bayarearot.blogg.se - Symptoms of a bad fuel pump module

#SYMPTOMS OF A BAD FUEL PUMP MODULE HOW TO#
#SYMPTOMS OF A BAD FUEL PUMP MODULE MANUAL#

This is a small metallic cylinder connected to the fuel rail. Disconnect the vacuum line from the fuel pressure regulator (FPR). Check the vacuum line to the fuel pressure regulator (FPR). If necessary, replace the filter to make sure you are not dealing with a restricted or clogged fuel filter.ĥ.

#SYMPTOMS OF A BAD FUEL PUMP MODULE MANUAL#

Have you changed the fuel filter according to your car manufacturer service schedule? Look up the service interval for the fuel filter in your car owner's manual or vehicle repair manual. Consider whether the fuel filter is clogged. If so, have an assistant crank the engine while you observe the belt. After removing the cover or being able to pull the cover a bit, confirm that the belt is in place.

On some models, checking the timing belt is a simple procedure. On average, a timing belt has a service life of about five years. If the engine cranks but doesn't start and the engine uses a timing belt, make sure the belt is still in place or not loose. If necessary, the vehicle repair manual for your particular car make and model will guide you to make this checks.ģ. On some vehicle models, insufficient engine oil pressure will keep the engine from starting to prevent engine damage.If you think there's a problem in the electrical circuit and the fuel pump fuse is okay, try switching the fuel pump relay with another similar relay in your car and try starting the engine.If the car moves, you can go to a local auto parts store that can pull the DTC for you. Check the car computer for any stored diagnostic trouble codes (DTC) in the computer that may point in the direction of the problem.Check the fuel pump fuse, fuel pump relay, and, if necessary, the wiring and other related sensors that the engine control module (ECM-car computer) relies on to activate the fuel pump, like the camshaft position sensor.

If you don't hear this sound but the engine cranks when you try to start it, you may have a problem in the fuel pump electrical circuit.

That means the pump is receiving power and it's responding. That's the sound of the fuel pump being energized.

You should hear a whirring sound coming from inside the fuel tank for about two seconds.

Ask an assistant to turn the ignition key to the ON position, but don't start the engine.

Put your ear close to the fuel filler opening.

If you can't hear the pump working, enlist the help of an assistant and follow the next steps: By turning the ignition key to the ON position (engine off), you should hear the fuel pump come alive with a swishing sound for about 2 seconds. Usually, you can do this test yourself from inside the vehicle. If the engine cranks but refuses to start, make sure that you actually have fuel in the tank.Ģ. This includes some obvious items and often forgotten common maintenance issues that may turn into a false "bad fuel pump" diagnostic.ġ. Doing Your Homework: Preliminary Checksīefore testing the fuel pump, go over this checklist. Testing for Fuel Pressure on a TBI System 1.

#SYMPTOMS OF A BAD FUEL PUMP MODULE HOW TO#

How to Check the FPR With a Vacuum PumpĤ.

Doing Your Homework: Preliminary Checksģ.