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Home >> Jaguar >> 1978 >> XJ-S >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel Injection - LUCAS Electronic Fuel Injection >> Testing >> Manifold Pressure Control Valve

Manifold Pressure Control Valve

Unplug pressure control valve connector. Use an ohmmeter to check resistance between terminals No. 7 and 15. Resistance should be 85-95 ohms. Check resistance between terminals No. 8 and 10. Resistance should be 346-354 ohms. Check resistance between all terminals and ground. Resistance should be infinity. If readings are incorrect, replace manifold pressure control valve. See Figure.