How much pressure can a fuel line handle?
Working pressure is not relevant, but wire-inserted hose can withstand 50-85 psi, depending on diameter. High-pressure fuel hose for clamp-type fuel-injection systems is also available. This fuel hose is SAE 30R9-rated and uses a fluoro elastomer inner liner that will withstand up to 180 psi and 300 degrees.
What happens when air gets into fuel line?
Air bubbles in a fuel line can lead to stalling, hiccuping or refusal to start. Keep your fuel lines free of air to help keep your car running smoothly.
What is a low pressure fuel line?
Low pressure fuel lines (return lines) return excess fuel from the pump or filter to the fuel tank. Return lines can either be hoses, tubes or hose-tube combinations. Hose materials include Teflon® with a stainless steel overbraid, rubber, silicone and AQP elastomer.
What should the pressure be on the fuel system?
Check the video at the start of this section so that you have an idea how to do a maximum pressure test. If you need to replace the fuel pressure regulator—or whenever you need to disconnect any part of the fuel system—relieve fuel system pressure before beginning to work on the system. Fuel pressure on some models can reach up to 60 psi (414 kPa).
How to test a fuel pressure regulator ( FPR )?
Testing for Maximum Pressure The easiest way to test an FPR is with the use of a fuel pressure gauge. But first, you’ll start your tests with a quick preliminary check: 1. Open the hood and locate the fuel pressure regulator on one end of the fuel rail. This rail holds the fuel injectors in place.
Where can I get a new fuel line?
Lines are available from aftermarket and new car dealer sources. This can be the most expensive and labor intensive option, but this option is the longest lasting repair, returns the vehicle to like-new condition and prevents a customer from coming back with another leak. This is not an option on all vehicles. Option 2: Bend your own lines.
How much fuel can you leak at 30 mph?
The 30 mph and 50 mph tests say that the vehicle shall not leak more than 1 oz. of fuel during impact and shall not exceed 5 ozs. of fuel five minutes after the vehicle has come to rest. FMVSS 301 is the reason why shops should avoid trying to reengineer the fuel line routing and mounting methods.