Emissions Tricks?

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01-27-2004, 11:49 AM

#11

mazdaspeed7

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Location: Savannah, Ga

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Quote:

Originally Posted by gazellis' date='Jan 27 2004, 01:27 PM

We have been over my car with a fine toothed comb after the rebuild and it would not pass in Texas.

I had to take the Bonez Hi flow cats off and put stock cats on then it passed. We checked everything thoroughly and can't figure why it won't pass. It comes up for inspection again in March and I don't know what I am going to do then.

I have all the emissions crap still on the car. Air pump, ACV, EGR Valve, Good TPS. ECU shows no problems. All the solenoids are in working order. No vacuum leaks.

The only thing I can think of now is maybe it is just an O2 sensor going bad. Is there a way to test the O2 sensor? Maybe with a volt or ohm meter?

Just replace it. Bosch Universal sensors are around $28, you just have to splice it into the factory wire. I cut the plug off the stock sensor, and spliced that to the O2 sensor. It beats the hell out of $150 for the same sensor with the plug already on it.

01-27-2004, 11:58 AM

#12

gazellis

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Join Date: Feb 2003

Location: Fort Worth, Texas

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I had read that the Bosch do not work correctly. Maybe that was from a Mazda salesman

Your's works fine I suppose....

01-27-2004, 01:45 PM

#13

Turbomark7

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Join Date: Nov 2002

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anhydrous alcohol (gas dryer) binds to the water and splits it and that reaction yields methanol and whatever the starting alcohol was, usually ethanol or isopropanol.

01-27-2004, 01:48 PM

#14

mazdaspeed7

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My bosch sensor has worked just fine. Actually, its due for replacement now.

01-27-2004, 01:55 PM

#15

j9fd3s

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Join Date: May 2002

Location: California

Posts: 22,465

ntk 02 sensors are usually available, and its the factory part. usually about $20.

have you checked your acv? if its not working car not pass smog. if its not working theres 2 vacuum hoses in the front of the intake by the tb that get swapped.

possibility number 3 is that the bonez cat is bad, have you looked in it?