High Hydrocarbon on Emmission Test

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  #1  
Old 04-22-03, 01:37 PM
MJE49
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High Hydrocarbon on Emmission Test

My Jeep Cherokee failed the emmissions test today for high hydrocarbons. Here are the specs. 1987 Jeep Cherokee, 4 cyl, 4 speed, 4wd, 187,000 miles. Test results were: Hydrocarbon tested 2.74 standard is 2.20 - failed. Carbon Monoxide tested 9.20 standard is 55.0 passed. Oxides of Nitrogen tested 5.44 standard is 3.50 N/A. Any suggestions as to what I might do to improve the HC? Thanks.
 
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Old 04-22-03, 04:23 PM
Joe_F
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When's the last time the vehicle saw a full tuneup?
 
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