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Old Mar 4, 2003 | 10:01 PM
  #1  
BOJOFASO's Avatar
BOJOFASO
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From: NJ
emissions

hey steve 83 or anyone else
please stere me in the right direction. my bronco failed emissins for NOx . could a bad catalitic converter cause this or am i heading in the wrong direction. any help will be appreciated
thank you
 
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Old Mar 4, 2003 | 10:49 PM
  #2  
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steve83
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From: Memphis, TN
emissions

The EGR system controls NOx emissions - diagnose it.
 
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Old Mar 10, 2003 | 09:05 AM
  #3  
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irishred
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From: fort worth
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JUST TRIED TO GET MY 88' INSPECTED AND IT FAILED BOTH ...HC(PPM).. AND NOx
HC(PPM) STANDARD 155 AT HIGH SPEED I GOT 173
STANDARD 159 AT LOW SPEED I GOT 160
NOPPM) STANDARD 1508 AT HIGH SPEED I GOT 1987
 
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Old Mar 10, 2003 | 09:09 AM
  #4  
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irishred
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From: fort worth
emissions

JUST TRIED TO GET MY 88' INSPECTED AND IT FAILED BOTH ...HC(PPM).. AND NOx
HC(PPM) STANDARD 155 AT HIGH SPEED I GOT 173
STANDARD 159 AT LOW SPEED I GOT 160
NOPPM) STANDARD 1508 AT HIGH SPEED I GOT 1987
STANDARD 1624 AT HIGH SPEED I GOT 2409

WHERE DO I START???? I CHANGED THE OIL, REPLACED AIR FILTER PCV VALVE AND BREATHER FILTER PUT IN NEW PLUGS AND WIRES, RXP FUEL TREATMENT FOR EMISSIONS. WILL THIS MAYBE DO IT OR DO I NEED TO GET A DIAGNOSIS FOR THE EGR.
 
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Old Mar 10, 2003 | 03:02 PM
  #5  
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jeep8589
Mountain Pass
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From: covington
emissions

Check your timing and make sure it is not advanced. NOx is usually a result of high temps. An advanced timing increases cylinder temps dramatically. According to a car specialist in our area most HC's are from having dirty oil, so go in with fresh oil.
 
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Old Mar 11, 2003 | 12:39 AM
  #6  
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bronco351
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emissions

When I brought my 1990 Bronco (351W) in for emmissions it also failed. What I did was give it a full tune up: spark plugs, spark plug wires, adjust timing, oil, air filter, also it turned out one of my vaccum hoses was broken. I found this out by going to pep-boys and having it put on a diagnostic machine. Only 20 bucks!
 
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