My newly installed 302 Mangusta engine is doing something weird. It starts and runs well, doesn't overheat, confirmed with the temp gauge and infrared thermometer. The idle will suddenly start to drop until the engine dies. It sometimes will start right back up and at other times will do so only after some down time. While it starts to stumble and die, applying throttle and raising the idle will keep it running. While throttling up at this point the motor sounds good but will stumble if let back to idle. All ignition components have been changed. Carburetor bowls are full of fuel. I've played with timing and carburetor adjustment. Any ideas? Thanks in advance!
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