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Home >> Chevrolet >> 1981 >> Chevette Scooter, Automatic Trans, Trans Mfr CD 200C/MV9 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Pulse Air Injection Reactor >> Testing >> Functional Test
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Functional Test

Connect a hand vacuum pump or other vacuum source to rubber hose end of pulse air valve. With 15 in. Hg vacuum, there will be an allowable drop to 5 in. Hg vacuum in 2 seconds. If vacuum drops in less than 2 seconds, replace valve and/or hose.

Fig 1: Pulse Air Valve Mounting Location Shown (Chevette Illustrated; Others Similar)
G09317911Courtesy of GENERAL MOTORS COMPANY
NOTE: Also see General Motors Computer Command Control in this section.
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