Fuel pump location and replacement?

Tiny
KMIKETRADING
  • MEMBER
  • 2000 MAZDA 323
  • 120,000 MILES
I have changed the fuel pump and injector rail but the car but the car still loses power I have notice when I disconnect the fuel return line to the thank the car gets its full power and when I connect the line again it loses power again? Is the pump bad?
Thursday, September 5th, 2013 AT 6:20 AM

14 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Check the fuel pressure regulator this guide will help walk you through the correct way to change the pump out with instructions in the diagram below to help you with your car.

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

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Thursday, September 5th, 2013 AT 6:47 AM
Tiny
KMIKETRADING
  • MEMBER
  • 8 POSTS
CAN YOU PLEASE TELL WHERE IS THIS FUEL PRESSURE REGULATOR
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Thursday, September 5th, 2013 AT 6:51 AM
Tiny
KHLOW2008
  • MECHANIC
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It is the part that the return hose is attached to.
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Thursday, September 5th, 2013 AT 6:55 AM
Tiny
KMIKETRADING
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  • 8 POSTS
OK THAT REGULATOR WAS CHANGED WITH THE INJECTOR RACK AND SAME PROBLEM
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Thursday, September 5th, 2013 AT 6:59 AM
Tiny
KMIKETRADING
  • MEMBER
  • 8 POSTS
IS IT POSSIBLE THE RETURN LINE CAN BE CLOSING IN WHEN ACCELARATING
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Thursday, September 5th, 2013 AT 7:01 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
When return hose was disconnected and ignition turned on, does fuel shoot out momentarily?
Did you test the fuel pressure?
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Thursday, September 5th, 2013 AT 12:09 PM
Tiny
KMIKETRADING
  • MEMBER
  • 8 POSTS
Good continuous fuel pressure of about 65 psi
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Thursday, September 5th, 2013 AT 1:22 PM
Tiny
KHLOW2008
  • MECHANIC
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Is the vacuum for the pressure regulator working correctly?
Is the Malfunction Indicator Light showing and have you checked for trouble codes?
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Thursday, September 5th, 2013 AT 1:36 PM
Tiny
ENISEJ
  • MEMBER
  • 2 POSTS
  • 1990 MAZDA 323
Engine Mechanical problem
1990 Mazda 323 Two Wheel Drive Manual 184000 miles

I own Mazda 323f, and I have one problem that I cant figure out.
My Mazda was of road for about one month, reason is that my fuel pump drop dead on the road and now after one month I replaced the fuel pump and Its working fine but I cant start the engine.
Before the problem with the pump engine was excellent it was starting like crazy but now cant.
Engine starts but at 100rpm and after 2 seconds it turns of and I cant find the problem, cables are fine, fuel pump is fine, air system is fine but engine cant start properly can u help me please I don't know what to do
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Friday, September 11th, 2020 AT 12:45 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure could be the fuel filter and bad new fuel pump or the injectors are not pulsing
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Friday, September 11th, 2020 AT 12:45 PM (Merged)
Tiny
ENISEJ
  • MEMBER
  • 2 POSTS
How to chek are the injectors pulsing? Can the plug sparks be too dirty to start engine?
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Friday, September 11th, 2020 AT 12:45 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Did you check the fuel filter could be clogged-up, checking the injector/s listen to it if its clicking
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Friday, September 11th, 2020 AT 12:45 PM (Merged)
Tiny
USER
  • MEMBER
  • 1 POST
  • 1988 MAZDA 323
  • 4 CYL
  • FWD
  • AUTOMATIC
Where is the fuel pump located on a 88 mazda 323 non-turbo? Also, how do you replace one?
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Friday, September 11th, 2020 AT 12:45 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Transfer pump

TURBO WITH ALL WHEEL DRIVE
1. Remove filler cap.
2. Remove transfer pump bracket from under vehicle.
3. Disconnect fuel hoses and the transfer pump electrical connector.
4. Remove transfer pump.
5. Reverse procedure to install.

FUEL PUMP
1. Remove rear seat cushion.
2. Disconnect fuel pump connector and remove cover.
3. Disconnect fuel main and return hoses, plugging them to prevent leakage.
4. Remove fuel pump and fuel tank gauge unit assembly.
5. Replace fuel pump.
6. Reverse procedure to install.
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Friday, September 11th, 2020 AT 12:45 PM (Merged)

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