ok utv runs great AFTER i talked to BRANDON at Joyner USA, was having an issue when operating temps were up to norms, it would like just run out of gas and NOT start again till cooled, so I figured VAPOR LOCKED, well Brandon said yes they has problems with those in those years and earlier, to take to fuel filter that was BEFORE the fuel pump and put in after the fuel pump, and I did so, and the filter was pretty much plugged, so changing it was needed anyhow, that change made the fuel pressure go from 4 psi to 4.5 psi, and I AM NOT SURE what it really calls for on pressures, it was there when I bought it a week ago, but some reason now it runs great, starts great, but when it goes down a huge hill it studders the rpm or may chug itself out if that happens or you stall it, you basically have to wait till its cool again to restart, UNLESS I use starting fluid that kicks it only tried this the last time It stalled and would not start, showing fuels to rails at 4.5 ps.
ANY IDEAS WHY STUDDERS DOWN BIG HILLS OR IF YOU STALL IT WILL NOT START TILL COOL AGAIN?????????????