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Ford focus 2001 zx3 107xxx. I have replaced the spark plugs, wire set, fuel filter,fuel injectors,timing belt,valve cover,throttle, motor mounts, vacumm leak. Car felt rough after the vacumm leak hose was replaced so I did the wire set wich I needed but still the same and shakes a little with a rattle notice when stopped or air is on. Now I'm told to change the serpentine belt and idler pulley along with steering fluid. Would that do it ? Any other suggestions ?

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  • Cars & Trucks Master
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It appears that you have done everything except have the fault codes read. Try doing that and see what sensor is not working.

Posted on Apr 24, 2013

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localwonder
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SOURCE: I have a 2001 Mercury Sable the check engine light

Hi, this is an issue that concerns the coil pack on your engine. It is malfunctioning. and, i recommend testing to make sure of thsi issue.

Check for dirt, corrosion or damage on the terminals and repair as necessary.

Measure coil primary resistance between ignition coil pin 4 (B+) and pins 1 (coil 2), 2 (coil 3) and 3 (coil 1) .


Resistance should be 0.3-1.0 ohms. If resistance is out of specifications, replace the coil pack. If resistance is within specifications, proceed to secondary windings testing.



Coil 1-cylinders 1 and 5 Coil 3-cylinders 2 and 6 Coil 2-cylinders 3 and 4


Resistance should be 12.8-13.1 kilohms. If secondary resistance is not within specification, replace the coil pack.

You can jump this link below for a good look at a diagram of the coil pack.

Click Here


Posted on Jul 11, 2009

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1 Answer

2001 ford taurus,lopes when first started,when cold.


intake manifoold leak check all vacuum lines replace all vacuum lines if look cracked ,spark plugs could be fouled out by leaking fuel injectors, clean fuel injectors,replace fuel filter,replace air filter,replace spark plugs and wires,do tune up see if it helps if not.could have leaking intake manifold gasket or leaking egr valve,use engine vacuum gauge check engine vacuum for intake manifold gasket leaks.

Sep 23, 2012 | Ford Cars & Trucks

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Hi I have a 1999 1.8 ford focus its misfiring on cylinders 1


Remove the top cover on the valve cover concealing the coils. Remove and inspect the spark plugs, and replace as necessary. Start the engine and see if the miss has been eliminated. If the miss is still there, a problem could also exist in the wires or coil or even the fuel injector, which will all need to be addressed as the diagnosis progresses. A fuel injector will cause the same type of a miss if it sticks.

  • 2 Mist the spark plug wires, and watch for evidence of arcing to the cylinder head cover. This will indicate a bad wire. If this is visible, then replace the spark plug wires.
  • 3 Turn the engine off, and loosen the wires at the coil by giving them a twist and pulling them out of the coil. Leave them on the coils--you just want to loosen them a bit to make the next step easier.
  • 4 Start the engine. Using a pair of pliers with insulated handles, pull one plug wire out of the coil at a time and watch for a noticeable drop in engine RPM. The cylinder that has no drop or noticeable decline in RPM is the one causing the miss. Also when the wire is removed, watch for a good spark at the coil to the wire when the wire is held close to the coil. This could indicate a bad coil if the plug wire checks out fine.
  • 5 Check the suspect wire with the Ohm meter, and test for continuity through the wire. If there is continuity, the miss is still present and there is no spark to the wire when it is removed from the coil, replace the coil.
  • 6 Check the fuel injectors. If the plugs and wires are good and there is a spark at the coil to wire test, then checking the injectors is the next step. If this is fine, then a compression test should be done to locate an internal engine problem. Start the engine, and remove the electrical connectors to the fuel injectors one at a time and listen for a significant engine RPM drop. If one cylinder is found to make no difference or very little in comparison to the others, replace the injector.
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    Changed timing belt on 2001 kia sportage but still runs rough


    I would check the connectors on the coil packs, spark plugs and wires and replace them if they at all seem worn or tired. My 2000 sportage ran rough so I replaced the fuel filter, coil packs, spark plugs and wires, cleaned out the IAC valve, TPS, throttle body and intake tube, tightened the screws on the fuel pump access door under the right rear seat and cleaned the ground wire and the contact surface and I added 1 ground wire from the block to the firewall and 1 from the valve cover to the firewall. Your timing is more than likely right where it needs to be but the ignition may be slightly missing from a bad coil pack, dirty or fouled plugs or a bad plug wire.

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    2001 ford focus had the spark plugs and wire change. Has a code po171.. ran good for two days. The spark plugs are blacker than acs of spades which is running rich. Don't know what to do next. To me its...


    PO171-System to Lean (Bank 1)

    Air filter cover tight?
    All intake ducting tight?
    Clean MAF Sensor.--CRC MAF Cleaner
    Fuel Pressure Regulator?
    EVAP Purge Valve-stuck open?
    Vacuum leaks?
    EGR System-issues?

    Seems your getting a lean O2 Code,because it is trying to correct for a rich condition,as you said.

    Is the Throttle Position Sensor-original?

    Work on what is driving it rich,my list is a possible.

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    Hello,
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    Once the fuel system is cleaned via a tankful of cleaner & gas then the idle controller motor would be next on the list to be replaced.

    Good Luck !
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