... to run poorly in many ways. Low RPM stumble, low power, excess smoke, hard starting, poor fuel mileage. Check your ... Be sure to check for other fuel flow restrictions, such as plugged primary filter (screen under your fuel heater), fuel filter, ... for testing the Quality, Moreover, Sample is available: 7 days after confirmation. Diesel Engine Spare Parts Fuel System Parts 1417413060 Fuel Control Valve ...