I'm running a few week old, properly broke-in HPI RS4 Evo. The engine has been tuned to run properly, however each time I let off of the gas after a short burst the engine dies.

Any ideas what's wrong? I'm a newbie.

-Mike

Make shure that your idle speed is being set by the idle screw on the carb, as opposed to the throttle trim on the radio.
another possibillity is, lean setting on the bottom end.
also, check or replace the glow plug. If it is the one used for break-in it may be fouled.

Maybe you should check the return line or pipe seals

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