Catalytic converter or O2 sensor??
09-08-2010, 06:08 PM
#1
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Location: rialto, ca, united states
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Catalytic converter or O2 sensor??
i previously failed smog in california(who doesnt)..car is a 1992 honda civic dx...the smog tech said it could be the O2 sensor or something else here is my question...
there was improvement between my 15 mph test and 25mph test... here are the numbers for both. also i put fuel system cleaner in about 20 miles before i went to get smoged on an empty tank then filled it up just in-case that would make any of these numbers jump that much just an fyi..
15mph (1640rpm)
HC (PPM) Measured/Max allowed 226/92 (failed).... CO (%) Measured/Max allowed 0.65/0.55 (failed).... NO (PPM) Measured/Max allowed 716/2862 (failed)
25mph (1778rpm)
HC (PPM) Measured/Max allowed 129/57 (failed)... CO (%) Measured/Max allowed 0.18/0.38 (Passed)... NO (PPM) Measured/Max allowed 442/764 (Passed)
what could this be? the reason im asking is because Cats are expensive as hell for california so i want to make sure thats pretty much it before i go that route...
Thank you for your time.
there was improvement between my 15 mph test and 25mph test... here are the numbers for both. also i put fuel system cleaner in about 20 miles before i went to get smoged on an empty tank then filled it up just in-case that would make any of these numbers jump that much just an fyi..
15mph (1640rpm)
HC (PPM) Measured/Max allowed 226/92 (failed).... CO (%) Measured/Max allowed 0.65/0.55 (failed).... NO (PPM) Measured/Max allowed 716/2862 (failed)
25mph (1778rpm)
HC (PPM) Measured/Max allowed 129/57 (failed)... CO (%) Measured/Max allowed 0.18/0.38 (Passed)... NO (PPM) Measured/Max allowed 442/764 (Passed)
what could this be? the reason im asking is because Cats are expensive as hell for california so i want to make sure thats pretty much it before i go that route...
Thank you for your time.
09-08-2010, 06:22 PM
#2
Re: Catalytic converter or O2 sensor??
Why did NO fail at 15mph? You are below the maximum.
I don't think the cat is bad because NO is low.
Things to check first:
--CEL codes
--Plugs, wires, cap, rotor, ignition timing
--Stuck open thermostat (engine running cold)
--Exhaust system leak in header or near O2 sensor
I don't think the cat is bad because NO is low.
Things to check first:
--CEL codes
--Plugs, wires, cap, rotor, ignition timing
--Stuck open thermostat (engine running cold)
--Exhaust system leak in header or near O2 sensor
09-08-2010, 06:27 PM
#3
Vietnamese!
Re: Catalytic converter or O2 sensor??
Why did NO fail at 15mph? You are below the maximum.
I don't think the cat is bad because NO is low.
Things to check first:
--CEL codes
--Plugs, wires, cap, rotor, ignition timing
--Stuck open thermostat (engine running cold)
--Exhaust system leak in header or near O2 sensor
I don't think the cat is bad because NO is low.
Things to check first:
--CEL codes
--Plugs, wires, cap, rotor, ignition timing
--Stuck open thermostat (engine running cold)
--Exhaust system leak in header or near O2 sensor
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