Increasing EGR flow: gasoline engine

[mwebb]

Originally Posted by arcosine

Have you noticed any improvment in mileage? I wonder if taking it before the converter would recycle some of the unburnt hyrocarbons.

maybe or maybe not
the benefit of cooler temperature inert gas post cat may offset the teeny amount of CO and not so much HC that may be present pre cat with much higher exhaust gas temperature

you would need to test the percentage of EGR flow under both conditions as opposed to when misfire begins to see

[Teemo]

Originally Posted by arcosine

Have you noticed any improvment in mileage? I wonder if taking it before the converter would recycle some of the unburnt hyrocarbons.

Too early to make any claims about exact improvement in mileage.

[arcosine]

Originally Posted by mwebb

maybe or maybe not
the benefit of cooler temperature inert gas post cat may offset the teeny amount of CO and not so much HC that may be present pre cat with much higher exhaust gas temperature

you would need to test the percentage of EGR flow under both conditions as opposed to when misfire begins to see

Maybe hot gas would improve burn near misfire limit.