What does a fuel pressure regulator do on a throttle body?
A fuel pressure regulator maintains fuel line pressure and sends excess fuel back to the tank. The mixture control unit regulates the amount of fuel that is sent to the injectors based on the amount of air flow through the intake and the engine temperature.
Why am I not getting gas to my throttle body?
You would first need to check fuel pressure to make sure it is high enough, and replace the fuel pump if it is not. Then once the proper fuel pressure is achieved, clean the injection system. This may fix the hard start and if not, then the fuel injection spider would need replaced.
What causes a throttle body to flood?
This is most likely a throttle body component failure, a fuel line leak or a fuel injector that is always active. It might be a good idea to have a professional mobile mechanic complete a fuel system inspection to determine what is causing this problem.
What are the symptoms of a failing fuel injector?
Here are a few signs there might be something wrong with your fuel injectors.
- The Engine Misfires. Dirty fuel injectors may cause your vehicle’s engine to misfire.
- Idling Gets Rough.
- Your Gas Mileage Tanks.
- The RPM Needle Starts to Dance.
- Your Car Won’t Start.
How do I know if my fuel pump or relay is bad?
How to tell if fuel pump relay is bad (6 Signs)
- Check Engine Light (CEL) Illuminated.
- High Mileage.
- Long Starting Time.
- Engine Performance Issues – Stalling, Idling, Acceleration, Not Starting.
- Car dies while driving.
- Silent Fuel Pump Noise.
- Park the car in safe and level ground.
Can a bad fuel pump start a GM Spider?
If you need to test the ‘spider’ equipped GM pickups or SUVs, the following tutorial will help: Troubleshooting The Fuel Pump (GM 4.3L, 5.0L, 5.7L). A bad fuel pump will make your 4.3L, 5.0L, or 5.7L throttle body fuel injected pickup or SUV crank but not start. Here are some more specific symptoms:
Where is the throttle body fuel pump located?
As you’re already aware, the throttle body fuel injection system on your 1987 to 1995 4.3L, 5.0L, or 5.7L pickup (or SUV) uses a low pressure (12 PSI) electric fuel pump located in the gas tank.
What happens if you have a bad fuel pump?
A bad fuel pump will make your 4.3L, 5.0L, or 5.7L throttle body fuel injected pickup or SUV crank but not start. Here are some more specific symptoms: The ignition system is creating and delivering spark to the spark plugs.