Problem	Cause	Solution
Engine does not start.	+ Fuel tank is empty or carburetor is not primed.  + Bad glow plug or dead plug booster battery.  + Fuel lines, air cleaner, or muffler is clogged.  + Engine is flooded due to over-priming.  + Carburetor not adjusted properly.  + Servo linkage not adjusted properly.	+ Fill fuel tank with fuel and prime throttle.  + Replace glow plug and recharge battery.  + Clean or replace clogged part(s).  + Remove glow plug and discharge fuel. Also test grow plug-replace if defective.  + Set idle and main/slow needle adjusting screw to standard starting position.  + Move servo to neutral then re-adjust.
Engine start but then stalls.	+ Fuel tank is empty.  + Fuel lines, air cleaner, or muffler is clogged.  + Carburetor not adjusted properly.  + Engine is overheated.	+ Fill fuel tank with fuel.  + Clean or replace clogged part(s).  + Re-adjust idle and main/slow needle adjusting screw.  + Allow engine to thoroughly cool down and open main  needle adjusting screw 30" turns.
Bad reaction and response  from engine.	+ Carburetor not adjusted properly.  + Low fuel pressure from muffler.	+ Re-adjust main/slow needle adjusting screw.  + Properly install pressure line from muffler to fuel tank.
Car is hard to control.	+ Weak transmitter and/or receiver batteries.  + Low reception from radio antennas.  + Servo linkage not adjusted properly.	+ Recharge or replace batteries.  + Fully extend transmitter and receiver antennas.  + Move servo to neutral then re-adjust.