Hey Was Up !
1st time posting here hoping to get some answers, so here I go Today I took my Accord 1995 to get smog check the car is in good running conditions never gave me problems. The only things it failed was ASM Emission test results the reading are
THE ONES THAT HAVE A STAR NEXT TO IT DIDNT PASS


%CO2 %O2 | HC (PPM) | CO (%) | NO (PPM)
Test rmp meas meas |max gp meas| max gp meas max gp meas
15 1609 11.8 3.6 61 275 160* 0.36 2.02 0.94* 493 1936 2509*
25 2571 14.6 0.3 37 225 27 0.35 2.00 0.01 738 1736 1203*


results
Gross polluter
fail

What can it be? everything else passed what are your suggestions

thank you for taking your time reading my post & helping

 

With all 3 being high my first instinct is it's running rich due to a bad O2 sensor or a bad fuel pressure regulator but, with a high mileage vehicle it could be any number of things. It may be you just need a tune-up. I would start by seeing if it has any codes and going from there.

How to check for codes: http://check-engine-light-codes.blog...retrieval.html

 

Seems like a misfire would cause the emissions failure, I would suspect the car does not run smoothly either. Fix the misfire the car will run much better. Fix it quickly as a misfire like that can permanently damage the catalyst.

When was the last time the car was given a tuneup and systems check?

 

well the car runs ok it has no check engine light , it had a tune up like a week ago ,oil change , spark plugs ,filter . so what other thing do I check for besides what you guy told me to check ...

 

can you edit your post so we can actually make sense of those figures

 

By no means am I a smog person.....however I would check the timing and be sure the egr ports are clean.

 

Check the exhaust manifold. It might have a crack in it.
Have you done a compression test?
New plug wires are not always in working order.
Check fuel pressure is within spec.

There is something goofy going on at idle, you have nearly 4%O2 along with nearly 1% CO. This only happens if there is a misfire.

CO and O2 are inverse of each other. Both will not be high unless no combustion is taking place.

Remove/replace a plug wire at a time until the engine is not affect by the removed wire. That then is the most likely bad cylinder.

 

OK who know how many cat burners dose the 1995 accord ex needs to have?

 

Do you mean, how many catalysts does the '95 I4 EX have?
One.
Exhaust manifold > down pipe> O2 sensor pipe > catalyst.

But don't even think of spending money on a new catalyst if you have yet to fix the previous issue. The bad running will kill the new catalyst.

 

Not an expert on smog tests, but can tell from experience.

I second MAD_Mike, also 1994/95 not necessarily through CEL if there is a misfire, check by replacing each wire, if there is any stall in the engine.

Did you replace Air Filter? Cleaned EGR Ports? What kind of Spark plugs are you running? What's the condition of the Dist cap?

 

Oh OK I'm asking cause I took it to get it check on the snog repair an the Guy told me that one of the cats were bad an there was one missing so I think he was getting confused. He old me just fix the cat an put the one that's missing an to put new spar plugs an it will be good. If he did the work I was looking at a price of 600 $ so I was like hell no lol ... so that's why I'm saking