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1984 Isuzu Truck smog

Tiny
JBACON
  • MEMBER
  • 1984 ISUZU TRUCK
Engine Mechanical problem
1984 Isuzu Truck 4 cyl Two Wheel Drive Manual

my pu passes all but the 15 mph no witch are 300 to high what are the possible causes
Friday, September 4th, 2009 AT 5:00 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
What gases did it flunked? HC/CO/CO2/O2/NOX?
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Friday, September 4th, 2009 AT 5:08 PM
Tiny
JBACON
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It failed on the no(ppm) at 15 mph and passed all outhers
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Saturday, September 5th, 2009 AT 2:23 PM
Tiny
RASMATAZ
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Nox -check and clean out the EGR valve might not be opening.
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Sunday, September 6th, 2009 AT 2:27 PM

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