Question about Ford Expedition

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03 expedition with 85K miles, 4.6 engine -- i step on the gas and car hesitates, sometimes the dash chimes, battery light comes on - never a check engine light. Today coming home could not get above 25 mph without frontend shuttering/shaking. put car in park and stepped on gas, which caused car to stall. waited 1 minute and started fine. changed fuel filter few days ago. fuel pressure reads 50PSI while running and drops to zero immediately when turned car off.

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  • kylesit Jul 15, 2009

    sorry about accepting... didn't know how this works.

    fuel pressure is 50PSI while running and drops right off when turned car off. Your other email referenced clamping fuel line to determine if pump faulty... where is this line located?


  • kylesit Jul 18, 2009

    We drove down the road and the PSI never moved when the car hesitated. Verified not a transmission problem - it was suggested could be an electrical problem. Would a code be thrown if the PCM was going?

  • kylesit Jul 18, 2009

    i have had it read twice and nothing. guess it's hunt and peck through the wires. i"ve read several that point towards MAF - although it looks clean i'll clean. thanks

  • kylesit Jul 18, 2009

    looking back thru work done and ford changed #8coil in dec 08, test code was P0308 and P0316 - do you know what these mean?

  • kylesit Jul 18, 2009

    no you didn't mention timing belt. they say spark plugs at 100K but for the cost i think i may try that.

  • kylesit Jul 22, 2009

    changing spark plugs this weekend. we did get the service manuals, however they reference a PC/ED manual for diagnosis and testing. Do you know where I might find one? been searching the net.

    finally threw some codes for 4 coils but i'm not convinced that's the problem as it is acting differently than when the #8 coil went.


  • kylesit Jul 23, 2009

    haven't had time yet to change plugs. this weekend. codes were for coils. may change those too. will let you know after changed.

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Hi I could not reply to your other question because you had accepted it. To follow up with your last question.


Any electrical component with a loose connection could face intermittent problems, but please do the tests that I suggested in the other solution and then start looking for a frayed wire, or a corroded or loose connection

Posted on Jul 15, 2009

  • 7 more comments 
  • Benjamin Patri
    Benjamin Patri Jul 15, 2009

    Don't worry about the accepting the other one as it didn't hurt anything. I have been trying to get that changed so I can still respond since new users like yourself don't know how it works. Anyway back to you newest question. The fuel line connects directly to the engine. Should be towards the back end of the engine towards the top. The end of it slips in and connects directly to the engine and looks like a small electrical connector with the line being about 1/4 to 1/2 in diameter. Look towards the center of the car, you should find it, if you disconnect it, you can verify it is the line since it will smell like gas.


    Benjamin


  • Benjamin Patri
    Benjamin Patri Jul 18, 2009

    Yes, one should be thrown. Have you gotten it read yet? If not then I suggest going and having that done as that would help a lot. AutoZone will do it for free.

  • Benjamin Patri
    Benjamin Patri Jul 18, 2009

    no problem, sorry that you are having so much trouble with this

  • Benjamin Patri
    Benjamin Patri Jul 18, 2009

    the p0308 is a misfire on cylinder 8 and the second code is in addition to it and will show up always with the first code.

  • Benjamin Patri
    Benjamin Patri Jul 18, 2009

    Did I ask you about checking the timing belt and whether it may have jumped a tooth? It probably is time to change it if you haven't done so yet.

  • Benjamin Patri
    Benjamin Patri Jul 18, 2009

    Alright sounds good, let me know how it goes

  • Benjamin Patri
    Benjamin Patri Jul 22, 2009

    Are all of the spark plugs sparking now that you replaced them? Did you check the timing? What specific codes did you get? Have you tried changing the distributor cap yet (I can't remember if I have asked this yet)? Is it still running like it was before or is it different now?

  • Benjamin Patri
    Benjamin Patri Jul 22, 2009

    PC/ED is the Powertrain Control/Emissions Diagnosis Manual. Try seeing
    if a local 5 star dealer will let you copy any of the manuals that they
    have. Usually they will.

  • Benjamin Patri
    Benjamin Patri Jul 23, 2009

    sounds good, thanks for the update

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