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7MGE Bogging and Power Issues - Disconnected Knock Sensor

ElectricalintermediateOP Confirmed
Problem

7MGE engine swap (110k mile motor from an 89 Supra) running poorly with bogging and weak power delivery

Engine boggingPoor power deliveryOverall rough running
Root Cause

The knock sensor located under the intake manifold was not connected after the engine swap, causing the ECU to lack detonation feedback and likely retarding timing or running poorly. Additionally, worn spark plugs and throttle adjustment contributed to the symptoms.

Confidence

Moderate confidence — Original poster confirmed this resolved the issue

View Original ThreadPosted December 2023 on SupraForums.com