Originally Posted by woody
Hey Guys, have a look at page 2,322 and 2,323 of the Service Manual where the throttle pedal operation is described. The switch is referred to a 'kickdown simulator' but...
"The kickdown simulator is not used as a “kickdown switch”. Wide Open Throttle (WOT) recognition takes place over
the signal from the accelerator pedal position sensors pressure point, which is located in the pedal assembly. WOT
position is simulated before achieving the full load position."
The whole section is worth a read because it describes in detail the way the throttle response learning algorithm operates...
"The PCM recognizes how the accelerator pedal is being pressed and switches between a few characteristic curves.
Eighty percent of the engine’s power is achieved for a pedal travel of about 50% for an aggressive driver and about
40% for a conservative driver. There is no further difference felt above a pedal travel of about 90%.
The characteristic curve for a conservative driver is active after a long drive. Then the accelerator pedal must be
pressed down unusually hard to obtain a higher acceleration level."
Simon.
What is the deal if you mash the pedal & it doesn't kick down at all? Getting on the freeway at about 40 MPH, I floor it & it doesn't down shift. It feels like its in 4th gear & when the R's finally get up there... I feel the pull of power.
At first I thought my floor mat may have been in the way but it wasn't.
I'm going to take it in & have them look at the EGR Valve (and the warp speed button at the pedal too).