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Old 04-05-2003, 12:33   #1 (permalink)
mb1326
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Texas Emissions failure/need help please

i have a 94 3.0L that has just failed the NOX (ppm) low speed emissions test.

standard = 1046
reading = 2463

i pass high speed

can anyone help explain what might be causing this?

thanks
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Old 04-06-2003, 00:36   #2 (permalink)
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bad cats, bad o2 sensors. Enriched system? bad egr can cause some of this as well.


Just a few things. Yeah I know about it since that was some of the issues brought up when my impala did the same thing.
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Old 04-06-2003, 07:56   #3 (permalink)
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The most common problem is the EGR, Ford saw fit to put a weak system on their vehicle's. Next up as the man said is the "CAT" Have you been getting worse milage lately? This is a good sign
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Old 04-06-2003, 10:00   #4 (permalink)
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thanks, it give me a place to start!!!
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