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.
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HOMESERVICE MANUALSMAZDA20113 MAZDASPEED, 2.3 3REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1 (ENGINE CONTROLS - SYSTEM & COMPONENT TESTING)FUEL SYSTEMFUEL CONTROLFUEL CUT CONTROL SYSTEM - MIATA
2011 Mazda 3 Mazdaspeed, 2.3 3
Fuel Cut Control System - Miata
2011 Mazda 3 Mazdaspeed, 2.3 3SECTION Fuel Cut Control System - Miata
WARNING: This page is about a different car, the 2001 Mazda Protege, 2001 Mazda Millenia, 2001 Mazda MX-5 Miata, 2001 Mazda MPV, and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
- To check system operation, connect New Generation Star (49 T088 0A0) scan tool to DLC-2. DLC-2 is located under left side of instrument panel, behind fuse block cover. Ensure engine is at normal operating temperature. Allow engine to idle. Turn A/C switch off.
- Using scan tool, access DIAGNOSTIC DATA LINK menu, and select PCM. Highlight and select PID/DATA MONITOR AND RECORD. Select RPM and INJ. Scan tool will measure and display fuel injector pulse width. Increase engine speed to 2500 RPM, then quickly close throttle valve.
- Fuel injection pulse width should be zero milliseconds until engine speeds drops below 1000 RPM, then pulse width should be 2-5 milliseconds. If pulse width is as specified, Fuel cutoff system is functioning properly.
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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.