Question about 2003 Ford Focus

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Miss fire focos 03 has started to miss fire. a week previous to this the wife ran out of petrol but car ran ok for a week following this and then started miss firing. I have changed the leads and plugs but still the problem persists could this be a fuel problem or electrical. Plese Help

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Run some injector cleaner through the system u could have some trash in one of the injectors

Posted on Jun 16, 2008

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Miss firing engine and black spark plug


Is it a two stroke machine , do you mix your own fuel.

If so over dosing on the oil component will cause your problem, check for the right mix levels and follow them.

Is the choke going full back to zero ?

Are you running the right type pf plug for that engine, some run hot some dont

Is the engine running smooth or lumpy.
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For a four stroke engine

Your engine may either be running very rich or there is wear on the bores causing oil to get to the electrode.

You can obtain a spark plug extender which takes the plug out of the direct line of fire

May 24, 2009 | 1997 Acura CL

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