Hit tank with rubber hammer and it will start?

Tiny
BUDDYGUY
  • MEMBER
  • 1998 CHEVROLET S-10
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 230,000 MILES
Replaced fuel pump 2000 miles ago I can hit tank with rubber hammer and it will start and run but will stall sometimes and die it with hammer and runs?
Thursday, July 15th, 2010 AT 10:30 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

It sounds like you could have a faulty fuel pump.
The pump could also have a loose connection, that's why you are able to hit the tank and get it to work.
Check the wiring that goes to the pump, make sure you do not have a loose or corroded wire. Also check for any break in the wire insulation as that could crate a short and not trigger the pump when it supposed to.

https://www.2carpros.com/articles/how-a-fuel-pump-works
https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

I have attached diagrams for your reference.

Please let me know of any questions.

Thank you.
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Monday, August 16th, 2021 AT 12:33 PM

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