Checking Cold Start Valve - Porsche 928 Workshop Manual

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Air Flow Controlled Fuel Injection
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CilECKlUG AIIXILIARY AIR REGULATOR CHECKING COLD S.rART "ALVE
1. Connect ohmmeter to both connection of auxiliary
1. Check power supply of cold start valve. Pull
air regulam
and measure
resistance.
off plug for this purpose and connect a test
Specification: 40 to 75 ohms.
lamp on both cootac~s of disconnected plug.
2. Check power supply.
Starr engine, Test lamp should come on at
coolant temperature below + 30° C/86" F
and ""L come on above + 40' C/104" F.
Bridge fuel pump relay socket terminals 30 and 87.
Disconnected plug should have battery voltage.
2. Check resistance of cold start valve.
Resistance: approx. 4 ohms.
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24 I8
Checking Auxiliary Air Regulator
Checking Cold Start Valve
Printed in Germany