Whats CARS/CAGS & DFCO stand for?

[driver456]

Title says it all.OK OK Ok I'm new:D

[emarkay]

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]

Thank you.Learn something new every day.:cheers:

[1998ws6]

CARS, Computer Aided Ratio Selection, more commonly called CAGS in tuning software.