fuel pump replacement

It sounds like the fuel pump is out here are instruction in the diagrams below to show you how to do the job. The pump has a trap door. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

No check engine light comes on. I have cranking power but no spark to turn the engine over.

No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

So you are telling me that the problem is not in the fuel pump? I had a friend use a code reader to determine the destination of the problem and we kept getting a "map sensor" reading? Can you tell me what that means?

No spark has nothing to do with the MAP sensor

To determine if there's a problem with the fuel pump-check the fuel pressure with gauge to rule it out

The manifold absolute pressure (MAP) sensor measures intake vacuum, which the PCM also uses to determine engine load. The MAP sensor's input affects ignition timing primarily, but also fuel delivery.

A mechanic is going to charge me over $600.00....saying that the modular sensor shorted out and needs replaced. Do you think that this diagnosis sounds legitt? I think that he is not being honest with me.

My wife ran into another car at about 10 mph. The auto body shop reported that the fuel pump needed to be replaced as a result. Another mechanic confirmed the need for replacement. Did the accident likely cause the failure? Obviously the car was driven to the scene of the accident.

The accident should have nothing to do with the fuel pump failing. If the pump had really failed, it is coincidence.

Since fuel pumps shut down in collisions for safety reasons, doesn't the possibility exist? For example, I'm told that GMC trucks have a problem with failed fuel pumps in collisions.

No, this make does not have any resetrelay switches. for safety reasons when engine stops, the fuel pump relay would be deactivated by the PCM and when the engine is back running, the fuel pump should work.

However if the fuel pump is not working, it might not be the fault of the fuel pump.
Air bag deployment etc can cause non starting until the PCM has been reset.

i wanted to change a bad fuel pump.i can find the pump but cannot find a strainer, what are the pro's and cons of replacing or not replacing the strainer?

Hi sancho_papito and welcome to 2carpros

It should be attached to the bottom of the fuel pump -you can visually inspect it for debris if its clogged-up

Good Luck

Electrical problem
2004 Hyundai Sonata 4 cyl Manual 94,000 miles

Hi i have a hyundai sonata,and it shut down on me while i was driving.I change the fuel pump cuz it seemed like that it was but the car wants to turn on but it wont.I wonder if its something electrical,relay of the fuel pump,or if it is hose of the gas that is clogged.

Cranks but no start condition:

Fuel and Spark:

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 3/16 away from ground -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it.

does this car have an access panel to replace fuel pump? What is the location of the fuel filter?

lift up the back seat and the plate is there. be carefull. fuel will spill out

Roy

thanks. Thought I might have to drop tank. Filter on frame rail I assume.

yes thats correct

roy

We needed to replace the fuel pump however it needed to be done that day and no one had a new fuel pump assembly that we could get right away. We got a fuel pump from a 2003 Kia Optima 2.4 liter the only difference is the old fuel pump for the Hyundai has a connector for a fuel temperature sensor that is mounted on the fuel pump assembly. The new fuel pump does not have the sensor/wires so there is nothing to connect into the connector. So this is causing a check engine light and an error code for fuel temperature sensor circuit low input. Is there a way that we can bypass it or just jump the connector or is there a way to relocate the sensor and wires from the previous fuel pump to the replacement fuel pump so that it can be connected and the check engine light will then go off? Any help will be appreciated as soon as possible thank you.

There is no way to by pass it because it does a specific reading. You must install the correct fuel pump.

What exactly does it do? Because the one I put in is from an optima and it's working fine

see pic for explanation but without it the evap system is going to think it's got a leak so will set a code for. it measure pressure inside tank

Engine Performance problem
2003 Hyundai Sonata 4 cyl Front Wheel Drive Automatic

is the an an opening under the passanger seat like hondas or do i have to drop the tank?

2003 Hyundai Sonata Removing Fuel Pump. What's wrong with it??

1. Open trunk and remove fuel pump access cover. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Disconnect negative battery cable. 2. Remove fuel tank filler cap to release fuel tank pressure. Disconnect fuel pump and sender harness connector. Disconnect high-pressure and fuel return lines at fuel tank. Cover high- pressure hose connection with shop towels to prevent fuel leakage. Remove fuel gauge sending unit retaining screws and remove fuel tank sending unit assembly from tank. Remove fuel pump from sending unit assembly. Installation (Sonata, Tiburon & XG350) Install fuel pump to gauge sending unit assembly. Install fuel pump and gauge sending unit assembly into fuel tank, using care not to pinch "O" ring. Reinstall retaining screws. Connect pressure and fuel return lines to fuel pump and carefully tighten fittings to specification. See TORQUE SPECIFICATIONS . Ensure fuel lines do not twist or bend. Energize fuel pump and check for fuel leaks. To complete installation, reverse removal procedure. Page 1 of 1 3/27/2010 ...The specs are ft. lbs:

I have a 04 hyundai sonata
Today it just died driving down the road. I could not hear the fuel pump working. So i had towed home pulled pump and tried jumping it out of car. I worked fine. I then thought could be the relay but It "clicks" and have power to pump. What else can this be. The pump will not run in car but will on bench?

Did you test the power supply to the fuel pump?
Fuel pump would only prime and stop when ignition is turned on. You need to crank the engine to get it running.

A failing fuel pump might work after being removed and reinstalled but it would fail again later on.

My car was not starting and I thought it was because my timing was off so I replaced the timing belt and fuel pump also and now it still won't start and stay on. There is no power to the back and I'm trying to find the fuel pump relay if it even carries one. I need help on what to test out?

check fuel pressure with a gauge auto parts rent it and scan for codes. check fuses in under hood fuse box pic points out engine control relay which is for fuel pump and ecm. it 's under dash

forgot the pic sorry

OK the fuses are good under hood and car was resreset so has no codes stored in vehicles modules. Tested power with a light tester on fuel pump and no power going good back there nor is there fuel going to the engine when I start and crank the car. So memeet step I believe is the relay which is the same as ecm correct?

yes the gray wire leads to the pump.

How much doe it cost to replace fuel pump on 2003 hyundai sonata

Pump is listed at $188.24 alone and $332.88 if complete assy with sending unit and filter.

Book time for replacement is 0.8 hour.

Prices ranges at different location so you need to get local quotes to be accurate.