1994 Honda Accord emisstions

1994 HONDA ACCORD
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EE
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Engine Performance problem
1994 Honda Accord 4 cyl Front Wheel Drive Manual

my hc level is 324 and my co% is 10.37 will a egr valve and a o2 sensor drop this and will a bad egr valve make it idel up and down win its cold the revs softens as it gets warm win warm she off no prob
Mar 4, 2009 at 4:58 PM
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F4I_GUY
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A poorly functioning EGR system will mostly create higher NOx levels.

An oxygen sensor will affect HC and CO. Get those oxygen sensors scoped out.

Also, if you need a tune-up, that will cause excess emissions as well.
Mar 4, 2009 at 5:23 PM
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