Question about 2001 Ford Focus

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Ford Puma 1.7. Misfire

Mising under load and at idle, replaced coilpack, plugs and leads, swaped injector rail from another puma and problem still there.
Ford say to repace plugs and leads at same time and use silicone grease on out side of plug, waiting on new leads to arive.

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  • Master
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Old School...
If the engine is misfiring then the cylinder doing the misfire if irt is only one that is will be easy to read...
As you pull each plug examine it. compare them to eachouter as you do this...
The plug that skips will be wet or more blackened from carbon build up.
Now you know with one. First check toat plug wire and also examine the supressor, that is the part that keeps the wire connection to the plug. Look under the garmets or the rubber insultors on this unit. see if ther is any pothole burn marks. These thing should be part of the ignition wire when you changed the set. Another is to check the compression. With the gauge connection replacing the sparkplug ...At full trottle crank the engine using the ignition key sound like about 4 times.
The gauge should read over 110 if this number is less reset the gauge and do it again a couple of times to make sure. Now doing it over and over still gets you a lower reading then that cylinder piston or valves is not sealing properly letting air escape on the compression stroke reducing the combustion ration and getting a bad burn making the engine skip. I had this happen to me and all it was was a bad suppressor a new, wire set worked.

Posted on Jul 26, 2009

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  • Ford Master
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Timing/timing belt okay?

Posted on Jul 26, 2009

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Ford puma 1.4 . just had a small front offside bump (damaged wing and broke the headlight ) car now running lumpy.


I, feel sorry for you, after reading your problem, but don't worry you visit the Reliable-Store they will help you for sure.
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If you havent replaced the sparkplug, try doing so to see if its that simple.

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You could try swaping the #4 injector with another and see if you can cause a different cylinder to miss. If it does, that's your culpret.

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