FCA Approved Sell its Diesel Vehicles Again - Dodge Cummins Diesel Forum
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post #1 of 5 (permalink) Old 07-28-2017, 03:10 PM Thread Starter
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FCA Approved Sell its Diesel Vehicles Again

<center><span lang="EN-US"></span></center>


<span lang="EN-US">Fiat Chrysler Automobiles (FCA) has won approval to sell 2017 model year diesel vehicles.

The automaker has been under fire, with U.S. and California regulators alleging FCA’s older vehicles had undisclosed emissions controls, allowing the vehicles to emit excess pollution in normal driving. FCA has refuted the idea and now hopes the software fix it is using on 2017 model year vehicles can be the foundation for a fix on older 2014-2016 diesel vehicles. The company restarted production earlier this month in anticipation of approval and promises the software update will have no effect on the fuel economy ratings or vehicle performance.</span>


<span lang="EN-US">Read more about the FCA's Diesel Vehicles at AutoGuide.com.</span>

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post #2 of 5 (permalink) Old 07-30-2017, 07:44 AM
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"Software Fix"

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post #3 of 5 (permalink) Old 08-03-2017, 01:32 AM
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does anyone know when the grand Cherokee diesel will be available to order?
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post #4 of 5 (permalink) Old 09-04-2017, 09:21 PM
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Yeah... because 1970s emissions controls had absolutely zero effect on the efficiency of those engines either. And we all know that removing emissions from later model vehicles has a negative effect on fuel economy...

The only - ONLY - time I've ever seen emissions have a positive effect on anything was with a mid-90s LT4 in an F-body w/ everything in the SLP Catalog thrown at it. Literally. Drag car with a license plate (barely). Exhaust started w/ SLP long tubes. We tried dumps, lakes, dual straights, x-pipe, h-pipe, and stock route Borla collector-back system; all in straight pipe and with cherry bombs. Exhaust design behind the Y-pipe (restricted by body design) is so poor and cylinder scavenging so hampered that the car made better power (chassis dyno confirmed) through the cats. Race cats, granted, but the car needed the backpressure. Much more area under the curve.

Otherwise I've never seen anything improve efficiency of an engine except internal design (reduced parasitic losses) or airflow enhancement. Emissions controls are never "enhancing" to airflow otherwise, so they'll always limit power and thus fuel economy. I'm calling BS on making emissions programming more restrictive having zero effect on real world fuel economy. Maybe in their imaginary 40mph "highway" simulation, but not where real people live and drive.

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post #5 of 5 (permalink) Old 09-24-2017, 09:24 PM
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Quote:
Originally Posted by El Pozzinator View Post
I'm calling BS on making emissions programming more restrictive having zero effect on real world fuel economy.
Without knowing what was changed, it is not possible to be so sure. For example, what if the change was to change the algorithm they use for DEF injection. That would not affect fuel mileage or performance. It might affect DEF usage but they didn't say anything about that.

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