Question about Toyota Corolla

2 Answers

My car wont pass the hc ppm and co% what is the most common cause of this problem?

Posted by on

  • 2 more comments 
  • kemp_jay Jul 29, 2008

    it's a 1989 5 speed

  • kemp_jay Jul 29, 2008

    thanks here is what has been done

    oil changed

    carborator cleaner used

    new o2 sensor new air filter

    and the only repairs since it passed last new clutch and timing belt

  • kemp_jay Jul 29, 2008

    you got it thanks. p.s the brake lights also don't work bulb changed and fuse anysuggestions?

  • Anonymous Mar 16, 2014

    hc co high o2 ppm test

×

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,486 Answers

Just add a good injector cleaner.Then get the engine at normal running temp before.Be sure you have a clean air filter fitted.Then that should be fine.

Posted on Sep 01, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Toyota Master
  • 61,249 Answers

This indicates a rich mixture, it can be caused by any number of things.
1. Dirty engine oil
2. Sludge in throttle body and idle air bypass valve
3. Defective catalytic converter
4. Possiable defective fuel injection parts such as dirty fuel injectors, worn out O2 sensors, defective MAF sensor.
As you can see there is no easy answer, I was a smog tech for over 30 years, I saw every kind of part cause your issue, even a defective engine cooling fan.

Posted on Jul 29, 2008

  • yadayada
    yadayada Jul 29, 2008

    I have no idea what the mileage is on the truck, you may have a tired cat converter, also make sure the timing is set to spec, to much advance can cause it to fail smog. also how far is it out from a "pass" is it a gross polluter?? If it is just shy of a pass, then a new cat will most likely cure the issue, but before you do that clean the injectors to make sure they spray a mist and not dribble fuel into the cylinder which will cause it to run rich, Let me know what happens.

×

2 Suggested Answers

  • 1 Answer

SOURCE: ASM 2525 NO ppm TAILPIPE EMISSIONS failure

I have a 94 Tbird with a reading of 790 NO ppm at 1871 RPM, I put about a liter of water into the intake at about 2000 RPM and changed vacum lines to EGR valve,(may have been cracked), now the reading is only 214 NOppm at 1348 RPM. This much change I don't understand. Maybe this info may help someone.

Posted on Sep 17, 2009

fastboyz
  • 674 Answers

SOURCE: ASM 2525 NO ppm TAILPIPE EMISSIONS failure

have you had the the engine codes pulled and reset?
and if so what are your engine codes?
i dont know of any car that will pass emissions test with the engine light on.
we cure your trouble that caused your engine light to come on and you will pass your test.
later
paul

Posted on Nov 24, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I'm dealing with a 77 e-250 window van w/460.has a edelbrock 4bbl,no cat,has no egr,should it have one.can't get to pas emmisions.CO% PASS,CO2% PASS,RPM PASS,HC PPM FAIL


check and if it was made with a cat converter , fit one
if it should have an egr unit fit one
tune the carby properly

Aug 10, 2016 | Cars & Trucks

1 Answer

Reason for failing emmision hc ppm idle on a 1996 chevy suburban 454 truck


Hi!

First of all, HC (Hydrocarbon) are the residue of petroleum based product combustion. If your HC reading are higher than the OBD2 legal limit (220 ppm), the most common causes could be a leaking fuel injector, abnormal oil consumption, a faulty Oxygen sensor or worn out spark plug / distributor cap / spark plug wire. To be honest, I would need more accurate details such as NOx ppm, CO ppm, CO2 ppm and Oxygen ppm and if there is any repair that have been made on the car recently to give a proper diagnostic.

Warm regards

Mar 16, 2015 | 1999 Chevrolet Suburban

1 Answer

Failed hc ppm& feul evap test


If I read your post right, you are over on Hc and that is all? Check the air filter, check the injectors. You are either not getting enough air or are getting too much fuel.

Apr 02, 2014 | 1993 Saturn SL

1 Answer

Just Failed my emission test......hc ppm reading 485 allowed 189 also CO% 10.50 ALLOWED 2.36 WHAT CAN I DO TO CORRECT.


sounds like a bad catalytic converter, just did my 1985 Jeep could not get it to pass ended up replacing the catalytic converter, muffler, ox sensor and EGR valve then Jeep passed with flying colors.
if your cat is bad it reduces your exhaust flow causing loss of power and increases fuel consumption.

Apr 30, 2012 | 1997 GMC Jimmy

1 Answer

High CO and HC 1992 Toyota Camry


hi i have a toyota camry 1992 and it didn't pass emissions its reading 1048 no ppm rpm and it will allow 910

Apr 01, 2012 | Toyota Camry Cars & Trucks

2 Answers

Need 92 toyota paseo to pass CA smog test ! What causes too high HC in smog test????


High HC means moisture in the system. Try driving it longer then take it to the smog shop. Otherwise it could be hard like a head gasket or easy such as a PCV not functioning. Any ways you should always drive it about 20 miles before smog check, longer when the weather is cold.

Nov 30, 2010 | Toyota Paseo Cars & Trucks

1 Answer

My HC (PPM) WAS HIGH AND THE NO (PPM) WAS HIGH WHAT IS CAUSING THIS? SO I DID NOT PASS SMOG THANK YOU


An old worn out engine will have high emmisions due to burning oil. Also, with age, a catalitic converter won't burn up any fuel vapors causing high emmisions.

Sep 11, 2010 | Isuzu Rodeo Cars & Trucks

1 Answer

FAILED EMISSIONS


possible but could be head gasket or valves , or worn rings and is by passing the pistons going straight out the end ...or maby settings are wrong ? try carb cleaner and inspect visually air-filter etc.

Aug 26, 2009 | 1986 Ford Mustang

3 Answers

ASM 2525 NO ppm TAILPIPE EMISSIONS failure


have you had the the engine codes pulled and reset?
and if so what are your engine codes?
i dont know of any car that will pass emissions test with the engine light on.
we cure your trouble that caused your engine light to come on and you will pass your test.
later
paul

Nov 24, 2008 | 2002 Toyota Sienna

1 Answer

Emissions level HC (PPM) too high in truck. How to fix?


Do an oil change with 20W50 oil (or one grade higher) to prevent blow by during the test.

You current oil has HC from blow by though the rings.

Do a fresh oil change will lower the HC.

========
Change spark plugs,wires,cap and rotor if they are over 24,000 miles
========

Make the smog check appointment for the EARLY MORNING. Colder air will help the fuel burn better.

========

Clean or change the air filter and pcv valve.

Clean Mass Air Flow sensor with CRC Mass Air flow cleaner or electronic part cleaner.

========

Do a quick wipe down on the wires and cap to take the moisture off.

========

Check spark plug wire contacts for corrosion.

========

Fill the tank to around 3/4.......just in case your fuel pump is weak.

========

Ran the truck for 20+ minutes on highway before the test.

========

Do not carry excessive cargo on the truck bed.


These are the little things I would do to get the HC and CO down.


Please post more information on the comment window.

Jul 16, 2008 | 1990 Ford F250

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

249 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

61249 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...