Question about 2002 Pontiac Grand Am

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How do u know if fuel pump is going bad - 2002 Pontiac Grand Am

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You would have to do a fuel pump pressure check and if its okay the fuel filter could be clogged up

Posted on Mar 21, 2011

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Posted on Jan 02, 2017

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How do you know is the fuel pump is bad


It won't be pumping fuel if it's bad, remove pump and connect to battery you will feel vacume with your finger

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We have a 1995 jeep grand cherokee limited 4 wheel drive. how do you know when the fuel pump is going bad?


you will notice that your vehicle acts like it is starving for fuel, and sometimes , the engine will even die, and then start back up, a lot of fuel pumps can be saved by people not driving their vehicles with a 1/4 or less amount of gas in the tank, because when the the tank gets very low, the fuel pump has to work harder to pump the gas, and even overheats when trying to pump the low amount of gas to the engine therefore resulting in the fuel pump going out.

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1 Answer

How do you know if the fuel injector is bad or the fuel pump is bad? I have a Chevy s-10 2.5 L 4 cyl. Pickup, there is no fuel getting into throttle body, Ican hear the fuel pump working when I turn on the...


Hello there:
To be totally truthfull with you i would first have the fuel filter changed to ensure that the fuel pump can do its job properly than if you want to know if the injectors are working the vehical needs to be running then go to each injector and pull the wire from the injector if the engine starts to shake or make a totaqlly different sound than you know this injector is working HOWEVER if there is no change in the way the engine runs than you have a bad injector or the wiring going to that injector is faulty ok>
I dont think that you pump is bad they rarly will not run at all if they are bad they either work or do not work but you can always take the outlet side hose off and get a large container and to catch the fuel in than have sombody turn the key to the on position and see if you are getting good flow but if it looks weak and barly coming out than yes replace the pump ok?
Hope this is very helpful for you.
Best regards mike

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1 Answer

Bad wiring to fuel pump


don't know how you came to this conclusion but your fuel pump harness has four wires two for the gauge and two for the pump, if you dont know what they are you go over to a auto parts place have them show you one and look at the harness to see which go to the pump now go test the pump on your truck remember when you turn the key you will only recieve power to fuel pump for a few seconds to prime the fuel line after which once it starts the computer cintrols the rest. you might have a bad crank sensor causing it to not start.

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How do i know if my fuel pump is bad on my 1995


Well that could be a indication of a bad fuel pump, but it could also be a bad or clogged fuel filter, or even a really needing a tune up... When was the last time you changed the plugs and wires? I would do that before I ever got into the fuel pump issue... You can have the pump pressure tested. Do the plugs and wires, next do the fuel and air filters... If that doesnt help have the pressure tested...

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Were is the fuel pump in a 04 ram 2500 diesel, and how do you know it is bad? I have a 1/2 tank of fuel and the filter resavoir is empty, and I was driving when it stalled stalled on me.


You may have either or, or maybe even both..The first fuel pump, is in the gas tank...and the second one is a fuel injection pump....You have to see if you have power at your fuel pump//in the tank..if you do, and it does not work then that one is bad, you can also bang on the tank with a Rubber Mallot, while someone is cranking it, and if it starts..you know its going bad also...8bd411c.jpgab5b38b.jpg

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OK WENT YOU OPEN THE IGNITION KEY YOU DONT HEAR NOTHING IF YOU DONT IS GOING TO BE A BAD FUEL RELAY PUMP OR THE PUMP

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