The only way to truly tell is to place a fuel pressure gauge on both sides of the line and get a reading from both. If your car isn’t starting at all, and you hear the fuel pump prime that is usually a good indication that the pump is working to some capacity.
Full Answer
How to replace the fuel pump on a Volkswagen GTI MkIV?
Replacing the fuel pump on a Volkswagen GTI MkIV can be done without removing the fuel tank. There is an access panel under the rear seat cushion that allows servicing. To access the pump you will need to first remove the rear seat. Please see our article on removing your seats.
What happens when the fuel pump on a Volkswagen Golf goes bad?
If your Volkswagen Golf’s fuel pump goes bad, no fuel (or not enough fuel depending on whether or not it’s out all the way) can enter the engine. Without gas your Golf will not run at all.
How do I know if my fuel pump is bad?
Sometimes when there is low fuel pressure, you may also get an oxygen sensor related trouble code as well. The real issue with diagnosing a bad fuel pump is that it resembles many other vehicular issues in terms of symptoms. Also, the symptoms are almost exactly the same as bad/clogged fuel filter.
Why is the fuel pump in the fuel tank?
It is in the fuel tank because “pushing” fuel to the fuel rail is easier than “pulling” the fuel, which is what an inline pump would do. While being in the fuel tank makes the pump more reliable, it also makes it a lot more difficult to get to. The good news is that fuel pumps are inexpensive.
How do you check the fuel pump on a VW mk4?
0:162:13Testing if Fuel Pump is Bad Volkswagen Passat (1998 thru 2005)YouTubeStart of suggested clipEnd of suggested clipBut basically what we want to test is we want to test resistance. On the outer pins which is pin 1MoreBut basically what we want to test is we want to test resistance. On the outer pins which is pin 1 and pin 4. And so I have my meaty arrow here I got it set on 200 ohms. And.
How can I test my fuel pump?
3:536:05How to Properly Test and Diagnose a Bad Fuel Pump - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo you get your black test lead put it on the pen for the ground. And you can use the red test leadMoreSo you get your black test lead put it on the pen for the ground. And you can use the red test lead on the pen. That you verify that you have power to see if you get a reading.
How do you test a VW fuel pump relay?
1:295:59Fuel Pump Relay TESTING and REPLACEMENT - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd I'll show you on how you can quickly test to see if the relay is working or not I just want toMoreAnd I'll show you on how you can quickly test to see if the relay is working or not I just want to move this up with your index finger. And then pull back and that's it use your harness.
How do I know if my fuel pump has power?
0:412:56Fuel Pump Electrical Check - Wrenchin' Up Back To BasicsYouTubeStart of suggested clipEnd of suggested clipNegative terminal in other words connect your voltmeter between the ground points that you'reMoreNegative terminal in other words connect your voltmeter between the ground points that you're checking. And the battery negative terminal.
How can I tell if my fuel pump is bad?
Symptoms of a bad fuel pumpEngine runs poorly. If you've owned your vehicle for several years or have experience behind the wheel in general, you probably know what a well-running engine sounds like. ... Vehicle doesn't start. ... Overheating engine. ... Can't sustain speed. ... Decreased fuel efficiency.
How do you troubleshoot a fuel pump?
4:255:32How To Diagnose A Fuel Pump Failure - EricTheCarGuy - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd see if we're getting a signal or voltage to the fuel pump itself right and if it is then we canMoreAnd see if we're getting a signal or voltage to the fuel pump itself right and if it is then we can reasonably assume that the fuel pump needs to be replaced right Thank You Shane healty.
How do I know if my fuel pump relay is working?
Grab the relay firmly on either side and pull it straight up and out from the terminals of the fuse box. If the relay doesn't pull out right away, try rocking it back and forth to loosen the connection. You won't be able to start your engine after you remove the relay because the fuel pump won't work.
Can you hear the fuel pump run when the key is turned on?
4. Once the car is on, you need to listen for the fuel pump. Someone else needs to turn the key because the fuel pump will hum for just two or three seconds if it's working. If you do not hear anything, the pump is not working.
How do you check a fuel pump without a pressure gauge?
The simplest way is to just listen for the hum of the fuel pump when you first turn your car on. You can also use an OBD II scanner. Testing your fuel pressure without a gauge is always going to be a bit imprecise and you should get a gauge as soon as it's convenient.
How do I get my fuel pump to work again?
1:164:17How to Fix Your Car (Briefly) with a HAMMER!!! - YouTubeYouTubeStart of suggested clipEnd of suggested clipBut here's a really quick way to tell if you've got a bad fuel pump take your hammer and strike theMoreBut here's a really quick way to tell if you've got a bad fuel pump take your hammer and strike the fuel tank in the middle. Then try to start the vehicle. Again.
Can a fuel pump just stop working?
A Real World Example Fuel Pump Failure Fuel pump performance problems can occur intermittently. But trouble can be followed by periods of perfect serendipity. It's just life.
How do you start a car with a bad fuel pump relay?
2:453:40THIS REALLY WORKS!!!!!!! Bad fuel pump, fuel pump relay, no fuel ...YouTubeStart of suggested clipEnd of suggested clipBut here you can see we just spray a little bit in the intake when the engines not getting fuel fromMoreBut here you can see we just spray a little bit in the intake when the engines not getting fuel from the tank.
Why is it important to replace a fuel pump?
It is best to replace your fuel pump with the fuel tank drained. This reduces the amount of possible spilled fuel and fuel vapors.
Can you replace the fuel pump on a GTI?
Replacing the fuel pump on a Volkswagen GTI MkIV can be done without removing the fuel tank. There is an access panel under the rear seat cushion that allows servicing. To access the pump you will need to first remove the rear seat. Please see our article on removing your seats. A faulty fuel pump can cause poor engine performance ...
