Stepping on the gas merely (sp?) opens the throttle plate and advances the throttle position sensor. Only thing I can think of is that stepping on the gas allows more air into the chamber. You arent the only one to experience this as both my 88' 4x4 and 87' 4Runner with late style intake both do similar.

~Darin <img src="/forums/images/graemlins/baby.gif" alt="" />

88' 4x4 *22R-EB Gen II*
87' $Runner *22R-EB Gen I*
85' Sillyca 22R-Esq

"I LIVE IN MY OWN WORLD...THEY KNOW ME WELL THERE"