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View Full Version : Whats CARS/CAGS & DFCO stand for?



driver456
April 7th, 2006, 11:48 PM
Title says it all.OK OK Ok I'm new:D

emarkay
April 8th, 2006, 12:36 AM
CAGS is Computer Aided Gear Selection - a US mandated thing on Manual Tranny cars to shift 1st to 4th, to save fuel and clear the air by eliminating "unnecessary" RPM's at low engine load. I think CARS is the same thing for the exported cars (in Australia)

DFCO Deceleration Fuel Cut Off - when no throttle is asked and the engine is idling, at speed, and the vacuum is high, the PCM shuts off fuel to injectors. Again a fuel and emissions tool.

(Interesting factiod: The 1957 Rochester FI units for Chevrolet and Pontiac tried this, for fuel savings only, but since this was a mechanical system, they could not get it to work quick enough for some instances. Therefore teh whole DFCO system was removed as a Technical Service Bulletin for all dealers to perform on the few early FI cars sold that year...)

driver456
April 8th, 2006, 03:51 AM
Thank you.Learn something new every day.:cheers:

1998ws6
April 10th, 2006, 02:13 AM
CARS, Computer Aided Ratio Selection, more commonly called CAGS in tuning software.