... in many ways. Low RPM stumble, low power, excess smoke, hard starting, poor fuel mileage. Check your fuel pressure. It should ... screen under your fuel heater), fuel filter, fuel lines etc.2. Material: Cast Iron,Steel3. Features: 1) Engine Parts-Diesel Overflow Valve ... Moreover, Sample is available: 7 days after confirmation. Diesel Engine Parts 1417413000 High Performance Diesel Fuel Overflow Valve