Question about 1997 Dodge Caravan

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Test no pass

How fix ASM emission test HC(PPM) MAX 51-35MEAS 89-88 & NO (PPM) MAX 512-735MEAS 1136-1050

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  • butchie1 Dec 20, 2008

    i have a 1991 Cadilllac sedan deville and have FAIL 3 times .Had a new catalytic converter put on .My text HCppm was 02490 and Co% fail also at 8.45. How do i pass or what do i need to do to fix it or to get it to PASS. PLEASE HELP A>S>A>P<<<<<<<<<<<<<<<<<<<<

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Have you got all your hoses running to the emmission control box (usually a round or rectangular box on the passenger side near firewall). Is the box old and needs replaceing? If you don't want to change because is very dear to do you could change your spark plugs and fuel filters? Also change your oil with a lighter oil a 55w/10 and oil filter and your spark plug leads with new ones 8mm diamiter would be good as it is less resistance for the spark which will aid in fuel burn and air filter change is good idea to, maybe 200 dollars or so to do this but all will help reduce your emmissions if emmission box isn't working properly. Hope this helps

Posted on Jul 26, 2008

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How to fix asm emission test failure hc( ppm) max 61 gp 274 meas 690 at 15 mph, at 25 mph max 36 gp 224 meas 804


this is easy,, it can be 1 or 2 problems.

1: CAT is dead or weak, new cats can in fact hide a crappy engine.

2: bad engine. runs like junk and does not burn all its fuel.



any good shop can find this is minutes.

what I DO (no 5gas mach)

i check for (scan tool costing me $9 whole bucks) ask)

i check for closed loop status, idling

if ok then at 15mph and then 25mph , just racing motor in neutral.

if all 3 tests pass, im good.

if any fail, i fix that. bad fueling, bad spark or whatever.



if all 3 pass, its NEW CAT TIME



easy huh? a binary answer.

bad cat, bad motor. (or both)



when i say bad motor that means,every inch of the EFI/engine system.

every drop.

Dec 27, 2013 | 1994 Honda Civic

1 Answer

1985 Plymouth Voyager 2.6 L failed NOX emission test


1) please RUN the scanner and computer test from any repair shop you must get the exactly faulty in your emission system
2) However you can go to the www.automecanico.com+ www.autoelectronico.com this sites is in spanish, but you can translate with your web browser and I Higly recomend because has Powerful information update for any cars models, Try it and fix it.
God bless you

Jul 09, 2012 | 1985 Plymouth Voyager

2 Answers

My 1997 Honda Civic failed it's Emissions Test. See below the ASM Emission Test Results. What do you suggest I do to get the car to pass the smog test? ASM Emission Test Results: 15mph - RPM = 1587...


Jose, I don't know if this will give you the answer you are looking for because there are many things to consider here. The exhaust gas recirculation valve (EGR) is one of the main things involved in reducing NO emissions. This valve is controled by the power control module. (PCM) This is your vehicles computer. The PCM monitors the vehicles speed and will command the EGR to open when the vehicle attains a certain speed, which is why the ASM test being done is recorded at two different speeds. At 25 MPH your vehicle failed the hydrocarbon (HC) emissions limit and this could be for a number of reasons. When is the last time you car was tuned up? Old spark plugs, wires, clogged air filters, oxygen sensors, leaking injectors (personal experience) or the PCV valve could be contributing to the results of the test. I guess that the easiest way to go is to tune up the engine replacing the spark plugs, wires, air filter and the PCV valve and don't forget to have the oil changed at the same time. Only then should have the vehicle retested and see what the results are. Should it fail again you may have to consider having the EGR or the catalytic converter replaced depending on what portion of the test fails. If the NO fails I would consider the EGR. If the HC fails then I would consider the catalytic converter. Good luck with this.

Apr 05, 2011 | 1997 Honda Civic

1 Answer

My 1990 chevy astro van didn't pass smog. Paperwork says it failed the following; Ignition timing: 99 ATDC. Also, ASM Emission Test Results; 15mph HC (PPM) max is 122 measured 127, 25mph max is 102...


the smog test looks like the engine is miss firing, that could cause the timing to be out of whack also, try a old fashioned tune up, new spark plugs, wires, and filters also replace the PCV valve. any time you see the NO that high suspect a miss fire.

Feb 24, 2011 | Chevrolet Astro 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.


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Jul 09, 2010 | 1997 Honda Civic

1 Answer

1991 Honda Accord LX failed EVAP test. The ASM Emission Test Results showed Test 25mph RPM 1933, %C02 MEAS 14.60, %02 MEAS 0.22, HC (PPM) MAX 61, GP 236, MEAS 19, CO (%) MAX 0.60, GP 2.10, MEAS 0.02, NO...


Things to consider or replace...

If you are getting a Check engine Light let me know, it will make things easier to diagnose.

Catalytic Converter
Oxygen Sensor
EGR Valve

May 17, 2010 | 1991 Honda Accord

1 Answer

MY CADILLAC DEVILLE 1997 DONT PASS SMOG IT FAILED THE HC (PPM) THE MAX WAS 47 THE AVE WAS 9 ND THE MEAS WAS 140 AT 15MPH AND AT 25MPH THE MAX WAS 31 AND THE AVE WAS 7 AND THE MEAS WAS 127.. CAN YOU TELL ME...


i'd start with a complete tune up. plugs, wires, pcv valve, gas and air filter. what engine code are you getting? normally vehicles 1996 and newer get a obd (computer) emissions test not an asm (tail pipe) test. and perhaps a new catylitic converter and oxygen sensors

Apr 17, 2010 | 1997 Cadillac DeVille

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

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