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Smog Check Hell 200 1984

posted by Dick Slessig on Mon Oct 6 18:23 CST 2014
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last visit: Wed Oct 22 15:14 CST 2014

[RELATED]

Long story short: took my '84 245 in to get smogged without having performed comprehensive tune up. I had just cleaned the flame trap and put in a new air filter.

It failed on low rpm HC, high and low NO : 3117 PPM @ 15 mph, 2937 PPM @ 25 mph.

I put in new plugs, wires, cap, rotor, O2 sensor, fuel filter (unchanged in 10 years - shame!), fuel pressure sensor and a new catalytic converter.

HC went from 143 to 12 PPM, 15 mph NO went down to 263 PPM, but 25 mph NO actually measured higher - 3112 PPM.

Technician suggested that it's running lean at the higher rpm- maybe something w/ the AMM. I also read on one of the threads on this topic about the possibility of an exhaust leak throwing the O2 sensor off.

Confession: I have not done a proper fuel pressure test.

Any tips are gratefully welcome.

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Smog Check Hell [200][1984]
posted by Dick Slessig on Mon Oct 6 18:23 CST 2014 >

Smog Check Hell [200][1984]
posted by Trev29 on Tue Oct 7 05:05 CST 2014 > V
- Seafoam/Water Torture [200][1984]
  posted by 1908242DLa on Tue Oct 7 08:19 CST 2014 > V
  - Seafoam/Water Torture [200][1984]
    posted by Dick Slessig on Tue Oct 7 09:33 CST 2014 > V
    - Seafoam/Water Torture [200][1984]
      posted by Volvodad subscriber on Wed Oct 8 19:53 CST 2014 > V
- Smog Check Hell [200][1984]
  posted by Dick Slessig on Tue Oct 7 09:34 CST 2014 > V
  - Smog Check Hell [200][1984]
    posted by oldyellr on Tue Oct 7 09:47 CST 2014 > V
    - Smog Check Hell [200][1984]
      posted by Dick Slessig on Tue Oct 7 19:09 CST 2014 > V
      - Smog Check Hell [200][1984]
        posted by oldyellr on Wed Oct 8 07:36 CST 2014 > V
        
        Smog Check Hell [200][1984]
        posted by Dick Slessig on Wed Oct 8 08:14 CST 2014 > V
        
        Smog Check Hell [200][1984]
        posted by oldyellr on Wed Oct 8 09:12 CST 2014 > V
    - Smog Check Hell [200][1984]
      posted by Trev29 on Wed Oct 8 05:39 CST 2014 > V
    - Smog Check Hell [200][1984]
      posted by someone claiming to be oldduke on Wed Oct 8 06:29 CST 2014 > V
      - Smog Check Hell [200][1984]
        posted by oldyellr on Wed Oct 8 07:40 CST 2014 > V
        
        Smog Check Hell [200][1984]
        posted by Onkel Udo II subscriber on Wed Oct 8 08:59 CST 2014 > V
        
        Smog Check Hell [200][1984]
        posted by oldyellr on Wed Oct 8 09:39 CST 2014 > V
        
        Smog Check Hell [200][1984]
        posted by Onkel Udo II subscriber on Fri Oct 10 06:38 CST 2014 > V
      - Smog Check Hell [200][1984]
        posted by oldyellr on Wed Oct 8 07:43 CST 2014 > V

Have You Adjusted The AMM Yet? [200][1984]
posted by Tatra Mike on Wed Oct 8 06:34 CST 2014 > V
- Have You Adjusted The AMM Yet? [200][1984]
  posted by Dick Slessig on Wed Oct 8 08:11 CST 2014 > V
  - Cause Of Lean Mixture [200][1984]
    posted by Tatra Mike on Wed Oct 8 15:31 CST 2014 > V
    - Cause Of Lean Mixture [200][1984]
      posted by Dick Slessig on Thu Oct 9 08:37 CST 2014 > V
    - Washington State doesn't test 240's? [200][1984]
      posted by Ken C subscriber on Thu Oct 9 10:53 CST 2014 > V
      - Ah...Nevermind [200][1984]
        posted by Tatra Mike on Thu Oct 9 20:04 CST 2014 > V
        
        Aah, that's what I thought ... [200][1984]
        posted by Ken C subscriber on Thu Oct 9 22:54 CST 2014 > V
      - Washington State doesn't test 240's? [200][1984]
        posted by someone claiming to be CB on Fri Oct 10 17:57 CST 2014 > V

Smog Check Hell [200][1984]
posted by Dick Slessig on Mon Oct 13 13:24 CST 2014 > V
- Smog Check Hell [200][1984]
  posted by Trev29 on Tue Oct 14 05:31 CST 2014 > V
  - Smog Check Hell [200][1984]
    posted by Dick Slessig on Tue Oct 14 09:14 CST 2014 > V
    - Smog Check Hell [200][1984]
      posted by Onkel Udo II subscriber on Tue Oct 14 09:47 CST 2014 > V
      - Smog Check Hell [200][1984]
        posted by Dick Slessig on Tue Oct 14 19:50 CST 2014 > V
        
        Smog Check Hell [200][1984]
        posted by machine man subscriber on Tue Oct 14 20:38 CST 2014 > V
        
        Smog Check Hell [200][1984]
        posted by someone claiming to be CB on Wed Oct 15 15:39 CST 2014 > V
        
        Smog Check Hell [200][1984]
        posted by Dick Slessig on Wed Oct 15 20:24 CST 2014 > V
        
        Here's one from the attic... [200][1984]
        posted by lucid subscriber on Thu Oct 16 07:15 CST 2014 > V
        
        Here's one from the attic... [200][1984]
        posted by Dick Slessig on Thu Oct 16 09:07 CST 2014 > V
        
        Here's one from the attic, including copy of 2002 post re NOx and Volvo Chrysler system [200][1984]
        posted by lucid subscriber on Thu Oct 16 10:07 CST 2014 > V
        
        So is the suggestion ... [200][1984]
        posted by Trev29 on Fri Oct 17 06:04 CST 2014 > V
        
        So is the suggestion ... [200][1984]
        posted by lucid subscriber on Fri Oct 17 06:35 CST 2014 > V
        
        So is the suggestion ... [200][1984]
        posted by someone claiming to be CB on Fri Oct 17 16:03 CST 2014 > V
        
        So is the suggestion ... [200][1984]
        posted by Dick Slessig on Sat Oct 18 11:33 CST 2014 > V

Luckier here in North Texas... [200][1984]
posted by It Rolls on Tue Oct 14 22:18 CST 2014 > V

Smog Check Hell [200][1984]
posted by kvetoslav on Sun Oct 19 17:46 CST 2014 > V
- Smog Check Hell [200][1984]
  posted by Dick Slessig on Mon Oct 20 19:09 CST 2014 > V

Smog Check Hell [200][1984]
posted by Dick Slessig on Fri Oct 31 23:09 CST 2014 > V
- Smog Check Hell [200][1984]
  posted by Onkel Udo II subscriber on Sat Nov 1 03:48 CST 2014 > V
  - Smog Check Hell [200][1984]
    posted by someone claiming to be oldduke on Sat Nov 1 07:38 CST 2014 > V

Air Mass Meters of Dubious Quality [200][1984]
posted by John McPhail on Sun Nov 2 09:34 CST 2014 > V

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Smog Check Hell 200 1984