Engine Performance problem
2003 Ford Focus 4 cyl Front Wheel Drive Automatic 85000 miles
I was just wondering why my car would be affected by just changing the spark plugs. It feels like it is a cylender short, it doesn't accelorate, and there is a smell like something is burning. The spark plugs are in good condition and are tightened securely.
Check spark plugs gap.
.050 (In thousandths of an inch)
When installing spark plugs, use your finger tips, turning the spark plugs in clock wise. So they can be well seated before using socket wrench.
Fail to do so will damage the tread in the cylinder head and cause compression and misfire issue.
Make sure the boots are well seated on all plugs, and the wire is not broken inside one of the boot. Replace the spark plug wires if you doubt.
Replace one spark plug and wire at the time to avoid having problem with the firing order.
The burning smell is caused by a misfire.
February, 7, 2010 AT 1:46 PM
Thanks it was a gap issue, everything runs fine now. Thanks for your help
February, 11, 2010 AT 10:31 PM
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