Hello all,

When I take off with my HPI RS4 Evo, sometimes it will begin revving (get to about 1/3-1/2 revs) then suddenly cut out for a split second, nearly stalling, before revving back up. This was happening a bit at the track yesterday and I couldnt quite figure out what I was tuning wrong.

Anyone know what about my tune is off? My guess is LSN too rich - clarification anyone? Thanks heaps.

too lean i guess

Perhaps a servo problem.

Sounds like it is sucking up an air-bubble....check lines for cuts or holes....also check carb is tight.

If it is too lean, it sounds temporary, so check pressure line, fuel tank and fuel tank lid as well.