Last post on Dec 02, 2013 at 4:56 PM
You are in the Ford Taurus/Mercury Sable
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Ford Taurus, Mercury Sable, Fuel System, Sedan
#143 of 177 2001 Sable loses fuel pressure when key turned off
Apr 06, 2012 (5:54 am)
I have a 2001 Sable (Duratec DOHC V6). It runs good and starts good except after setting for more than 4 or 5 hours. The problem started after replacing the fuel filter. I found that in the morning (after setting overnight in the garage) it would crank over repeatedly (up to 6 or 8 or 10 seconds) until I lightly pushed down on the gas pedal. I checked the fuel pressure on the main fuel line supply schraeder valve after the car set overnight and found no pressure before starting. When I turned the key on (NOT cranking it over yet) I got about 7 psi. I let the key ON for about 5 seconds and turned it off.... the pressure immediately dropped to about 5 psi,,, I turned the Key ON again for 5 seconds (NOT cranking yet) and the pressure came up to about 15 psi.. Turned the key off and the pressure dropped a bit again back down to 11 psi... Turned the key ON again,,,, pressure up to about 22 psi and then I cranked it over and it started up immediately (without even needing to touch the gas pedal). The running fuel pressure was about 57 psi,,, but as soon as I turned the engine/key OFF,,, the pressure began dropping very quickly down to about 15 to 20 psi within 30 seconds. I read that the pressure should HOLD at about the running pressure for about 30 seconds and then "bleed off" a bit after that, but that it shouldn't DROP out that quickly. Seems like there must be a check valve somewhere that isn't working, but I can't get a straight answer to exactly where the problem is. I've heard that there is a check valve on the fuel pump/assembly in the tank, but no one has been able to tell me IF that is the most likely problem. I would replace it IF I were more confident that there isn't a potential problem somewhere else in the fuel system (i.e. maybe there's some sort of purge or pressure relief in the fuel rail,, or regulator??). There is a "shiny chrome" thing that looks like a one way valve or pressure regulator that is in the main fuel line (passenger side engine compartment near firewall), but even with my Factory Service manuals, I can't find anything that shows that part/item or what it is. the number on the item is "F1ZE-AA 000725B". I've never had a problem that no one (including the Ford Service Department) seemed to know what to tell me to help. ANY help or information would be very much appreciated.
#144 of 177 Re: 2001 Sable loses fuel pressure when key turned off [2001sable]
Apr 15, 2012 (11:07 am)
Hey, 2001sable: that shiny chrome valve is definately a fuel pressure regulator (~$20) which is easy to replace but the problem could be in the pump as well.
#145 of 177 1990 Ford Taurus Problem with my Transmission
Jul 08, 2012 (3:47 am)
Hello everyone! I have a Question for you! I just replaced my motor mounts on the front and rear of the passenger side, after I replaced them I took her for a test drive and she seemed to be driving like my problem was fixed, well after driving her about 30 miles she starts shifting to early at first it was just once in awhile then it was constant, so i got worried and have not driven it sense, I opened the hood and took the battery cables off waited about 5 minutes then i hooked them back up started the car let her idle for about 10 minutes then she started to make this noise I never heard before, I put her in drive (nothing) put her in reverse (nothing) she would not go into gear, so i turned her off went into the house came back out 10 minutes later, started her up put her in drive, she went into gear with no problem, but that noise is still there and I do not trust driving her because I don''t want to take a chance of blowing something up.
MY QUESTION: IS THERE A POSSIBILITY THAT WHEN I CHANGED THE MOTOR MOUNTS, THAT I DID SOMETHING TO MISALIGNED THE TRANSMISSION TO THE MOTOR, BECAUSE WHEN CHANGING THE MOTOR MOUNTS I HAD TO MOVE THE ENGINE LIKE 2 INCHES IN ORDER FOR THE MOTOR MOUNT IN THE REAR PASSENGER TO LINE UP( I HAD TO MOVE THE ENGINE FORWARD AND THEN BACK)
PLEASE LET ME KNOW IF ANYONE HAS ANY IDEA WHAT THE PROBLEM IS....
THANK YOU: LADYAUTOMECH......
#146 of 177 Re: 1990 Ford Taurus Problem with my Transmission [ladyautomech]
Jul 27, 2012 (12:12 am)
sorry for a late reply. i did replaced motor mounts, as well as transmission itself on my taurus several times. used to have smth similar problem ones, but it was related to misaligned kickdown cable spring, it can be tuned easily following your repair manual like chilton or haynes. Your description of noise also suggests there could be more severe a problem, even independent of what you did (a coincidence). If kickdown doesn't help, i would suggest to have a friend to listen from under the car, while you are shifting transaxle -- where does the noise come from: an engine or the transmission, any vibration or parts loose? If its transmission, you may simply "drop" it (without removing the engine, only CV joints), quick check it and the converter and reinstall it back (or overhaul the transmission, taking this opportunity, even better). Let forum folks know if it doesn't help!
#147 of 177 2007 Taurus starting problems
Jul 30, 2012 (11:23 am)
Any ideas out there on what would cause difficulty starting, either warm or cold? It's been happening intermittently for months, but has recently gotten worse. There's been times when it's gone weeks without a problem. When it does occur, the gauges often twitch for a few seconds before returning to normal.
#148 of 177 Re: 2007 Taurus starting problems [autumnleaf1962]
by Kirstie@Edmunds HOST
Jul 31, 2012 (5:50 am)
When you say it has difficulty starting, what happens when you try to start it? Does it just click and then nothing? Does it try to turn over and fail? Please provide whatever details you can to help others find the source of your issues.
#149 of 177 Re: 2007 Taurus starting problems [kirstie_h]
Jul 31, 2012 (8:11 am)
My car turns over and fails. Once it starts, it runs fine. Usually it starts after two or three tries, then all the dashboard gauges twitch for a few seconds. This has been happening for 8 months. Sometimes I have driven it for a week or two without any issues. My husband tested the pressure coming from the fuel pump and it seemed to be good. Also, he unhooked the fuel line somewhere under the hook and drained some bad gas and particles out of the line.
#151 of 177 Re: 2007 Taurus starting problems [autumnleaf1962]
Aug 08, 2012 (8:41 pm)
Hello, what year/model your Taurus is? Does it have EGR, or you have already blanked that useless thing off? Are there any error codes written in car computer?
It seems like it's more of a spark problem than gas. Try beating this one by an exception method (it will be like small overhaul for your car, at the same time):
1. Кeplace fuel filter(~4$)
2. Change motor oil. Install new oil pressure switch (~5$).
3. Replace PCV valve (~1$) and air filter ~4$
4. Replace the Ignition Control Module (ICM often is faulty on Taurus!) ~25$
5. Make sure your battery is not weared out, and alternator is charging it fine.
6. Replace those whitish cracked plumbum clamps on your battery terminals, they are oxydised from inside.
7. Install new spark plugs, check the spark cables.
8. Replace the distributor cap ~8$ with a new distributor rotor (~3$)
9. Install new starter solenoid ~5$
All can be done in your home garage, or in the open air. Changing those parts will also help if there are any loose/oxidized connectors causing extra resistance. If problem persists, and there are no any error codes in the computer, consider to go for major expenses like wash fuel system/clean injectors at your preferred auto service (~150$); buy a new starter ~50$ or new fuel pump (~60$), costly but won't hurt your car anyway) Hope it helps a bit.../arctic_taurus
#152 of 177 Re: 2007 Taurus starting problems [arctic_taurus]
Aug 14, 2012 (8:12 am)
Thanks for the info. It's a 2007 Taurus/SEL, not sure what engine it has, but it's not DOH.
We were thinking it might be a fuel rail issue or the sensor/regulator that's located at the end of the fuel rail. My brother ran an app on it and I believe it said bank 1 was running lean.