View Single Post
      11-24-2007, 03:44 PM   #95
scalbert
Major General
scalbert's Avatar
175
Rep
5,776
Posts

Drives: '13 S4, '15 Q7
Join Date: Feb 2007
Location: Woodstock, GA

iTrader: (8)

Quote:
Originally Posted by Tuned335i View Post
I guess I am having a real tough time understanding why the PROcede reading the same signal from the intake manifold sensor as the stock ECU, would read a different psi than a secondary gauge attached to the DV hoses.
Technically, the stock DME is only reading what the PROcede transmits to it. Only the PROcede truly reads the TMAP pressure signal.

I too am dumbfounded as to the discrepancy. If there is enough range with the TMAP sensor, then there must be a physical reason. I am wondering if there is a phase change in the VANOS system which could cause a reversion in the intake manifold under these specific conditions. This may not be seen outside of the manifold...
Appreciate 0