Question about 1987 Dodge Ram 50
Well if it has too much oxygen it would suggest incomplete burn either through too little fuel or ignition timing too far retarded.
Are you sure they are failing on the basis of too much oxygen? Normally it would be too much CO and hydrocarbons, which is generally a result of rich mixtures and/or ignition timing.. When you ****** the timing you decrease hydrocarbons, decrease Nox and increase CO. When you advance you do the opposite. When you lean the fuel you decrease CO and decrease hydrocarbons and vice versa. When you raise compression you increase Nox.
Posted on Nov 02, 2008
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