Fuel Systems and Troubleshooting

Question 1

In rigid tubing, how many bends must there be and why?

Answer 1

One bend for slight misalignment, vibration, expansion and contraction

Question 2

Where is the only place you see stainless steel tubing?

Answer 2

Wheel wells

Question 3

What are the three types of Fuel filters?

Answer 3

Metal screen, paper, brass particle

Question 4

What does prist do?

Answer 4

Lowers freezing point of water and removes bacteria

Question 5

How does the LOW FUEL PRESS warning work?

Answer 5

• Pressure switch is set to open or close at a set boost pump duel press.
  
  • When the boost pump fails, press. switch closes to ground and LOW FUEL PRESS caution light illuminates

Question 6

How does the fuel filter bypass work?

Answer 6

Differential Pressure Switch (DPI) senses before P₁ and after P₂ filter press.

Switch closes to ground and illuminates filter bypass caution light

Question 7

How does the FUEL LOW QTY light operate?

Answer 7

Float type or other mechanically operated switch closes to ground when fuel volume gets below a preset limit and illuminates the FUEL LOW light