... , low power, excess smoke, hard starting, poor fuel mileage. Check your fuel pressure. It should be around 20psi at idle and ... restrictions, such as plugged primary filter (screen under your fuel heater), fuel filter, fuel lines etc.2. Material: Cast Iron,Steel3. Features ... Engine Spare Parts 3) Tractor Diesel Pressure Valve 4) Tractor Fuel Control Valve 4. Certificate: ISO9001:2000, TS169495. Warranty: ...