1993 Honda Prelude "failed smog hc test" Questions

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...failed smog 2X is now a gross polluter ? clutch, smog parts the upstream o2 sensor, fuel pressure regulator, a fuel filter, air filter all new Also a compression test failed smog 2x now a GP my VIR ...

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Question about Honda Prelude

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smog test at 15mph 112 HC on the 25 mph 43 HC you may need replace the catalytic converter, but 1st do this, clean the throttle body and idle airbypass valve, change the oil before the retest as well,

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failed smog hc too high the truck failed a smog in california with hc levels at 146, 126 was acceptable. It passed at 15 mph, failed at higher rpm test. what do I do to start? About the only thing you

Question about Honda Prelude

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...smog 2 years ago barely passed the low idle HC, this year it failed the low and barely passed the 25mph test? I can attach actual readinsif that will help? Hydrocarbons (HCs) are unburned fuel. You ...

failed smog for high hc levels st idle . what should i do before i take it back to try and smog? ive already done complete tune up. as long as you have no check engine light on change oil, air filter.

Question about Cars & Trucks

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...smog test I have the truck test it 2 times, the first I pass emission but I fail oxigen sensors. On the second test I pass everything but I fail the emission test, the HC and NO readings are to high. ...

failed CA smog test (badly) just bought it from auction for $400, took it to get smogged and failed Gross Polluter levels: 15mph test HC 436ppm, CO 1.46% (specs are 127ppm, 0.78%) 25mph test HC 320ppm

...smog test I failed my CA smog twice now, I rebuilt the TBI mid last year, when I went in to have the smog test done my HC was 216 - 15mph and 219 - 25mph the max allowed is 92-15mph and 68-25mph, CO% ...

Question about Honda Prelude

1 Answer

...smog Did you do a full tune up? Do a compression test and check for any cyclinder that is low in PSI. Look of wet plug and oil coated plug(s). == Which item CO,NOx,Hc is failing? You may need to ...

Failed Smog Test Close to CA-HC Limits I took my Honda 92 Accord LX in for a smog test yesterday and ended up failing because of the Ignition Timing. I have since had that sorted out. However of ...

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