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Yet Another No Start

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  • #16
    I get 12V to ground from pin 3 on position 1,momentarily. The voltage then drops. I assume this is the priming ?

    When I took the pressure gauge off the schrader value, some fuel did leak out, but there is no spray. If the fuel filter is completely clogged, would this fit the symptoms ? I suspect the fuel filter is the original one (250K miles on it).

    thanks,

    Mad Dog

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    • #17
      You have power to the pump. No pressure at rail, it's bad. A fuel filter would have to collapse to cause a no start. Replace the fuel pump module

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      • #18
        Im waffling, arent I ? I really don't want to have to replace the fuel pump, but it appears I will have no choice. Now I have to decide to drop the fuel tank or cut up the bodywork near the access port. Why didn't they make the damn thing large enough ?!?!?!?

        Mad Dog

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        • #19
          Can't figure out why Ford didn't make the hole in the sheet metal larger, but it's easily fixed with some aviation snips and some light gauge sheet metal to cover the hole.
          http://s301.photobucket.com/user/gmo...?sort=9&page=1
          If the tank is relatively empty, just drop it, if it's full, cut sheet metal. My last pump failed in the garage right after filling the tank, really poor timing, and why I have those photos.
          I collect Ford's Red-headed step children.
          1985 SVO Mustang (turbocharged track rat)
          1989 Taurus SHO (supercharged track rat)
          1999 SVT Contour (Sedanus-Grocerygetter-Rapidus)
          2008 Mercury Milan Premier (Comfy boat)

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          • #20
            Its about half full. Which would you recommend ?

            thanks,

            Mad Dog

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            • #21
              I would cut sheet metal and do it from the top.

              If you're interested, i have a slightly used (3 months) updated motorcraft pump assembly i can let go of.
              http://mefi.us/images/fuelly/smallsig-us/78388.png

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              • #22
                Come in through the top. It's not too bad at all, just take the rear seats out and you're there! I took some shears and carefully snipped and pulled back the metal, and then put it back over when I was done. COming in from up top makes it so much easier. Have a bucket handy to put the old pump in and some rags for the drips that spill. DO NOT, DO NOT, DO NOT buy an aftermarket pump, get the Motorcraft one. I am on my second NAPA in less than a year

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                • #23
                  I use anything other than Motorcraft pumps and zero issues. The most common reason for failing pumps early is not enough fuel in the tank to prime them instantly, I used to warranty them all day long. People put a gallon of gas in car and expect it to start and run..........NO. The pumps will commonly stand maybe one minute max of dry running before the plastic impeller begins to deform and melt and pump junk then. Why the owner manuals now all say to never run tank dry of fuel, it tears up the pumps way early.

                  On my non-module type Contour I use 5 gallons in tank at least and instant starting after having primed the pump up before the try to start. That old design pump sits way up in the air and has to prime really good to work.

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                  • #24
                    I had momentary Jesus moment. I took the air box off just in case it wasn't getting air, and it started first time ! Even after putting the airbox back on, it started just fine. I could hear the pump prime, and I ran it for 10 minutes in the garage and I even gunned it to see if the pump stumbled.....no problems. 2 hours ago, I took it around the neighborhood, and it died again right at the top of the hill. No start-O. I was able to roll it down hill in front of my house. Just when I thought everything was peachy ! Good thing I didn't take it out of the neighborhood. So, Im siphoning the gas out now. Just going to have to nut up and take the pump out. More than likely Im going through the top.

                    Mad Dog

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                    • #25
                      At the risk of sounding dumb again, I forgot to check the fuel pump relay. The relays looks to be all the same, so should I swap one relay for another (lets say, the AC....) and see if that works ?

                      Mad Dog

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                      • #26
                        The 5 relays in the rearward end of the power distribution box are all the same; horn, fuel pump, hi-beam, low-beam and EEC power are all interchangeable.
                        I collect Ford's Red-headed step children.
                        1985 SVO Mustang (turbocharged track rat)
                        1989 Taurus SHO (supercharged track rat)
                        1999 SVT Contour (Sedanus-Grocerygetter-Rapidus)
                        2008 Mercury Milan Premier (Comfy boat)

                        Comment


                        • #27
                          Why aren't you using your brain at post #24 to again check if the pump is not running again after it quit again????

                          Not thinking there at all. Maybe doing the rest for nothing. As soon as car quit you should be checking if pump is spinning up, it would direct your next move.

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                          • #28
                            When it died at the top of the hill, I tore out the rear cushion again. I could not hear the pump prime, so back to the original problem. I will check the signal to pin 3 again and swap relays but the pump only had a last gasp of life, I guess.

                            Im waffling. I admit it.

                            Mad Dog

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                            • #29
                              OK, it has to be the fuel pump. I swapped 2 relays and after sitting 2 weeks, it stated up for a moment then died. I cant hear the sound of the pump priming. Other than spending an arm and a leg for an NOS Motorcraft part, are there any reputable good quality replacement pump kits that have all the o-rings and misc parts ?

                              Mad Dog

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                              • #30
                                Just get a fuel pump from any national auto parts place. They are all similar in construction.
                                Don Higgins
                                Crew Chief Pro Drag Racing Software
                                http://www.crewchiefpro.com
                                1999 3.0 Turbo CSVT ** 2013 American Dragster with 1100 Horsepower 7.28 @ 185 mph

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