased at idle. How do I turn off the default idle % and set it manually thru G4? ...Then ensure its saved during future use?