What happens when a fuel injection pressure regulator goes bad?
What happens when a fuel injection pressure regulator goes bad?
The most obvious symptom of a bad fuel pressure regulator is an engine misfire and loss of acceleration power. You will be driving and then suddenly your vehicle will lose power, stumble, and/or slow down. Then it may go back to accelerating normally for a short time before losing acceleration power again.
Can I bypass the fuel pressure regulator?
To bypass the FPR I would recommend upgrading the FPR as well. But just grab a vacuum source from the plenum and use a dedicated line. I’ve had issues with knock with sharing a line for my BOV. Some people have not had such issues but just something to look for if you do encounter knock.
Would a bad fuel pressure regulator cause no start?
More than just the engine misfire, the engine will also most probably not start when the fuel pressure regulator is bad. Regardless of how many times you start the engine, it won’t turn on. However, when the problem with the regulator is extreme, regardless of how many times you try, it won’t start at all.
Can a fuel pressure regulator cause a no start?
What should fuel pressure be at idle?
When an engine is idling, there is a vacuum in the intake manifold. With a return system, the base pressure is set with the engine off, but the pump running. For a GM, this pressure is usually set to 58psi (factory fuel pressure in the rail).
What is the correct fuel pressure?
Because, the average fuel pressure, can be anywhere from 45 psi to 55 psi. To be sure, consult with your vehicle owner’s manual; for the proper fuel-pressure range, before performing this test.
How do I check my fuel pressure without a gauge?
Disconnect the hose coming from the pump to the filter and block the passage of the hose tightly with your finger. You can then start the car. If you feel that the fuel is pushing your finger hard, it means you have good pressure.
How do you check a pressure regulator?
Check the reading on the air regulator gauge and the tank gauge. If they match, hook up an air tool to the quick-release coupler on the end of the air supply hose. Pull the trigger to turn the tool on. If the tool works, you have set the adjustment correctly and unblocked the regulator.
