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| High NOx Smog Failure (Defeat or Bust) (Page 8/9) |
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Notorio
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APR 10, 11:38 PM
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| quote | Originally posted by sanderson231:
Like I said earlier, if the EGR soleboid is leaking air and can't be fixed just put a solenoid valve on the vent line so that it is blocked when the ECM is trying to open the EGR valve.
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This sounds like the ultimate fix to me, however, it won't fly with CA Smog visual inspection, at least, it is a risk that it would be spotted if not properly camouflaged. My plan for my particular car is to remove the cap, that is, 21 business days from now when my registration arrives. 
KIT, way to go! Congratulations on passing with flying colors!! 
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Notorio
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APR 17, 05:29 PM
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Patrick
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APR 17, 07:07 PM
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| quote | Originally posted by Notorio:
And here's my trip to a local winery just to prove I can go somewhere other than DMV or the Smog Test Station.
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Careful now, or you might end up bussing it for awhile. 
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Kitskaboodle
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APR 22, 05:27 PM
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Deja Vu Notorio…..
My Ca. plate is also Oct. 2023. 😀
Oh, and I’m a little envious of that color.
There’s a similar but lighter yellow color I want to paint my 85 GT.
On another note, PLEASE report back on engine driveability issues if you choose to leave the input side plugged. The only difference is that you have a manual and both my Fiero’s are autos.
Kit
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Notorio
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APR 22, 11:52 PM
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| quote | Originally posted by Kitskaboodle:
Deja Vu Notorio…..
My Ca. plate is also Oct. 2023. 😀 ...
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Our cars are in synch. Hopefully they will pass again in Oct 2024!
| quote | Originally posted by Kitskaboodle:
Oh, and I’m a little envious of that color.
There’s a similar but lighter yellow color I want to paint my 85 GT ...
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I really like that Yellow too but I wish I knew what Yellow it is! Several possibilities have been suggested to me and I've bought the test paint for 4 or 5 different Yellows but so far, no dice. It went to a paint shop once and asked if they would tell me what color it was and they wouldn't help me. It's a shame because I'd like to do some touch up until I can afford repainting. (A clutch, struts, shocks, and tires are ahead of Paint on the list.)
| quote | Originally posted by Kitskaboodle:
On another note, PLEASE report back on engine driveability issues if you choose to leave the input side plugged. The only difference is that you have a manual and both my Fiero’s are autos ...
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Too late, I already removed it. Perhaps YOU can make the report instead??
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Kitskaboodle
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APR 23, 07:00 PM
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Ok, I will.
I plan on leaving mine plugged as long as my engine runs good.
I still need to do a shakedown test. I will try to do that tomorrow.
Stay tuned…….Kit
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reinhart
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APR 24, 08:33 AM
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Interesting results here. One trick I've learned is if your car is passing everything but the NOX (usually almost always will pass HC with a new cat unless you got a major problem), just have them test the car cold. Drive it down, shut it off and tell them to leave the car off until it's ready to test (They'll always want to let the car idle in the bay like they're doing you a favor and helping you pass). It might reduce HCs but since that's never a problem with me, all they're doing is raising my NOX levels.
This strategy has worked for me countless times after having the same NOX issue as the OP and going through all of the troubleshooting and testing vacuum at idle and various RPMs. Remember, NOX is just produced from extremely high combustion temps. A cold engine won't see high enough temps to trigger NOX failure IME.
The seal off of the inlet is a new one but since I've already got a working system (See above), I'll probably stick with that until I get a failure with my method.
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Kitskaboodle
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APR 30, 06:19 PM
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As promised, I did a mild “shake down test” today. Since this is the first real drive since I got it smogged, I didn’t want to drive it a long distance from home just in case the engine started behaving badly. (since I still have the intake port tube of the egr solenoid plugged)
Anyways, the run was mostly freeway cruising, about 65 most of the time. I drove approximately 35-40 miles total, which included a detour off highway 280 to go up into the hills. (Sand Hill Road up to Old La Honda Road and back on Alpine Road) Weather was about 68 degrees most of the trip. As an fyi I did not drive the car hard during this trip. (I drove like a “normal” person) 😀
I’m summary, the car drove absolutely fine. No idling issues at stoplights, no acceleration or hesitation issues, no overheating, nothing.
Granted, it might have been a more “telling” summary if it were 80-90 degrees out (and I drove with a lead foot) but that will have to come later during the summer.
Comments? Kit[This message has been edited by Kitskaboodle (edited 04-30-2023).]
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Kitskaboodle
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APR 30, 06:26 PM
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As promised, I did a mild “shake down test” today. Since this is the first real drive since I got it smogged, I didn’t want to drive it a long distance from home just in case the engine started behaving badly. (since I still have the intake port tube of the egr solenoid plugged)
Anyways, the run was mostly freeway cruising, about 65 most of the time. I drove approximately 35-40 miles total, which included a detour off highway 280 to go up into the hills. (Sand Hill Road up to Old La Honda Road and back on Alpine Road) Weather was about 68 degrees most of the trip. As an fyi I did not drive the car hard during this trip. (I drove like a “normal” person) 😀
I’m summary, the car drove absolutely fine. No idling issues at stoplight, no acceleration or hesitation, no overheating, nothing.
Granted, it might have been a more “telling” summary if it were 80-90 degrees out but that will have to come later during the summer.
Comments? Kit
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Notorio
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MAY 02, 11:41 PM
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| quote | Originally posted by reinhart:
...
This strategy has worked for me countless times after having the same NOX issue as the OP and going through all of the troubleshooting and testing vacuum at idle and various RPMs. Remember, NOX is just produced from extremely high combustion temps. A cold engine won't see high enough temps to trigger NOX failure IME.
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This is good to keep in our back pockets for Next Time. This makes me wonder if running a lower temp thermostat would also help?? 
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I put the sticker on the plate and turned the key, with visions of spritely driving dancing in my head, then, click, click. The battery was now 'dead as a doornail.' 
Fast forward to Monday and after a trip to O'Reilly's Auto to get a new battery ($$$), as was FINALLY able to hit the road (legally) and drive my baby. 
