|
...deceleration under load is BAD, BAD, BAD for hydrocarbon (HC) pollution, so taking the mechanical throttle "back-off" control away from the driver and giving that control to the computer is *how* most engines "meet" the EPA emissions control.
...you can 'lift' your foot off the accelerator pedal, but the computer will control the A/F ratio smoothy by adjusting air and fuel without creating the HIGH manifold vacuum condition that makes gasoline engines "back-down" like a diesel and in doing so, put raw & unburnt HC's out the tailpipe.
Last edited by gone-ot; 03-20-2010 at 12:18 AM..
|