To anyone having problem with heir fuel pump what not, On a previous and old thread, we were told to clean the fuel pump resistor pad with a Q-tip to clean it and put it back and in some cases it would fix the problem but now I found out that the best thing to clean those resistor pad is an old pencil lol


Hope that helps


here are some pic of the before

 

hmm didn't realize that the fuel level sender sweep pad needed to be cleaned. are you cleaning the resistor contacts due to the cluster gauge being erractic?

 

Yes The first time it happen my car died on the high way and the gauge cluster was on half a tank and it happen a lot of time.

When I brought the car to the dealer they told me to change both fuel pump and sending unit.

so I bought a new sending unit and now the car dies at 1/4 of a tank every time so Ive decided to clean it and replace with the one on the used fuel pump to test

 

thanks for the additional info. gonna have to look into this on a electrical diagram and see why the fuel sending unit would affect fuel pump operation since most sending units are on a separate circuit from the pump itself even though its mounted with the pump.

 

I did some test on both fuel pump, the original on my car and the one I bought on ebay and both were doing the same thing, both showed empty at 1/4 and full of gas at 3/4 of a tank. So I think it may be the gas gauge the problem, so now when I brought my car to have it diagnostic its either those guys didn't do a good job as I think.

 

I'm curious: What was the condition of the inside of your fuel tank and the fuel in it? Any water or debris of any kind inside of your tank? Anything at all besides pure gasoline?

 

Use OBD Fusion (or maybe Torque) to find out the reported fuel level. This will tell you if the dash gauge is inaccurate or the sender.

I suspect the sender as the dash gauge is driven by a stepper motor and a reduction gear set. If it moves at all, it is working properly.

 

This is what we did, we connected both pump to the car and we made sure the pump was standing straight and we lift the arm to see where the gauge on the dash was reading at and it was reading full at 3/4 of a tank, so we put the arm back down and it was reading empty at 1/4 on the dash.


Pure premium gas is inside the tank

 

I use Dash command and torque when I did the Diagnostic it said P0462 Fuel level sensor A circuit low but I will see how to tell about the dash gauge inaccuracy I'm not an expert in those app.

 

I downloaded OBD Fusion today and will try and test it but I took some pictures of Dash Command while driving yesterday at 12:51pm and the other posted at 5:20 pm - 09:20 pm 11:10pm and 11:13 pm.


Hope one of you can decipher all of tks for some of us lol

 

is the part you bought from ebay new? or used or perhaps remanufactured? so to get this straight you compared the old part versus the one purchased and performed float sweep on both units. they are showing "empty" at the 1/4 level and "full" at 3/4 level? i would think there is an issue with the resistance on the sender side on the part you just bought off ebay since its showing the same result as your old part.

 

When the dealer ship diagnose the car they said on the paper that the sending unit was not working properly but the girl told me to change both, so I bought 2 used one ( fuel pump and sending unit) when I install them I thought everything was good but a week later the car died on the high way and it happened 3-4 time but at this point the car would ru out of gas at 1/2 a tank but the needle on the gas gauge barely went below that.


I thought it was the sending unit but the ebay seller guarantied that they all work and tested, so I bought a new OEM sending unit and installed it by this time the car died at 1/4 of a tank every time so my friend and I decided to do a bunch of test and that's when with both fuel pump and and we both switch resistor pad and it would show full at 3/4 and empty at 1/4.


I will contact the seller and notify him of this, you may be right tks I never thought about that lol.

 

I used the OBD Fusion and here what the pictures shows

 

may i ask if you replaced both the left and right side pump and sender assembly or was it just on the right side? the units need to be replaced together. and not just the unit on one side, at least that is from my own experience working on fuel pumps on vehicles with split tanks. usually in split tank fuel tanks i would also check the siphon hose that goes from one side to the other side to make sure its not kinked or crushed. in addition check the pins on the wiring connectors going into both lt and rt side units for corrosion.

 

I replace both side left and right side, I sprayed the pin with some Electronic cleaner there was no sign of corrosion.
so today I took a picture of the gas gauge at work during my lunch time at 11:30 and the millage was 179454 and the second one is 179460 and the gas gauge went up significantly and the last pic is when I added $10 of gs at the pump. Something is definitely not working properly after I changed the pumps and sending unit.


I have spoken to the mechanic at the garage and he told me that his wife car is having the same problem and they dont know what to do. I should be smelling a free class action law suit coming soon lol



I have an appointment at the dealer again next month for more testing