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 MANUALSCHEVROLET1987STEP VAN P20, 7.4 W, AUTOMATIC, 400/M40REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 34 (A/C-HEATER SYSTEM - MANUAL)COMPONENTS & FUNCTIONSWIDE-OPEN THROTTLE CUT-OUT SWITCH
1987 Chevrolet Step Van P20, 7.4 W, Automatic, 400/M40
Wide-Open Throttle Cut-Out Switch
1987 Chevrolet Step Van P20, 7.4 W, Automatic, 400/M40SECTION Wide-Open Throttle Cut-Out Switch
WARNING: This page does not describe the selected car, but rather 38 other vehicles, including the 1987 Pontiac Sunbird, 1987 Pontiac Safari, 1987 Pontiac Grand Prix, 1987 Pontiac Grand Am, and 1987 Pontiac Firebird. However, it is still accessible from the selected car via links, so may be relevant.
Wide-open throttle cut-out switch, located on the carburetor or accelerator pedal bracket, is used to improve acceleration by stopping compressor operation under full load.
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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.