Ty
Elio Addict
I was making a point that it isn't the emissions equipment that killed mileage. That isn't the case and it was coincidental....Interesting, but we're talking different decades.
I talk the '60s and '70s while you talk the 80s and on.
I talk smog pumps since they mostly dealt with stick shift, carbureted vehicles.
extract from Wikipedia ..."Carbureted engines' exhaust raw fuel content tends to spike when the driver suddenly releases the throttle"...
Probably impacted EFI and the trend toward automatics.
I also talk catalytic converters.
They require an overly rich mixture so that they have something to catalyze.
And then catalytic converters were mandated by law.
Even is they were becoming an obsolete technology.
And I thought extra gas is the primary killer of catalytic converters.
Oh right... so did the pros.
Excess Fuel Overheating The Catalytic Converter
An engine that is performing at peak efficiency will burn all the fuel in the combustion chamber during the combustion process. An engine that is not performing properly, that is not burning all the fuel, will allow unburned or excess fuel to enter the exhaust system. When this excess or unburned fuel contacts the hot core of the converter it will ignite. This constant infusion of unburned fuel will cause temperatures to continuously rise above the designed operating temperature until the core of the catalytic converter will actually melt. Possible causes for the excess fuel entering the exhaust system are an incorrect fuel mixture, incorrect timing, corroded spark plugs, worn and cracked ignition wires, improper fuel pressure, a faulty oxygen sensor, sticking float, faulty fuel injector or a malfunctioning check valve.
The above was so obvious and I found the same information in a bunch of different places. I thought it was common knowledge. I was apparently wrong. Here's the actual source of the above.
http://bobsmuffler.com/convfail.html
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