RB25DE NEO with Haltech ECU

[Haggerty]

Well as expected the ECU wasn't getting proper manifold pressure reading.  Once I switched to a 3rd vacuum line directly off the back of the manifold the car runs amazing.  Still slightly lean on full throttle but only like 15 AFR, probably fixable with some tuning.

[Duncan]

Great to hear!

[GTSBoy]

At least it's only NA and therefore less likely to have pinged itself to death.

[MBS206]

6 hours ago, Haggerty said:

Well as expected the ECU wasn't getting proper manifold pressure reading.  Once I switched to a 3rd vacuum line directly off the back of the manifold the car runs amazing.  Still slightly lean on full throttle but only like 15 AFR, probably fixable with some tuning.

Make sure you drop the GTT base tune back in, and set your injectors again, this will remove anything playing up with it you may have removed.

Possibly lean there as it's normally a fast transient going THROUGH atmospheric pressure, and a turbo motor would then quickly go richer as boost builds.

The only worry you MIGHT have is ignition timing, as the DE is higher compression than the DET from memory. But again, you're not in boost, so the DE motor will be a lot more forgiving at atmospheric.

 

Get Murray, Kinkstahs, and Johnny's input on tuning haltechs, those guys have played with tuning enough in the past to be able to help now you're past the trouble shooting stage of the MAP issue