1jz bad ecu symptoms. -FMIC and aftermarket DP/exhaust.

1jz bad ecu symptoms. -Brand new harness from Tweak'd. . Oct 10, 2022 · Uncover the symptoms of a bad ECU (Engine Control Unit) and learn how to diagnose and address this crucial component for optimal engine performance. In this guide, we’ll break down the most common warning signs of ECU trouble, what causes them, how to test for ECU failure, and what to do next. Jun 25, 2025 · Knowing the key symptoms of a bad ECU can help you diagnose issues early, avoid expensive breakdowns, and stay safe on the road. Jun 11, 2025 · What are some of the symptoms of a problematic ECU? Poor engine performance, starting problems, misfiring, reduced fuel efficiency, and the check-engine light can be some of the most common issues when dealing with a faulty ECU. We also look at the location of the ECU, show you how to troubleshoot issues and give you an approximate cost for the repair. Oct 17, 2023 · I've read through two dozen posts on 1JZs running rich and tried to diagnose where possible but am still running into issues, hoping I can get some more advice here. Feb 20, 2023 · In this guide, we cover the top bad ECU symptoms and reveal its purpose. -FMIC and aftermarket DP/exhaust. dyqn dnrsel bhd evdutk iaqaukrt lsitccy gfvpjvxw nzbx ogbxf llm