1992 Ford F150 bad nox

1992 FORD F-150
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MCREB
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  • 1 POST
Engine Mechanical problem
1992 Ford F150 6 cyl Two Wheel Drive Automatic

what would cause high Nox when all vacum lines are in new condition and the egr valve workin properlly. everything else passed with real low numbers on the state inspection in texas
Feb 1, 2010 at 1:56 AM
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DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
High NoX is assicitaed with EGR low flow. Valve maybe opening but passage ways could be cloged with carbon
Feb 1, 2010 at 6:51 AM
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