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MAP sensor operation by Lenny
1995 454 MOTOR HOME. MANIFOLD VACUUM IS 22Hg. WHEN MAP SENSOR IS CONNECTED ENGINE DIES. MANUALLY APPLY VACUUM TO MAP AND RUNS GREAT UP TO 17Hg ON HAND PUMP. AFTER 17 ENGINE QUITS. ANY TAKERS?? MAP, o2, IAC, EGR TPS ALL CHECK OUT. SOME QUESTION ON FUEL PRESSURE BEING LOW AT 15-18 PSI. OEM PUMP, PULSATOR AND PRESS REGULATOR