Question about 2003 Ford Focus

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Rough idle 2003 Focus LX: just started idling rough when at stop signs. Spark plugs and wires have been replaced. What's the next thing to check?

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  • BonKai Jun 16, 2008

    Thanks! I'll let ya know.

  • Anonymous Mar 29, 2014

    rough idling and sputters



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Check ur coil pack for cracks my wifes cousin car done the same thing and the coil pack had a hair line crack in it

Posted on Jun 16, 2008


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1988 2.8 s10 idles rough and backfires out tb. replaced ignition module and spark control unit, coil, plugs and wires. No help.

In a nutshell...Choke valve, linkage and fast idle cam must operate freely. A non-functioning idle stop solenoid (if equipped) could cause stalling or rough idle. The reason why is that it minimizes strain on starter and battery and reduces the possibility of backfiring when attempting to start the engine. Check to see if it is equipped with the above Solenoid and the other three items are in proper working order. If this doesn't help we go to the next steps.

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2009 Ford Focus 1.8 engine nearly stalls when coming to a stop rough idle

check for vacuum leaks especially in the vent control hoses or auto box actuator.

Feb 06, 2015 | 2009 Ford Focus 1.8

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What is the proceedure to restore normal idle to 2003 Ford Focus after battery reset?

sounds like bad plug wires .take one off at a time to see if ther is change in the ide to find the bad wire

Sep 09, 2012 | 2003 Ford Focus

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2000 kia sportage rough idle after warm up

You could try and adjust your idle.

Check your idle air control valve.

Make sure there are no fluids leaking and that your emissions lights are not showing up like check engine this could mean there is an issue and there should be a readable code for this.

It could be something as simple as a spark plug wire or plug possibly even a coil pack.

It is real tough to judge for sure could be many things start with the elbow grease stuff first then move on to stuff that may have an expense.

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1 Answer

Engin started to idle rough at a stop sign amd quit. Was able to start it after about 20 min. but it still idled rough and died again. Had it towed home. Next Am it started right up. I held the rev a about...

Did you check for water in the spark plug wells? The spark plugs in this engine are recessed very far down, and if that area was to get water in it, there is no where for it to get out. I had that problem with my brother's MR2 once, as well as a problem with oil getting in there and causing a problem with the spark plugs. I suggest pulling out the spark plug wires, take off the shroud that covers the spark plug holes, and shop-vac or mop up any water that may have gotten in there.

Other option is water getting into some of the sensor plug wires. I would check the MAF/MAP area first.

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I have intermittent rough idle on my 2003 nissan altima. car shakes in gear at stop, mostly fine in neutral.

Replace the spark plugs, spark plug wires, distributor cap, and rotor. Next, check the idle air control valve and replace it if found faulty. If it still shakes, have the timing checked out

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3 Answers

2004 Ford Focus LX, was sputtering while driving

A flashing light is BAD. Its damaging the cat converter. I would check or replace the spark plug wires ( if all OK, then) replace the coil pack. I would not replace anything unless they test bad. but these car are known for bad coil packs.

Apr 25, 2010 | 2004 Ford Focus

1 Answer

92 Honda Accord LX- idles rough when started up

sticking valves. the short run of the engine free's them enough to enable runnig

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2002 chevy trailblazer has rough idle

it could be an o2 sensor. it could also just need a tune up

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