Code 31 using VPC???

[SevenMKIII]

VPC converts the afm to speed density, removing the afm as stated for years. Am I supposed to put a resistor or something in the afm because I just fired my car up last week finally and its storing code 31=afm.

[drjonez]

sounds like the VPC pooped out or there is something wrong w/the wiring. code 31 = the ECU not seeing an AFM input....or in this case, the output from the VPC.

[SevenMKIII]

It still roughly adjusts the fuel, would it just completely not work without that signal? Its hard to tell what it's doing because my idle is horrible right now.

-Chris

[Bondango]

sounds like the VPC pooped out or there is something wrong w/the wiring. code 31 = the ECU not seeing an AFM input....or in this case, the output from the VPC.


If your hardwired, check you have the Resistor in the right location, and also the Gray wire from the VPS going to the KS pin on the ECU

http://supras-ireland.net/manuals/vpc%20intsall%20diag.jpg

Marty