I fired up my new ZDZ-80 engine in my newly built Lanier Laser 200 today for sytem checkout and range checks. Radio system is brand new also (Futaba 9CAF with R148DF receiver). Range check with engine not running 50 paces ( approx 150 feet), with engine running 10 paces (30 feet)! Arghhhh! Pulled antenna out of fuselage and noted no difference. Receiver and servos are way back from engine. Ignition and battery for ignition are behind firewall. Spark plug cap is on tight. Ignition shields well grounded. What next? Thanks