the NO ppm is way over limit is supposed to be 331 it read 726 at 1276 rpm,.
HC ppm limit is 46 it read 5
CO% limit is 0.25% it read 0.03%

the curb idle test was good,.
CO% limit is 1.00 it read 0.02
HC ppm limit at idle is 200 it read 5

So any emissions guru
s wanna tell me why before this car has a tragic fuel rail fire to match the fire on the sides,.

Nick

Nick, just for clarification, everything is good EXCEPT the NOX? And only at 1200RPM?

change the thermostat 205 degree, the engine is not running at peak temp, and fails emissions. or you could move in with northern classics no emissions up there

You might clean and check the EGR just for insurance. High NO usually means bad EGR.

Bill

X2 on the EGR valve for NOx gasses, Nick. That was the problem with my brother's car.

Your vacuum leak repair will help, but more with HC... which you don't need help with.

IIRC, hot temps actually make NOx gasses read higher. Always a balancing act with emissions. Temp too low and you get HC and CO problems, too hot and the NOx can creep up on you.

Good luck. I "moved" to a county here that doesn't do testing. There's been talk for years in Ohio that the OBD-1 testing (95 and older) would be eliminated since the car needs to be put on a treadmill, etc. No such luck as of yet.

keep us posted on the re-test, Nick. My 94 passed NOx by one point on the "second chance" run. All my other numbers are low like yours. I believe it is the EGR, so I look forward to your results.

X3 on a possible EGR issue. Most EGR systems are activated above 1000 rpm and in gear. Most of the time its just a leaking vac line or gunk stuck on the valve itself. High combustion temps will cause high NOx readings. I run a 195 T'stat in my 94 and had no problem with emissions. I've only had to replace the EGR valve itself once in about 30 years.
They stopped doing the treadmill emissions for my 94 and now only test 96+ with OBD2 here in Mass. Rumor was a couple of vehicles "took off". The inspector would run the engines up to 3000 RPM. In the past two of my vehicles lost traction on the drum which caused the rear to walk. My station would clear out the area in front of the inspection bay when doing the test. Now they do a visual for the emission components on the ones they can't plug in.
regards
rikard

you're all right,. and you're all alright with me too,.
the egr was seized,. replaced it,.
will see tomorrow what happens,.


Nick

Thanks Nick. Where and how much for the EGR?

Put away the party hats,. cancell the band,. car failed again,. the nox is better but still too high,.
went from 726 on a 331 limit to 527,.with the newer egr,. (i have some low mile used ones jay,.)
Guy did say the car is way too lean tho,. will clean the maf,.find a pressure gauge for the fuel rail,.
i bought a cute little adapter for my cable so i can use my laptop,. i,m going to datalog the car with datamaster,. and see what comes up,.
AAAAARGH as i mentioned ? the town of dundalk is closer to the emissions testing place than we are,. and they don't need a test,. AAAARGH!!


Nick
car runs so nice its a crying fucking shame, its not good enough for the government,. that have tightened emissions regs by 11% per year for the last 5 yrs,. car would have passed fine 5 yrs ago,. (where's the crying smilie,.??)

Nick:

Have you determined if the EGR solinoid is functioning? Could be the EGR was siezed because of lack of use. If the solinoid is kaput, then the EGR doesn't open.

Easy to test:

Hook up vacuum source to input of solinoid (drivers side valve cover just ahead of egr valve). Connect pin A to 12V and pin B to ground. EGR should now open. If not, then solinoid is dead. Also check to see if you are getting vacuum from intake. This plugs up on occasion.


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Still sounds like the EGR is not opening. If everything else is within spec. then don't give up on the EGR.

Bill

I always thought that high NOX was plugged cats. A stuck EGR would have thrown a PO1441 code and CEL.

Use an inverter, and take the whole PC with you. I know that sounds crazy, but the effort will be worth it.

After dealing with my cable issues, I found that USB/serial adapters are not reliable...

Don't even have to run the engine. Just give the solinoid a supply of vacuum and a couple of jumper wires to activate the unit. Even sucking on a length of hose is enough to open the EGR. Again, check the vacuum coming out of the intake manifold. Have seen this plugged a couple of times, usually with a carbon crud, probably oil residue from the PCV. Had to use a drilll bit to clear the Caddy.

Bill

i ntook it to my local garage for my rape testing fee,. but mechanic got pissy and said there's 4 egr's for this motor,. well yes,. but 2 are for camaro's,. and 1 is for manual trans,. so that leaves one,.
well i removed the egr and showed him its the exact same on,. but the owner of the shop has informed me the shop will always be too busy now to work on it,.
SO,......
brought it home,
vacuum added,. motor shut off, egr opens all the way, and will hold for better than the minumum 20secs,.
Motor running,. vacuum added,. egr opens part way only,. too much exhaust back pressure?
open manually with something while motor is running and motor will stall,.
Nick
by the time i get this sorted it'll be time to put the bastard car away,.not to mention the 10 temp tag has expired,.
all this adding to my wisdom tooth absess, my inflamed bowel, and C A S taking me to court to make my 15 yr old a ward of the court,.
aaargh.

WTF do they care what EGR is on it? My place doesn't even open the hood or look underneath. As long as it passes, there could be a steam engine in there. Put the probe in, and follow the damn prompts on the computer.

One more thing. See if you can get them to do a "two-speed idle test". I get this one for the SS, becuase I tell them it is too low for the rollers. It passes with zeros across the board. This is a standard request, and they shouldn't argue. The car doesn't get put on the rollers - it just revs in park. The SS also gets the "hot rod" category (their term) because of the T56 swap.

a drive to ottawa i guess,. cos the wagon is really low,. but its been on the rollers ok,.
i have my suspicions that the old guy is doing something wrong,.

the roady wagon does the same thing egr wise,. idling i can hook up live vacuum,.and it runs slower and a little rougher but the egr doesn't open wide,. shut it off and apply vacuum and it opens wide,.
i have to go get a vacuum gauge i guess,. faakk i,m sickof this fucking black albatross,. ever since it got thoise damn flames the cars been a slut,.i still have to align it properly yet, AND fix the damn trans lockup,..
aaargh

Nick