I have a 2002 Mazda millenium that I trying to figure out I can drive it 20 miles one way and no problem s then get off work 8hrs and it will die acts like wont take any gas was told fuel pump so changed fuel pump and filter plz help it only has 60 thousand miles it

SOURCE: i have a 1999 mazda

My car has a similar problem, if you take it to AutoZone or Advance Auto Parts they will usually scan it for codes at no charge. My problem is a bad Map Sensor. Hope this helps.

raj somaiya

• 2272 Answers
• Posted on Sep 05, 2010

SOURCE: 94 4Runner 6cyl. 3.0 4x4

If the fuel pump operates with with a jumper at data link.That clears that the fuel pump is running.So check the EFI relay and the fuel pump relay. Now what is EFI relay:--- EFI Main Relay The EFI fuse supplies constant battery voltage to EFI main relay. The EFI main relay provides battery voltage to +B terminal of circuit opening relay (some models) and data link connector. Depending on model, EFI main relay may either be turned on directly by ignition switch or by M-REL terminal of Engine Control Module (ECM). The EFI main relay may also provide battery voltage to +B and +B1 terminals of ECM when ignition is turned on. The EFI main relay is located in engine compartment relay box. NOTE: Circuit opening relay is used on all models. Circuit Opening Relay Circuit opening relay controls fuel pump circuit. The Engine Control Module (ECM) receives an input signal at STA terminal when engine is cranking. Starter signal is also applied to STA terminal of circuit opening relay. Starter signal energizes circuit opening relay during cranking. Circuit opening relay then provides voltage to fuel pump or fuel pump relay.The circuit opening relay is grounded by ECM through FC terminal.Fuel Pump Relay & Fuel Pump Resistor .Fuel pump relay receives voltage from circuit opening relay and operates fuel pump. Fuel pump operating speed may be varied by Engine Control Module (ECM). When ECM grounds fuel pump relay, relay contacts close, and voltage is supplied through fuel pump resistor, to fuel pump. This changes fuel pump operating speed. ---------------------- As there are many other possibilities to check out of the mentioned procedure.But as you said fuel pump works with jumper wire and the fuel pump relay is replaced,on as per that i think the problem is the Fuel pump relay connections.The relay ground wire is connected to the ECM.If this wire is not connected properly or if this ground wire is got short or in-case not connected,then the ECM will not send signal to fuel pump relay to get started so it will not let the fuel pump start.But in jumper wire connection the relay is bypassed so no ground connection required and due to that fuel pump works. Thanks. Keep updated for any more query. You can rate this solution and show your appreciation

SOURCE: After putting premium gas in my 2003 focus on

Hello, Have a comment or two about your car. First thought was about Inertia switch in the rear cargo area of your vehicle. There is a reset button on the impact (inertia) switch for the fuel pump. You should hear the pump run the first second or 2 when you turn your key. It also has a power relay which should be in a black box of relays. There is also an Ignition relay on some Ford products.

When you tried the Starting fluid, you said it did not Start. But did it hit at all? When you did not have any codes on the computer, did the computer and the scanner connect or was the computer dead? Dead computer equals no codes.

There are a few things you can do and what I would try if I was there. Check the relays I mentioned. Go back to the basics and check for spark at the plugs and compression. If possible check fuel pressure at the Injector rail (which could lead back to a bad fuel pressure regulator). Check for power at the TPS switch at the throat of the Airhorn.

If you have no power to the TPS, or the fuel pump, check the Ignition switch. You have power for cranking, but the RUN terminal on the Ignition switch is a different terminal. Now for any missing test tools, you can get Loaners at Autozone and Oreillys with a deposit.

Would like to know the outcome of this problem. Thanks