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NO PPM failed at 15 mph on smog check. There are no codes or check engine light. What cold be wrong ?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 17 Answers

SOURCE: i did not pass smog

Well, if you didn't pass a state inspection, I can tell you how you may be able to work around it. Depending on state laws for car inspections.....I'll just give you an example: My fiance's car didn't pass inspection, but as long as she paid AT LEAST $200 to try and fix the problem, they HAVE to give her an inspection sticker for the year. We are in NC. Find out the law in your state, if you can't figure out the problem and need an inspection, spend the minimum trying to fix for now.....you'll have a year to figure it out.

Posted on Apr 29, 2009

  • 35 Answers

SOURCE: volvo 850 wagon failed NOx emissions test - badly!

Hey Pitloops!
It seems likely that one or both of your o2 sensors are acting up, or that your engine is sucking in unaccounted air from a leaking vacuum tube. Spray the tubes with "start gas" while the engine is idleing. If you hear it revving up when you spray the gas on the tubes you'll know there's a leak.
I'll sacrifice a squirrel for you and hope that the problem isn't your o2 sensors since they can be expensive to replace. Fcpgroton.com is probably the cheapest part supplier online if you'll need new sensors.
You might also want to clean your throttle body, as it usually gunks up with carbon deposits and sludge over the years. It only costs you the price of the carb cleaner to do it and the car will probably run better afterwards even if it doesn't solve the problem.
Good luck!

Posted on Jun 27, 2009

  • 834 Answers

SOURCE: failed smog check

How well does the vehicle run?

Assuming that the engine did pass the EGR function test on the emission test results, and the MIL (Malfunction Indicator Light) or check engine light is not on when the engine is running, and if you are not sure when the last time it was that the engine had a complete tune-up, with distributor cap, ignition rotor, spark plugs, spark plug wires, air and fuel filters, then a complete tune-up would certainly help, and if the engine oil and oil filter have not been changed in a while, then they should also be changed before an emission test because long used engine oil traps carbon and it will show up as higher CO on the emission test because the emission analyzer will be able detect the higher CO from the engine oil through the PCV valve.

However, it would seem from those HC readings that there is a vacuum leak, and carefully inspect all of the vacuum lines for any cracks or damage, (especially the vacuum line to the fuel pressure regulator) because cracks in the vacuum lines seem to like to hide underneath the lines.

The emission label under the hood should have the vacuum line routing diagram printed on it, and the vacuum lines should all be checked to be certain that they are all connected correctly.

Here is the firing order diagram for that vehicle to help assist you tune-up the vehicle.


e696e87.jpg

Posted on Jul 10, 2010

  • 27 Answers

SOURCE: I purchased 1990 nissan sentra it will not pass

most likely its the O,2 sensor

Posted on Jul 23, 2010

emissionwiz
  • 75197 Answers

SOURCE: my 1990 honda ex wont pass smog because the no (ppm) are to high and so is the co(%) at 15 mph what can i do to fix this

Change the oil and turn tune the engine.

Posted on Feb 08, 2012

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1 Answer

How is ignition timing regulated? Car gets 99 BTDC on ignition timing and failed SMOG Test in CA. Listed as GROSS POLLUTER.


something wrong here
with 99 degrees btdc it will not run
have you got it on the correct plug lead
next the timing is regulated by centrifugal advance if electronic or points and by the crankshaft position sensor if ECM controlled ( some after market distributors that are used in place of points units have a small sensor in the distributor that can adjust the timing according to engine rpms, but it cannot make allowances for mixture and so they can advance the timing but not take into account anything else which sometimes results in detonation under certain throttle settings
so initial setting for most cars is 10-12 degrees btdc at idle and with engine rpms set up to 3000 rms it may advance to 25-30 degrees depending on the advance mechanisms
with ECM units the timing is controlled by the crank position sensor and is set to parameters according to engine rpms and air/fuel ratio settings but it still has a basic 10-12 degrees btdc on starting
to fail smog tests you probably do not have a working cat converter and other problems besides timing

Sep 15, 2016 | Cars & Trucks

1 Answer

How do you test the EGR system on a 95 dodge Dakota with a 3.9v6 & automatic


You can test it with a vacuum pump

I would be say if new spark plugs,new air
filter,new or clean rotor & cap,synthetic oil,don't take care
of it,you will need a new converter

Don't forget the oxygen sensor may be old as well

Clean out all leaves & dirt between the condenser
& radiator & make sure it doesn't over heat

The converter may be blocked as well as worn out

Sep 27, 2014 | Dodge Dakota 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

Failed MEAS


wow, no context but i can read your mind?
ok SMOG failed. right?
what speed, there are 2 in uSA, 15 and 25.mph.
so there are 3 tests, which one. all are PPM in usa.
parts per million.
but is that HC , CO, or NOX? or ?

based on your numbers is HC
hydrocarbons or in barstool, its raw gasoline leaving rear of car.
unburned fuel..

572 ppm is way too high 12-19 is normal
id say the CAT is bad.
but can be , engine is bad, and burned out the cat.
that is why all savvy mechanics, check the that the engines
holds closed loop status, (EFI closed loop) at the speed yours failed.
if not in closed loop the cat will burn up (rich)
that is first.
Once that is cured. you check HC again. if out of spec
you did burn up the can , new cat time.

that is the correct way.

Feb 19, 2014 | 1998 Toyota Tacoma

1 Answer

My 1989 Mercedes 260E has no EGR valve and CA emission test failed NOX. What's next?


You engine came with EGR, here is a picture of it, make sure it is functional.808daddd-23be-456e-979e-50a2188da73b.jpg

Apr 10, 2013 | Cars & Trucks

1 Answer

Failed smog check


How well does the vehicle run?

Assuming that the engine did pass the EGR function test on the emission test results, and the MIL (Malfunction Indicator Light) or check engine light is not on when the engine is running, and if you are not sure when the last time it was that the engine had a complete tune-up, with distributor cap, ignition rotor, spark plugs, spark plug wires, air and fuel filters, then a complete tune-up would certainly help, and if the engine oil and oil filter have not been changed in a while, then they should also be changed before an emission test because long used engine oil traps carbon and it will show up as higher CO on the emission test because the emission analyzer will be able detect the higher CO from the engine oil through the PCV valve.

However, it would seem from those HC readings that there is a vacuum leak, and carefully inspect all of the vacuum lines for any cracks or damage, (especially the vacuum line to the fuel pressure regulator) because cracks in the vacuum lines seem to like to hide underneath the lines.

The emission label under the hood should have the vacuum line routing diagram printed on it, and the vacuum lines should all be checked to be certain that they are all connected correctly.

Here is the firing order diagram for that vehicle to help assist you tune-up the vehicle.


e696e87.jpg

Jul 09, 2010 | 1997 Honda Civic

1 Answer

Smog test fail


you need to add the codes on the vir or if the check engine light is on what codes do you have?
and always inlcude the engine size for your car
many people does question here but most of they are not ading the right information like what kind of engine and like that is hard to help

May 29, 2008 | 1999 Mitsubishi Eclipse

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