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  #171  
Old 05-13-2012, 08:00 PM
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Inukshuk Inukshuk is offline
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I have an extra set of 93-94 downpipes. One has a small hole that would be an easy weld patch. But if you have a front O2 sensor I think your rig is newer.
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  #172  
Old 05-13-2012, 09:07 PM
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I had a neighbor that passed with flying colors and has a big hole before the cat and muffler. No check engine light on, But the holes were after the O2 sensor. Early nissan pick up that is just beat to death. He called me up to brag and we both laughed.
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  #173  
Old 05-19-2012, 09:29 AM
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no mention of the three exhaust leaks but failed on nox. gas cap too, but i was prepared for that and have a new oem cap on the seat. 02 sensors and cats are all within five years. only one cat is that old, the other is two years old (last time i had to test) and sensors are about 4 and 2 years old. less than fifty thousand miles on any one componant. cats are aftermarket magnaflows, sensors are oem. cats only show about 20 degrees difference from in to out. 377 range and 395+ range. guess it's cat time again
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  #174  
Old 06-25-2012, 06:29 PM
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Can't beat this! My 80 passed via roadside emissions this year.
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Last edited by Jacket; 06-26-2012 at 03:23 PM. Reason: spelling
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  #175  
Old 07-03-2012, 07:42 AM
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Went down on Sunday to help my dad with some stuff. His driver's side mirror was broken, so I got that replaced with one off of the 'Mud classifieds. The heater fan had also ingested some mice, so had to get that cleaned out. He also said the CEL has been on for a while, so I tried to drive it around to get it to blow the code (had just reconnected the battery). Never blew the code, but he texted me last night and said the code is P0401. He's also getting a lot of fuel tank pressure, which I think is charcoal canister-related. Oh joy.
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  #176  
Old 07-03-2012, 10:23 AM
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I've often wondered if the EGR VSV valve going bad or not functioning properly can cause the fuel vapor from the tank not to be pulled out of the charcoal canister into the intake. Then the charcoal canister becomes super saturated and we end up with problems 200k miles later. I think the 401 code is insufficent flow, meaning the valve won't open and you won't get vacuum? And by extension no vacuum to vent the CC. I'm not familiar enough with the system but maybe others can chime in?

All I know is that my fuel venting problem was reduced (not eliminated) when Robbie fixed my EGR VSV issue. I suspect I'll need to replace the CC at some point as well. Don't forget to check the passageway through the intake for clogging.
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  #177  
Old 07-03-2012, 10:52 AM
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Yep, I immediately thought the same thing. I have not done any research on how the system works though.
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  #178  
Old 07-03-2012, 10:56 AM
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Look back to post #26 in this thread..
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  #179  
Old 07-03-2012, 11:25 AM
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Quote:
Originally Posted by nakman View Post
Look back to post #26 in this thread..
Yeah I don't think that's an option because my dad just spent beaucoup $$ for new exhaust and cats that burned out because he had a CEL on. I think he'd rather get the problem fixed.
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  #180  
Old 07-03-2012, 12:11 PM
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When the VSV on the 80 went south, I didn't want to deal with it so I took the 80 to Ben

He has tricks to getting to stuff in impossible locations, like the VSV, without dismantling 1/2 of the engine. Might be worth a PM to him to learn the trick if you are planning to tackle this on your own like I imagine you are. As I recall it had to do with LONG ratchet extensions coming up from below but beyond that I was just happy with the cost and that it was fixed...
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