failed Emissions

[roadboy]

just did my pretest emissions, had a feeling i wouldent pass so i tried.
these are canadian standards.
idle passed all
rpm 2525
LIMIT RESULT
HC PPM:54 213
CO %: 0.30 0.68
NOx PPM:595 3362

yup, failed miserable

i passed last year new cat everything. but i remember i blew my turbo after i did my emissions
also just got my engine rebult/new turbo/head and it only has 1500miles on it.
how can i fix all these? new cat? o2 sensor? plugs? wires?

3"exhaust, catco cat, stock turbo, new fpr

any input appreciated Thanks.

 

[mkiiichip]

Do you have any exhaust leaks? if you do the following wont work.
Take all of the readings (what you have listed above plus CO2, and O2.) for each speed. and plug them into a lambda calculator.
http://www.smogsite.com/calculators.html#lambda
Then youll know exactly what your dealing with for (ie lean, rich or stoich)

Why the NOX is so high is going to be the issue. HC and CO will come into check when the Nox issue is resolved.

 

[supraguy@aol]

Wondering if your egr is working.
Sometimes the pressure reference line gets completely blocked with crapola.
Happened to me. Test it per the tsrm.

 

[Poodles]

EGR appears to not be working, also you have a MINES ECU...

 

[Dirgle]

.............also you have a MINES ECU...

This. The Mine's ECU is programed off of a JDM ECU, which has no provisions for EGR operation. Your EGR isn't functioning because the ECU doesn't know it's there.

 

[mkiiichip]

NOX should not be that high at 2500 rpm without any load, even with an inop EGR. The EGR is only going to open slightly at the beginning of the free rev. As the motor is held at 2500 the egr will shut again. The EGR is used to lower NOx under cruse loads. Which this test does not cover.
It looks like a cyl is running lean, or cam or ignition timing.

 

[jetjock]

^ The fact he's being tested for NOx indicates a loaded mode protocol was used. I believe Ontario's Drive Clean Program (which Toronto falls under) employs ASM. Course, I could be wrong...

 

[TRDownShift]

Just move to texas.... cars 24 years or older dont have to take this test lol YAY my 87 will be safe by the end of this year!!! WOOT WOOT!!!

 

[mkiiichip]

^ The fact he's being tested for NOx indicates a loaded mode protocol was used. I believe Ontario's Drive Clean Program (which Toronto falls under) employs ASM. Course, I could be wrong...

Damn, well that would change everything. But then why are the readings RPM based and not speed or load based?
Definitely a bit of info that is needed.

 

[supraguy@aol]

The cars have to be within a certain rpm range during the test, i beleive.
What I've done before(and successfully), is to hook the vac reference line to the egr valve directly to the vac source off the throttle body, and bypass the vsv, thus providing some egr activity at all rpms. It actually runs pretty smoothly this was for the test purposes.

 

[KMinAF]

I had difficulty getting mine to pass also. Started with the basics and was embarassed to find a burned spark plug wire and timing that was set at 15 instead of 10deg. Also replaced some questionable vac lines then retested and passed. Mine failed due to high HC though.

 

[roadboy]

so the test is put the car on the dyno and actually run it in third or fourth and you have to be at certain rpm range. i dont have a egr and i have a jdm ecu, i dont mind putting back the egr if its going to make me pass

 

[Dirgle]

The primary purpose of the EGR valve is the reduction of NOx. So if your going to pass an emissions test that has a low NOx requirement you will need the EGR system. But for the EGR to function you will need the EGR valve, cooler, VSV, and USDM ECU.

 

[mkiiichip]

Since the car goes on the dyno, sorry about the misinformation. I agree EGR issue.

 

[Nick M]

just did my pretest emissions, had a feeling i wouldent pass so i tried.
these are canadian standards.
idle passed all
rpm 2525
LIMIT RESULT
HC PPM:54 213
CO %: 0.30 0.68
NOx PPM:595 3362

yup, failed miserable

Did they provide you with an oxygen reading and carbon dioxide reading? There isn't necessarily a standard, but it gives us more information, especially about the cat itself.