View Single Post
Old 05-21-2013, 11:39 PM   #75 (permalink)
t vago
MPGuino Supporter
 
t vago's Avatar
 
Join Date: Oct 2010
Location: Hungary
Posts: 1,807

iNXS - '10 Opel Zafira 111 Anniversary

Suzi - '02 Suzuki Swift GL
Thanks: 829
Thanked 708 Times in 456 Posts
Quote:
Originally Posted by mechman600 View Post
Simply create a manifold vacuum leak to the air box. That way the throttle angle will always be less at a given load than it normally would be and the transmission won't kick down as soon.
As Christ said, it'd have to be trial and error with a valve. I'd likely see P0121 and P0221 codes if I caused too large of a vacuum leak. The engine computer compares throttle sensor positions against manifold air pressure sensor readings, and the throttle itself is one of them drive-by-wire types (not like in the Dakota, where I could spoof the throttle position as needed).
  Reply With Quote