Question about 1995 Oldsmobile Aurora

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Failed smog my car failed smog inspection it failed the part were it said emmissions they said the numbers were to high

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Means that the hc,co2,nox, emissions are too high, you will need the numbers in ppm on the read out to begin diagnossis

Posted on May 08, 2010

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Failed emissions hc high


First I recommend changing spark plugs, air filter, and change the oil & filter. If these are dirty or fouled up it will kill your millage and help to fail smog.
You can reduce both NOX and CO emmissions by adding denatured alcohol to the gas tank. Run it down to a bit under 1/4 tank and add 1 1/2 gallons. It makes the engine run a bit rough, but really clean.
If you still fgail SMOG then you need a new catalytic converter.
I used to "trick" my 86' with alcohol, but just rebuilt the engine so I put a new Cat on it. It passed emissions with WELL BELLOW numbers.

Good luck.

Aug 08, 2014 | 1991 Toyota Pickup

1 Answer

Runs rich


How can you fail more than once?

After you fail, you go to a repair shop &
resolve ALL Vehicle issues

Then the shop road tests until all 8 I/M Monitors
run clear ,or there is no reason to go back to inspection
knowing your going to fail.

The problem is the shops & peoples inability to explain
what they need taken care of.

If you never work on the vehicle for years,then you don't
go to inspection,it is a given you will fail

Spark Plugs-every 3 years
Check for Cylinder Misfires
Always install a New Air Filter before inspection
Always install new fresh full sys oil before inspection

Oxygen Senors get replaced every 100,000 miles

Have to road test with professional scan tool & look at
all data,check monitors,fuel trim,O2 etc & check for codes

You have to spend the money to evaluate the vehicle, to see
if it is ready to go for inspection,not many are,their just driven
& neglected

Rich could be-- O2 Sensors,Dirty MAF Sensor,Vacuum Leaks,
Injector Leaks & more,I have seen a dirty air filter fail a car

Mar 27, 2014 | Acura Integra Cars & Trucks

1 Answer

NO ppm CA. smog at 15mph too high


NOX is high coolant or engine temps
& egr issues

Lots on the internet to study on exhaust gases
& the reason they fail inspection or are too hi

Mar 26, 2014 | 1995 Dodge Dakota

1 Answer

Building emissions history to pass smog test


if you are failing emmissions test your evaporator canister is expired replace it and then you and your car will get a green light

Dec 31, 2011 | 2000 Ford Escort

1 Answer

Have a2005 deville with the code po741 cant pass ca. smog need to what dose it takes to fix this problem


Hi,

Code P0741 = Torque Converter Clutch Circuit Performance or Stuck Off. This relates to your transmission only and has nothing to do with Exhaust emmissions.

If failed smog test, there must be an issue within your emmission system, e.g. sensors etc

You will need to have your codes read again, or have your vehicle properly inspected.


Cheers,

Jun 14, 2011 | Cadillac DeVille Cars & Trucks

3 Answers

My 7.3 diesel did not pass smog because of code p1396 what does this mean?...


P1396 Glow plug monitor fault, bank #2 One or more glow plugs failed or circuit fault

You either have one or more bad glow plugs, a disconnected harness under the valve cover, or you have a problem with the glow plug module. This code is only for californial emmissions trucks, which are the only ones with glow plug modules.

Apr 28, 2011 | 1999 Ford F250 Regular Cab

1 Answer

Problems getting car smoged. the engine light keeps going on and off.


mcdevito75 here, BEST BET let your local shop run a scan on your cars computer, 1 or more sensors that control engine emmissions may be bad, if so you"d never pass smog inspection. Sorry.

Jun 03, 2010 | 2004 Chevrolet Malibu

3 Answers

Failed emmissions test number 1 its supposed 58 i had 128 what should i do


clean all engine breathers, engine flush, then change oil and oil filter. this should help dramaticly

Mar 09, 2010 | 1991 Chevrolet Camaro

1 Answer

1987 nissan 300zx failed emmissions too much co I


change oil and filter put a emission cleaner in fuel

Jul 11, 2009 | 1989 Nissan 300ZX

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