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    tealej1's Avatar
    tealej1 Posts: 20, Reputation: 1
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    #1

    Jul 10, 2013, 07:55 PM
    2004 ford escape code p0340 and p0174
    At first it only gave me code p0340 then I changed the cam and crank sensor disconnected the.battery for 10 min. And turned it on didn't accelarate or turn anything on for 3 min. And still same side affects. Witch are squeaky belt very bad engine vibration hard to start . Stalls and very slow accelaration. Can't use the a/c on high or it'll stall my wife's car please help
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Jul 11, 2013, 10:32 AM
    For the P0174, check for a vacuum leak; e.g. hoses after the MAF Sensor and around the UIM. Also, make sure you have changed the fuel filter in the last 25,000 miles. A clogged fuel filter can cause a lean fuel situation. If the problem persists, focus on the MAF Sensor. Should you end up replacing it, go with a new sensor--remanufactured MAF Sensors have been problematic.
    tealej1's Avatar
    tealej1 Posts: 20, Reputation: 1
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    #3

    Jul 11, 2013, 06:40 PM
    I just about the car so I don't know the maintnace history also I don't know what the uim is I checked for vacuum leak I saw one small hose pinched I replaced it . I can hear ind of like hising noise from were the intake manifold is I don't know if its afaulty gasket or what
    tealej1's Avatar
    tealej1 Posts: 20, Reputation: 1
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    #4

    Jul 11, 2013, 08:30 PM
    Can you post a wiring diagram and spec. Voltage the maf sensore should be reading
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #5

    Jul 12, 2013, 06:33 AM
    UIM=Upper Intake Manifold. Sounds like this is your problem and it needs to be replaced.

    MAF Sensor voltages are nearly impossible to test. Best to use an advanced scan tool.
    tealej1's Avatar
    tealej1 Posts: 20, Reputation: 1
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    #6

    Jul 13, 2013, 01:44 PM
    I replaced all intake manifold gaskets and some vacuum hoses and now I only have the p0340 code it still stalls and all but in idle it sounds better the before
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #7

    Jul 14, 2013, 08:38 AM
    Try clearing all old codes with your code reader. Also, check the wiring and connectors going to the sensors.
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