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Pontiac
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1987
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Grand Prix Base, 3.8 A
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Repair and Diagnosis
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Engine Performance
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System
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Air Injection System
Air Injection System
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Description
Operation
Air Pump
Deceleration Valve
Diverter Valve
Check Valve
Electric Air Control Valve
Electric Air Switching Valve
Electric Divert/Electric Air Switching Valve (EDES)
Pressure Operated Electric Air Control/Electric Air Switching Valve (PEDES)
Component Testing
Notes
Check Valve
Air Pump
Deceleration Valve
Trouble Shooting
Exhaust Backfire
Poor Gas Mileage
Excessive Exhaust Emissions