Question about 1992 Mitsubishi Montero
Posted by Anonymous on
Run the fault codes to determine which exhaust sensor is faulty
check the cat converter is working
Posted on Apr 09, 2015
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Posted on Jan 02, 2017
get oxygen sensor checked,maybe get tune up see if engine is leaning off properly,could be air flow sensor,but needs sensors to be checked
Posted on Oct 30, 2009
NOX is produced when cylinder temperatures exceed 2500 f.
Your vehicle has 2 ways to directly reduce NOX, EGR system, and catalytic converter, and also the cooling system indirectly.
Take a look at the EGR system, vacuum lines, pipes, and make sure the diaphragm moves. Disconnect the vacuum line, then push on the diaphragm and plug the hole (from vacuum line) when you release the diaphragm there should be vacuum. Also you may want to take it out and give the EGR passages and EGR valve a good cleaning, with some type of carbon cleaner like carb cleaner.
Posted on Mar 10, 2010
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
Replace the catalytic converter with dealer part aftermarket such as carquest or napa are only designed to last about two years!and make sure egr system functioning properly also.
Posted on Dec 24, 2011
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