1JZ-GTE VVTi Swap Won't Start/Idle - Haltech Base Map Setup

Electricaladvanced✓ OP Confirmed

Problem

1JZ-GTE VVTi swapped Supra with Haltech ECU would not start or idle properly. Owner was struggling with base settings and could not get the engine running correctly.

Engine not starting or running correctlyPoor or no idleIncorrect Haltech ECU base settings

Root Cause

The Haltech standalone ECU did not have a proper base map configured for the 1JZ-GTE VVTi engine swap, and the owner was unfamiliar with the required settings.

Confidence

Low confidence — Original poster confirmed this resolved the issue

View Original Thread →Posted March 2026 on SupraForums.com