Question about 1999 Chevrolet Astro
Did not pass smog high emission output
Your not providing any Emission Gas Numbers
High Level of WHAT?
You got 5 Gases,what's high & what are the limits
you have to stay within
If you know all that, you can google exhaust gases & read
up on the reasons & solution & print the info & put in a binder,
if you do all your own work,if not, let a shop worry about it
Posted on Mar 29, 2014
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Posted on Jan 02, 2017
ok well this might be a hard one . from what i can gather by the co reading and the o2 reading is that we are running fat. a couple things can cearte this one how many miles do we have on this mtr, two do we have a vacuumn leak? three is the vech going into closed loop? some how we need to get are hands on a scanner so we can look at a data, other wise you are going to be throwing parts at this vech , and thats not the way to fix your problem. the odds are that you may have some lazy o2 sensors you are close. have you tryed running the vech down the road before you go in for the test. the converter is like a hot water heater you have to bring it to operating temp before it will operate correctly. keep me informed
Posted on Dec 23, 2008
SOURCE: Hydro carbons in the carb are running extremely high and cannot pass the smog test. What can I do to at the very least to get it to pass the smog test? I really would like to fix it completely because
Take it out of the country and turn a huge profit selling it!
Posted on May 31, 2009
NOX is created when the internal combustion temperature gets to high.The egr system uses burnt exhaust gases to line to cylinder walls.The purpose of this is decrease internal combustion temperature therefore reducing the amount of NOX created.Would look to a possible egr malfunction usually they will trigger the check engine light but not always.The 4.3L has been known to have issues with carbon buil up in the egr and the egr pintle not open and closing properly.
Posted on Jun 07, 2010
SOURCE: failed smog test
Most modern vehicles have 2 catalytic converters, there may be one located at the exhaust manifold, or be what's called a resonator. The resonator will look almost like a cherry bomb muffler, this is a crucial part of exhaust emissions.
Posted on Jan 12, 2012
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