Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
I-TEC Control System: Description
The I-TEC control system constantly monitors and controls engine operation. Various input sensors supply information to an Electronic Control Unit (ECU), and Turbocharger Control Unit (TCU) (if equipped). The ECU then controls the fuel delivery, ignition timing, fuel pressure, fuel evaporative purge, exhaust air injection and turbocharger (if equipped).
The ECU input sensors consists of the crank angle sensor, throttle position sensor (automatic transmission), throttle valve switch (manual transmission), vehicle speed sensor, coolant temperature sensor, airflow sensor, oxygen sensor and knock sensor on Impulse models.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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