At 11:34 PM 3/3/01 -0600, you wrote:
>when i depress the gas pedal fully it doesnt accelerate as fast as when i
>ease off the gas a bit say 3/4 throttle it has no change in rpm or sound but
>you can actually feel that it goes quicker if you ease back on it. several
>people said they can feel the same thing on their truck one person said he
>thought it had something to do with the puter richening the mixture to much
>to help with cooling and poss. retarding timing. any info helps
>thanks arnold 2000 qc 4.7 auto
It is generally true that, as engine load increases, that timing is retarded
and mixture is richen, as a safety precaution in the WOT maps but
you would still be running faster over a period of time with the throttle wide
open than at 75% throttle.
One thirdhand bit of info. that I picked up which might explain this phenomenum
is that, in the newer transmissions, the lockup clutch in the torque
convertor is
modulated so it has controlled slippage (instead of the normal
engaged/disengaged).
Bob
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:59:56 EDT