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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / November 2005

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fuel pump

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jdl - 26 Nov 2005 12:43 GMT
If the filter and strainer on an electric fuel pump were totally clogged,
wouldn't the pump still make a noise, on the initial prime, couldn't you
still hear it, even though it wasn't pumping gas?

On some electric motors, I can hold the output shaft and it won't turn,
but I can still hear the motor humm.

If both the filter and strainer were clogged, wouldn't it blow the pump
fuse? thanks
Ralf Ballis - 26 Nov 2005 18:01 GMT
> If the filter and strainer on an electric fuel pump were totally clogged,
> wouldn't the pump still make a noise, on the initial prime, couldn't you
> still hear it, even though it wasn't pumping gas?

Would say yeas it makes a sound on initiation.

> On some electric motors, I can hold the output shaft and it won't turn,
> but I can still hear the motor humm.
>
> If both the filter and strainer were clogged, wouldn't it blow the pump
> fuse? thanks

Depending the problem, mainly not. Blocking an electric motor current
becomes increase.
You can check succes of fuel presure, or in doubt clean or replace filter.

Regards,

Ralf

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jdl - 29 Nov 2005 18:46 GMT
Thanks for the reply, I should have posted back sooner, but the wind has
been bad here lately, can,t stay on the internet more than 2 or 3 seconds,
the wind works the phone line like a jump-rope.

I had a pump fail on me a few weeks ago, no warning, nothing. The vehicle
ran fine, parked about 15 minutes, wouldn't restart. Good spark no fuel
pressure. Couldn't here the pump run. The scanner showed voltage going to
the pump.

I replaced the pump, filter, strainer, it started-up fine, no problem
since. After I got the old pump out, I tested it with jumper-wires, had
the pump laying on top of the battery, not the best place, but the jumpers
were short, gas went everywhere, I wouldn,t have thought that little pump
would hold that much gas. Then I wondered if the pump was the problem? I
still think it was, the old fuel filter was still good but I replaced it
anyway. Tore the strainer off getting the old pump out of the bracket. I
don't think the strainer was the main problem, I,m not going to drop a
tank just to replace the strainer. The old pump had about 200k on it. It's
my understanding the manufacturers won't warranty the new pump unless the
strainer is replaced. I guess I could have checked the amp-draw before I
took anything apart, didn't think about it? thanks
 
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