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Old Mar 29, 2004 | 04:28 PM
  #1  
trk98's Avatar
trk98
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failed inspection

my 1989 4.9 failed the nox emission test can anyone tell me the solution to this?

thanx in advance
 
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Old Mar 29, 2004 | 07:16 PM
  #2  
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hoxiii
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From: Pittsburgh
running lean can do it, excessive carbon build up in the cylinder can do it, a bad thermostat can do it, a bad EGR will do it, improper timing, anything making it run hot, basically.


Justin
 
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Old Apr 4, 2004 | 07:01 AM
  #3  
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ridgerider3
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Give this a shot.

Don't take this as the only or best option {may not even work, you know that "Murphy" Lives!}, But, what I have done in the past is get the tank down to below 1/4 tank {the closer to mt the better}, and then add 3 or 4 bottles of "HEET". This is Methanol! Be careful! That should help you "pass", but you will still have the problem. Should let you get the paper work done, and then tackle the problem without empting the wallet to fast. WORD OF WARNIG THOUGH, AS SOON AS POSSIABLE, fill the tank, the pistons might need a new home if you run that mixture for to long! I live in Delaware, and I have had luck with this trick there.
 
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