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High Hydrocarbons at idle

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Old 05-17-2008, 07:19 AM
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Default High Hydrocarbons at idle
Failed emisions today, my hydrocarbons are 45 points over the limit, at idle. (limit is 220, mine are 265) Passed the 2500rpm test. Did some searching in the FA and found pretty much the same troubleshooting tips that I've seen all over. Was wondering if someone could help narrow it down since I am only over at idle. The reading at the 2500rpm test was 90 out of 220. I did not replace the plugs before hand so I am going to do that, and then I am leaning twords o2 sensor.
Any imput is appriciated Thanks.
PS. Engine is a 7a btw
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Old 05-17-2008, 07:59 AM
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Default Dad just got his 7A to pass high HC at idle...
shop raised idle up a bunch... apparently like 1400rpm.
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Old 05-17-2008, 09:30 AM
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Default Re: Dad just got his 7A to pass high HC at idle...
Yeah I was thinking about doing that to get it threw but I would like to fix what is wrong with it in the first place
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Old 05-17-2008, 12:11 PM
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Default Last oil change?
If you searched you know that dirty oil can cause high HC at idle.
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Old 05-17-2008, 06:13 PM
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Aye, changed the oil a month ago.
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Old 05-17-2008, 07:13 PM
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Too long. Change it an hour before you go back.
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