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12-07-2004, 11:50 PM | #1 |
Senior Member
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fuel pressure regulator
how do i test my fuel pressure regulator? how will I know whether its time for a new one or not? cheers...
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13-07-2004, 12:08 AM | #2 |
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does the 91 astina pressurise the fuel system when ignition is on "ON", not start(cranking)? thanks.
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13-07-2004, 04:01 AM | #3 |
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Join Date: Feb 2003
Location: Edinburgh, Scotland
Car: A Mazda 323F BJ Sport.
Posts: 1,064
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you need a pressure gauge in order to check the regulator.
there`s a variety of test you can do on the reggy and fuel pump. and i think the bg pressurises the system with the ignition on but cuts out after 2 or 3 seconds unless you start the car :wink: |
13-07-2004, 10:38 AM | #4 |
AstinaGT Regular
Join Date: Mar 2003
Location: Sydney, Australia
Car: Evo 8
Posts: 301
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it will pressurise the system when on and will pump will the pressure is high enough...
easy to test... buy a pressure gauge, some hose and fittings (see below) if you have an aftermarket reg (malcrappy, sx racing, sard) hook it up to the 3 outlet on the reg to read pressure otherwise use a T connectors to hook it up between the fuel pressure reg and the fuel return line hope this helps... good luck
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13-07-2004, 11:44 AM | #5 |
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You can hear the fuel pump relay click when your turn the ignition to "ON".
I can hear my pump prime the system when I start mine RElay should be in the main engine bay fuse box IIRC
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JynX 1994 Turbo BA Astina 200whp @ 12psi "If you cant drive fast with 90hp..... 900hp wont help you" |
13-07-2004, 12:26 PM | #6 | |
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Join Date: Mar 2002
Location: Melb, Aus
Car: Mazda 323 BA BPT transplant
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Quote:
I've fried 2 so far. cant work out why its happening. Havnt had time for a proper look around tho. |
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13-07-2004, 01:21 PM | #7 |
Senior Member
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Bad ground? Obviously short circuiting somewhere. Any other fuses/relays go
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JynX 1994 Turbo BA Astina 200whp @ 12psi "If you cant drive fast with 90hp..... 900hp wont help you" |
13-07-2004, 06:54 PM | #8 |
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i thought Bg only pressurised the system when cranking. I can hear a click when i turn the ignition on, but thats the injector relay inthe engine bay. the fuel pump relay is situated next to the computer behind the radio. im not sure whether its a relay or just a switch, it seems to energise the fuel pump only when I crank.is that correct, or is the circuit not working properly? thanks
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14-07-2004, 05:43 AM | #9 |
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Join Date: Feb 2003
Location: Edinburgh, Scotland
Car: A Mazda 323F BJ Sport.
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if you de-pressurise the system (for maintenance or repairs for example) then turn the ignition on without starting you should hear the pump working until it pressurises the system again.
the reason you only hear a click is coz it`s already pressurised. |
14-07-2004, 06:24 PM | #10 |
Senior Member
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hey Geetee,
i can never hear the fuel pump working with ignition on. Ive been have a bit of starting problem when my car is cold and i noticed there was no fuel pressure in fuel rail when it has been parked for 4-5 hours!! where is that relay which runs the fuel pump? I had my gf to turn the ingition on and i had my ear next to the fuel lid and couldnt hear it running with ignition on in the morning... |
15-07-2004, 04:11 AM | #11 |
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Join Date: Feb 2003
Location: Edinburgh, Scotland
Car: A Mazda 323F BJ Sport.
Posts: 1,064
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noy sure where the relay is but try the passenger side footwell, at the bottom of the "a" pillar. take the plastic trim off and it might be behind there.
i defo remember hearing the pump for about 2 seconds the last time i changed my fuel filter. apparently it switches on with the ignition and cuts out if the car isn`t cranked after 2 or 3 secs. |
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