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Failed emissions - HELP
Posted 26 August 2005 - 09:36 AM
And NOTHING works, i tried a couple bottles of HEET and denatured alcohol and that "Guaranteed to Pass" crap AND Seafoam and nothing helped, still failed emissions. He also squeezed the PCV hose and the HC's went down pretty low so I'm not sure wats up with that... And he says i have a miss but says that probably not whats causing the HC's. Oh well. Any ideas?
Posted 26 August 2005 - 09:47 AM
Posted 26 August 2005 - 09:56 AM
Hehe ya i could pinch it.. or can I just disconnect the pcv hose for the test?
Posted 26 August 2005 - 10:34 AM
Get a new mechanic; lean does not equate to high HC's. Also, if one cylinder is mis-firing all that unburned fuel goes out the exhaust as unburned HC's. Interesting that squeezing off the PCV gets the HC's lower.
And he says i have a miss but says that probably not whats causing the HC's. Oh well. Any ideas?
Posted 26 August 2005 - 10:47 AM
Posted 26 August 2005 - 07:31 PM
yeah HC is unburned fuel. High HC + High CO would indicate a rich mixture, high HC w/ normal or low CO would indicate a lean mixture. High 02 would confirm this. You could have a plug that's not quite firing at low RPM, or something to that effect that's causing it to misfire at idle, maybe not enough to detect but enough for it to not pass smog. We just covered emissions in class, our AllData software doesn't even HAVE the data for California, it says that since it changes so often it's best to call CARB lol
See, it's not too late for an old dog to learn new things.
Actually high HC does mean lean mixture, I've read that a few times on this forum and the emissions testing place gave me a print out of possible causes and that was one of them.
Posted 07 September 2005 - 01:25 PM
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