Rod35hall

Understood, but still trying to figure out why the car runs fine when the MAP sensor vacuum hose is disconnected and stalls when the vacuum hose is connected.

It has not been tuned. It’s the start up map with slight modifications to fuel and ignition tables to stabilize the idle.

Hi all, I searched the forums and didn’t find anything related to my issue. I recently installed my G4+ in my R32 GTR and I’m having issues with idle when the MAP sensor is connected to a vacuum source. Without the vacuum source it idles somewhat fine, but when i connect the vacuum source to the MAP sensor, it idles rough then dies. I’m getting my vacuum from the same line that was feeding the stock boost pressure solenoid. Any help would be appreciated. NOTES: I’ve disconnected the MAFs, I’m running correct base map that was supplied with ECU.