LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1983 >> Magnavan 5.7 L, 400/M40 >> Repair and Diagnosis >> Engine Performance >> System >> Pulse Air Injection System >> Trouble Shooting >> Surge Or Poor Performance

Surge Or Poor Performance

May be caused by failure of 1 or more check valves. Exhaust gas will enter carburetor through air cleaner and cause poor driveability.