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Need help ASAP. 1999 Ford Taurus, no fuel pressure

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  • #1

    Need help ASAP. 1999 Ford Taurus, no fuel pressure

    So here's the deal. My brother has a 99 Ford Taurus that is usually a great runn'n car. However, in the past couple of weeks it's developed quite the weird problem. From time to time it won't start. However, when it does start it runs just fine.

    So here's what we've done.
    • Replaced the dpfe
    • Replaced the vacuum lines on the dpfe
    • Tested the voltage at the fuel pumpe .156 volts. (I think we did that right.)
    • Ensured the inertia switch isn't causing problems. (It's in all the way.)
    • Ensured all the hoses, wires, etc, look to be connected correctly.
    • Ensured there's fuel in the tank.



    Any ideas? Willing to try anything. My brother is about 3 hours from home in the small town of Brady Tx and is not in a position to have it towed to a "good" shop for diagnostics. Also, because we're way out here and not at home in DFW I'm relegated to true shade tree mechanic tools. e.g. A simple digital multi-meter and basic hand tools. Near as I can tell we don't have an SES light yet..... (Even if the SES light came on we couldn't read the OBDII code....)

    Any help would be greatly appreciated and the winner gets a few cold frosty's w/ me when we get back to DFW.
    Thanks!
    Darren M.
    Originally posted by Taya Kyle, American Gun
    There comes a time when honest debate, serious diplomatic efforts, and logical arguments have been exhausted and only men and women willing to take up arms against evil will suffice to save the freedom of a nation or continent.
    Tags: None
  • #2
    Is there a shrader on the fuel rail?

    Could be fuel pump going down.
    "If I asked people what they wanted, they would have said faster horses." - Henry Ford

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    • #3
      Check the relays above the cooling fans in the front of the engnine compartment. They are bad about corrosion causing a bad connection. The fuel pump relay is there and may be causing the issue.

      Comment

      • #4
        .156V at the fuel pump?? There's your problem. It should be <12V. You should hear it buzz when you turn the ignition on. Try spraying some carb cleaner or other flammable stuff down the throttle body and see if it fires up for a second.

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        • #5
          Yeah, the schrader valve had pressure for a while, when it's running. Would the fuel pump be intermittent like this? If it were to be going down would it run great once it started and continue to run?
          Thanks for your prompt response! (DJ?)
          Originally posted by Taya Kyle, American Gun
          There comes a time when honest debate, serious diplomatic efforts, and logical arguments have been exhausted and only men and women willing to take up arms against evil will suffice to save the freedom of a nation or continent.

          Comment

          • #6
            Originally posted by Buick355 View Post
            .156V at the fuel pump?? There's your problem. It should be <12V. You should hear it buzz when you turn the ignition on. Try spraying some carb cleaner or other flammable stuff down the throttle body and see if it fires up for a second.
            That's the weird part! I measured, what I think, was the fuel pump power wire and it read only .156v even when it "hummed" when we turned on the key. When the car doesn't run the "humm" doesn't exist when we turn the key. We'll try the starter fluid tomorrow.
            Originally posted by Taya Kyle, American Gun
            There comes a time when honest debate, serious diplomatic efforts, and logical arguments have been exhausted and only men and women willing to take up arms against evil will suffice to save the freedom of a nation or continent.

            Comment

            • #7
              Originally posted by SBFORDTECH View Post
              Check the relays above the cooling fans in the front of the engnine compartment. They are bad about corrosion causing a bad connection. The fuel pump relay is there and may be causing the issue.
              Corrosion @ the relay. I hadn't thought about that. I did check the relays they seem to be ok. (Did some minor testing w/ 12 v applied to the power side and a ohm-meter on the connection normally open side. The relay "closed".) However, I hadn't thought about corrosion. How can I clean the female slots if they are corroded? Also, is it safe to assume that the relays above the fans are the only fuel pump relays we should worry about?
              Thanks!
              Originally posted by Taya Kyle, American Gun
              There comes a time when honest debate, serious diplomatic efforts, and logical arguments have been exhausted and only men and women willing to take up arms against evil will suffice to save the freedom of a nation or continent.

              Comment

              • #8
                Originally posted by Darren M View Post
                Yeah, the schrader valve had pressure for a while, when it's running. Would the fuel pump be intermittent like this? If it were to be going down would it run great once it started and continue to run?
                Thanks for your prompt response! (DJ?)
                It COULD, sometimes they start getting weak and dont make a good connection when the relay kicks it on.

                My 86 would start and run fine, then it would spit and sputter, then not run at all, then fine.

                Turn the key to RUN, check the shrader, if it has fuel, fire it up. Repeat until it doesnt start up. If it has fuel, you know it is something non fuel related, either pump or power to it. It only needs air, fuel and spark to run.
                "If I asked people what they wanted, they would have said faster horses." - Henry Ford

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                • #9
                  I'm going to take ya'll's advice as well as some I found on the net and try to get this thing back to DFW.
                  Thanks!!

                  For future needs ....
                  1998 Taurus-Fuel Pump not always running at startup- - Ford Taurus Forum
                  http://www.fordtaurus.net/forums/viewtopic.php?f=33&t=12685

                  http://fordgenie.com/Ford/Taurus/For...em-080338.html

                  How to Videos, Articles & More - Discover the expert in you. | ehow.com
                  http://www.ehow.com/how_4865511_troubleshoot-ford-taurus-fuel-system.html
                  Learn how to do just about everything at ehow. Find expert advice along with How To videos and articles, including instructions on how to make, cook, grow, or do almost anything.
                  Originally posted by Taya Kyle, American Gun
                  There comes a time when honest debate, serious diplomatic efforts, and logical arguments have been exhausted and only men and women willing to take up arms against evil will suffice to save the freedom of a nation or continent.

                  Comment

                  • #10
                    Ok, I've cleaned the terminals and checked the voltage at the relays over the cooling fan. All look ok. Have checked the voltage at the inertia switch and it shows 12v at acc dropping down to around 6 to 7 when trying to "start". I've tested the inertia switch and it maintains "closed" when depressed and open when "hit" on my hand.
                    No, again w/ the weirdness. Checking for voltage at what I believe is the power line for the fuel pump I'm only seeing about 4 to 5 volts, regardless of when. Can anyone confirm the color of the fuel pump power line? I'm thinking it's red with a pink stripe.
                    Any ideas?
                    I can't get under the car at this point so everything is through the body. WHY THE FUCK ISN'T THERE AN ACCESS PANEL OVER THE FUCKING FUEL PUMP?!?!
                    (YEs, I understand the economy of it....)
                    Originally posted by Taya Kyle, American Gun
                    There comes a time when honest debate, serious diplomatic efforts, and logical arguments have been exhausted and only men and women willing to take up arms against evil will suffice to save the freedom of a nation or continent.

                    Comment

                    • #11
                      Standby..booting Alldata, brb

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                      • #12
                        PK/BK ....goes from the inertia sw to the pump, you should have a YE/WH wire also thats the sender. Grounds are, BK (motor) and BK/YE(sender). As for the fuel pressure, KOEO 37-45 psi, KEOR 35-45 psi. All info is from Alldata, looked up a 3.0 vin u.

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                        • #13
                          Originally posted by JimD View Post
                          PK/BK ....goes from the inertia sw to the pump, you should have a YE/WH wire also thats the sender. Grounds are, BK (motor) and BK/YE(sender). As for the fuel pressure, KOEO 37-45 psi, KEOR 35-45 psi. All info is from Alldata, looked up a 3.0 vin u.
                          TY, it is a 3.0. I can/will get the VIN if it would help. I REALLY appreciate the help you guys. Ya'l really are the best!

                          At this point we have 0psi on the fuel at the schrader valve so we're replacing the pump. Stupid local NAPA gave us the wrong damn pump.... 20 miles back into town......
                          Originally posted by Taya Kyle, American Gun
                          There comes a time when honest debate, serious diplomatic efforts, and logical arguments have been exhausted and only men and women willing to take up arms against evil will suffice to save the freedom of a nation or continent.

                          Comment

                          • #14
                            Originally posted by Darren M View Post
                            TY, it is a 3.0. I can/will get the VIN if it would help. I REALLY appreciate the help you guys. Ya'l really are the best!

                            At this point we have 0psi on the fuel at the schrader valve so we're replacing the pump. Stupid local NAPA gave us the wrong damn pump.... 20 miles back into town......
                            No way! Napa the wrong part!!??

                            Thought only autozone gave the wrong part??! WTF!!'

                            320rwhp. 7.67 @ 90mph 1.7 60'

                            DD: 2004 GMC Sierra VHO 6.0 LQ9 324whp 350wtrq

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                            • #15
                              Got the right pump, tested with the tank on the ground, put the tank back and it fired right up! Thanks for all the help!! You guys rock! I'm happy to buy the beer you name the time! 
                              Originally posted by Taya Kyle, American Gun
                              There comes a time when honest debate, serious diplomatic efforts, and logical arguments have been exhausted and only men and women willing to take up arms against evil will suffice to save the freedom of a nation or continent.

                              Comment

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