A fuel pump every month

[Rakan454ss]

hi everyone,

My 91 C1500 305 is driving me crazy when it comes to the fuel pump , I went through five fuel pumps and each pump doesn't last a month and yesterday it won't start , there's no fuel , I tried different companies like bosch , denso and ac delco.

I changed the sending unit , fuel filter and the gas in the tank always above the quarter.

Any suggestions? Am I missing something?

 

[Justin S]

do the bad pumps still run and just not build pressure, or are they all not working?

 

[Rakan454ss]

The third pump was lean and stalls in high speeds, the last two are working fine but when I start the car next day they don't work

 

[Justin S]

You might have something in your gas tank thats eating away the little plastic gears for the pump

 

[Rakan454ss]

I saw some rust in the bottom of the tank , but the pump has a filter

 

[Justin S]

Yes, it does have a filter for particles, but if there is some sort of a corrosive agent mixed in the gas, it can eat away at the little gears in the pump. When this happens, you can hear the pump run but no fuel comes out.

 

[Justin S]

Might also explain why its leaning out, the fuel might be bad.

 

[Rakan454ss]

The gas i use is 91 , but I'll change the whole gas tank and see how long it will survive.

 

[95Suburban]

Check the wiring, specifically the ground. We had a similar problem with a Tahoe we used to have.

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[kennythewelder]

Check the wiring, specifically the ground. We had a similar problem with a Tahoe we used to have.

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I does sound like a wiring issue, short, bad ground ECT.,maybe even a bad, or shorted relay, IMO