My chevy s10 failed emissions

92 camry failed smog because running rich. Why? - Toyota Nation ...

www.toyotanation.com/.../411132-92-camry-failed-smog-because-runni...

Apr 26, 2012 - 15 posts - ‎9 authors
off ignition timing, and the car was running to rich. the timing i will get fixed tomorrow but the rich .... Our 93 camry le with 4 cly engine failed agin a few weeks ago, both our toyotas always fail.. they are .... 1991 Toyota MR2 V6 91 MR2 N/A Rough Idle, Running Rich, No Accelleration
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Toyota Camry running rich Questions & Answers - Fixya

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... running rich I have a 1991 Camry that is running rich. I just replaced the O2 sensor and a new cat, oil change, new spark plugs. The car wont pass smog. it is ...

1992 Toyota Camry XLE V6 Excessive Running Rich ...

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1992 Toyota Camry XLE V6 Excessive Running Rich ... 1997Toyota Camry V6 forward Oxygen (O2) Sensors .

Check for spark at plugs, if you have spark, spray carb cleaner into throttle body to see if she will crank up.

It is NOT a failed Throttle Body

FORGET the 2100 ford codes

The problem is bad cop ignition coils

Change the spark plugs
Change any failed coils or all of them
Change the Front Oxygen Sensors at 100,000 miles
Clean MAF Sensor

Clean throttle body --- CRC- throttle body cleaner-instructions
on back of can

In a very very very rare case the TACM Motor may fail
on the throttle body & you have one of the also rare vehicles
that you can actually buy a new motor for, without getting a
$600 throttle body
Those motors Dorman has & Amazon I believe for $75.00

NO reason at all that YOU can not do ALL that work yourself

Part are avail from Rock Auto.Com

PO171- System too lean (Bank1)

Most likely a failed oxygen sensor on the passenger side,
if you never changed the front or upstream sensors at 100,000
miles, as preventative maintenance

Do both sides,clear codes & if they come back, check for vacuum leaks

Do spark plugs every 3 years, as well as fuel & air filter

Spray throttle body inlet with CRC Throttle Body Cleaner

Spray MAF Sensor with CRC MAF Cleaner

Check Fuel Pressure a rail port with a gauge (38# to 42# )

mccartlidge. are you serious?? high HC is the result of a headgasket problem??? do everyone a favor and dont give advice when you clearly dont know a damned thing about emissions. as far as solutions to your high HC output, someone else mentioned the possibility of a worn out cat along with carb problems and or a simple air fuel adjustment. this car if i remember correctly has a feedback carb which means it has an oxygen sensor and a mixture control solenoid on the car to fine tune the air fuel mixture. it is not uncommon to have a oxygen sensor not functioning at all or out of normal calibrated range. easy test for oxygen sensor(single wire oxygen sensor ) is to hook up a voltmeter at 0 to 1 volt range(positive lead to oxygen sensor wire, negative lead to any good ground source) and watch the voltage. a perfectly working system the signal should look like a wave constantly rising and falling from .9v-.1v. test at 2500 rpm as well as at idle on a hot engine.if the oxygen sensor doesnt rise and fall, add fuel(spray small amount of carb spray) into carb while at idle or high rpm and the oxyen sensor should go full rich(approx .8-1v) that is point 8(.8v) not eight volts. you will usually see a reading of .9v . if the oxygen sensor doesnt put out a rich reading than its no good. on the other end you can remove a vacuum line(brake booster hose, half way removed as to not stall the engine) the oxygen sensor should go lean which means around .1 volts. if the oxygen sensor does not respond correctly replace it. beyond that, the engine first and foremost has to run on all cylinders to run clean and efficient. if it has a missfire or dead hole that will cause high HC along with high CO as unburnt fuel is going out the tail pipe. i could go on and on about possibilities but figured i would give you a couple basics to go on. Good luck.

Hi.

High emission are often consequence of engine problems. In that case the new cat converter or exhaust and new oxygen sensors will not help.

High emission from engine occurs because of many different reasons, main causes are:

Electronic injection problems:

Do an OBDII scan to find out if there are error codes. If there are no codes check injectors sensors in the air intake (MAF and IAC), check vacuum for leaks. Clean throttle body. Check EGR, IAC, PCV systems.

Engine internal problems:

Do a compression test to find problems associated with engine faults (eg.piston rings, head gasket, valves).

Also make sure that spark plug, fuel and air filter have been replaced. Make sure that there is no misfire or distribution problem.

Regards.

Ginko

check the spark plug gaps and make sure their set to 25th ,do this first then if still not starting then look at the autochoke ,this is an old vehicle and so it should have a sensor that turns the autochoke on like a temperature sensor in the head for the gauge but iam not familar with this american vehicle to be able to tell you sorry

Your engine is still running rich, inspect all your vacuum lines and your fuel pressure regulator. A bad fuel pressure regulator can cause your engine to run rich and is there any check engine light on???
Thank you for suing Fixya and keep me posted, be glad to help you get your car running 100% again soon

may need a new catalitic converter. Especially if you have had some noticeable sluggishness from the engine

You could have a dirty EGR valve, you can re move it from the manifold and clean it with Throttle body cleaner. Might as well buy two cans, since your cleaning the EGR, might as well clean out the throttle body too.
Spray the throttle body cleaner in to the throttle body with the engine running and try to keep it at 1000 rpm and then to 1500 rpm as you clean out the throttle body and let it idle down for 2 min then turn the engine off. Then turn the engine to the run position for 10 seconds and start and let idle, ro for a test drive and hope that solved the problem, if not there a few more things we can do which will consist for tune up.
Note: Clean the EGR first so you don't burn your self since the engine would still be cool before you clean the Throttle body.
Good luck and keep me posted.