Question about Honda Civic

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I have a 1989 honda civic that never had smog problems till after a rebuilt head was installed. Mechanical timing is dead on, checked with timing light as well and dead on 18BTDC. Engine has new head, new air filter, oil, oil filter, o2 sensor, raditor, plugs & wires, distributer cap and runs real good but fails too high hydrocarbons? What are most common thing I should check. I really dont have a lot of money to put into this car so I would like to be able to test my parts before replacing them. Thanks Brian

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  • bjingles Jul 24, 2009

    Hey thanks for the tip but when I went out to check out somethings I found I was getting a error code of 14 which I looked up and is EACV. My Hanyes book says unplug wires and test voltage on wires coming to EACV. IT says if I have battery voltage the my ECU is bad. Well I tested it how they say with ignition on and I get 11.1.V on wires, and my battery is 11.45V. SO my questions am I getting battery voltage or is this 11.1V ok. My book does not give a voltage level just says if battery voltage then bad ecu. I think you are right about my CAT but first I have to fix this error code I did not know I had or I would have had a different question. will a bad EACV cause high HC as well

  • bjingles Jul 24, 2009

    Hey thanks for the tip but when I went out to check out somethings I found I was getting a error code of 14 which I looked up and is EACV. My Hanyes book says unplug wires and test voltage on wires coming to EACV. IT says if I have battery voltage the my ECU is bad. Well I tested it how they say with ignition on and I get 11.1.V on wires, and my battery is 11.45V. SO my questions am I getting battery voltage or is this 11.1V ok. My book does not give a voltage level just says if battery voltage then bad ecu. I think you are right about my CAT but first I have to fix this error code I did not know I had or I would have had a different question. will a bad EACV cause high HC as well

  • bjingles Jul 24, 2009

    Hey thanks for the tip but when I went out to check out somethings I found I was getting a error code of 14 which I looked up and is EACV. My Hanyes book says unplug wires and test voltage on wires coming to EACV. IT says if I have battery voltage the my ECU is bad. Well I tested it how they say with ignition on and I get 11.1.V on wires, and my battery is 11.45V. SO my questions am I getting battery voltage or is this 11.1V ok. My book does not give a voltage level just says if battery voltage then bad ecu. I think you are right about my CAT but first I have to fix this error code I did not know I had or I would have had a different question. will a bad EACV cause high HC as well

  • bjingles Jul 24, 2009

    Yes it was very helpful but I need more help and couldnt figure out how to ask additional questions. But thank you

  • bjingles Jul 24, 2009

    Yes it was very helpful but I need more help and couldnt figure out how to ask additional questions. But thank you

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HIGH HC CAN BE RELATED TO WARN OUT CATALYTIC CONVERTER(S), IN YOUR CASE AFTER ALL THAT HAS BEEN DONE THAT SOUNDS LIKE WHAT IS GOING ON, CAT CONVERTERS LAST ABOUT 100,000 MILES. I HAVE HAD A SMOG LICENSE FOR 40 YEARS SO AM PRETTY SURE OF THIS ANSWER, OTHER AREA'S OF HIGH HC ARE SLUDGED UP THROTTLE BODY AND AIR BYPASS IDLE SPEED VALVE AND DIRTY FUEL INJECTORS, ALSO CHANGING THE OIL JUST BEFORE THE INSPECTION CAN REALLY LOWER THE HC'S.

Posted on Jul 24, 2009

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